rfc3813
Network Working Group C. Srinivasan
Request for Comments: 3813 Bloomberg L.P.
Category: Standard Track A. Viswanathan
Force10 Networks, Inc.
T. Nadeau
Cisco Systems, Inc.
June 2004
Multiprotocol Label Switching (MPLS) Label Switching
Router (LSR) Management Information Base (MIB)
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2004).
Abstract
This memo defines an portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
In particular, it describes managed objects to configure and/or
monitor a Multiprotocol Label Switching (MPLS) Label Switching Router
(LSR).
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RFC 3813 MPLS LSR MIB June 2004
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology. . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. The SNMP Management Framework. . . . . . . . . . . . . . . . . 3
4. Outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4.1. Summary of LSR MIB Module. . . . . . . . . . . . . . . . 4
5. Brief Description of MIB Module Objects. . . . . . . . . . . . 4
5.1. mplsInterfaceTable . . . . . . . . . . . . . . . . . . . 4
5.2. mplsInterfacePerfTable . . . . . . . . . . . . . . . . . 4
5.3. mplsInSegmentTable . . . . . . . . . . . . . . . . . . . 5
5.4. mplsInSegmentPerfTable . . . . . . . . . . . . . . . . . 5
5.5. mplsOutSegmentTable. . . . . . . . . . . . . . . . . . . 5
5.6. mplsOutSegmentPerfTable. . . . . . . . . . . . . . . . . 5
5.7. mplsXCTable. . . . . . . . . . . . . . . . . . . . . . . 5
5.8. mplsLabelStackTable. . . . . . . . . . . . . . . . . . . 6
5.9. mplsInSegmentMapTable. . . . . . . . . . . . . . . . . . 6
6. Use of 32-bit and 64-bit Counters. . . . . . . . . . . . . . . 6
7. Example of LSP Setup . . . . . . . . . . . . . . . . . . . . . 6
8. Application of the Interface Group to MPLS . . . . . . . . . . 8
8.1. Support of the MPLS Layer by ifTable . . . . . . . . . . 9
9. The Use of RowPointer. . . . . . . . . . . . . . . . . . . . . 10
10. MPLS Label Switching Router MIB Module Definitions . . . . . . 11
11. Security Considerations. . . . . . . . . . . . . . . . . . . . 55
12. Acknowledgments. . . . . . . . . . . . . . . . . . . . . . . . 56
13. IANA Considerations. . . . . . . . . . . . . . . . . . . . . . 56
13.1. IANA Considerations for MPLS-LSR-STD-MIB . . . . . . . . 56
14. References . . . . . . . . . . . . . . . . . . . . . . . . . . 57
14.1. Normative References . . . . . . . . . . . . . . . . . . 57
14.2. Informative References . . . . . . . . . . . . . . . . . 58
15. Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . 59
16. Full Copyright Statement . . . . . . . . . . . . . . . . . . . 60
1. Introduction
This memo defines an portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
In particular, it describes managed objects for modeling a
Multiprotocol Label Switching (MPLS) [RFC3031] Label Switching Router
(LSR).
Comments should be made directly to the MPLS mailing list at
mpls@uu.net.
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in BCP 14, RFC 2119,
reference [RFC2119].
Srinivasan, et al. Standards Track [Page 2]
RFC 3813 MPLS LSR MIB June 2004
2. Terminology
This document uses terminology from the document describing the MPLS
architecture [RFC3031]. A label switched path (LSP) is modeled as a
connection consisting of one or more incoming segments (in-segments)
and/or one or more outgoing segments (out-segments) at a LSR. The
association or interconnection of the in-segments and out-segments is
accomplished by using a cross-connect. We use the terminology
"connection" and "LSP" interchangeably where the meaning is clear
from the context.
in-segment This is analogous to an MPLS label.
out-segment This is analogous to an MPLS label.
cross-connect This describes the conceptual connection
between a set of in-segments and out-segments.
Note that either set may be 0; that is, a
cross-connect may connect only out-segments
together with no in-segments in the case
where an LSP is originating on an LSR.
3. The SNMP Management Framework
For a detailed overview of the documents that describe the current
Internet-Standard Management Framework, please refer to section 7 of
RFC 3410 [RFC3410].
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. MIB objects are generally
accessed through the Simple Network Management Protocol (SNMP).
Objects in the MIB are defined using the mechanisms defined in the
Structure of Management Information (SMI). This memo specifies a MIB
module that is compliant to the SMIv2, which is described in STD 58,
RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
[RFC2580].
4. Outline
Configuring LSPs through an LSR involves the following steps:
- Enabling MPLS on MPLS capable interfaces.
- Configuring in-segments and out-segments.
- Setting up the cross-connect table to associate segments and/or to
indicate connection origination and termination.
- Optionally specifying label stack actions.
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- Optionally specifying segment traffic parameters.
4.1. Summary of LSR MIB Module
The MIB objects for performing these actions consist of the following
tables:
- The interface table (mplsInterfaceTable), which is used for
revealing the MPLS protocol on MPLS-capable interfaces.
- The in-segment (mplsInSegmentTable) and out-segment
(mplsOutSegmentTable) tables, which are used for configuring LSP
segments at an LSR.
- The cross-connect table (mplsXCTable), which is used to associate
in and out segments together, in order to form a cross-connect.
- The label stack table (mplsLabelStackTable), which is used for
specifying label stack operations.
Further, the MPLS in-segment and out-segment performance tables,
mplsInSegmentPerfTable and mplsOutSegmentPerfTable, contain the
objects necessary to measure the performance of LSPs, and
mplsInterfacePerfTable has objects to measure MPLS performance on a
per-interface basis.
These tables are described in the subsequent sections.
5. Brief Description of MIB Module Objects
Sections 5.1-5.2 describe objects pertaining to MPLS-capable
interfaces of an LSR. The objects described in Sections 5.3-5.8,
were derived from the Incoming Label Map (ILM) and Next Hop Label
Forwarding Entry (NHLFE) as specified in the MPLS architecture
document [RFC3031]. It is appropriate to note that the in-segment,
out-segment, and cross-connect tables were modeled after similar
tables found in [RFC2515].
5.1. mplsInterfaceTable
This table represents the interfaces that are MPLS capable. An LSR
creates an entry in this table for every MPLS capable interface on
that LSR.
5.2. mplsInterfacePerfTable
This table contains objects to measure the MPLS performance of MPLS
capable interfaces and is an AUGMENT to mplsInterfaceTable.
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5.3. mplsInSegmentTable
This table contains a description of the incoming MPLS segments to an
LSR and their associated parameters. This index for this table is
mplsInSegmentIndex. The index structure of this table is
specifically designed to handle many different MPLS implementations
that manage their labels both in a distributed and centralized
manner.
The table is designed to handle existing MPLS labels as well as
future label strategies that may require labels longer than the ones
defined in RFC3031. In these cases, the object mplsInSegmentLabelPtr
may be used indicate the first accessible object in a separate table
that can be used to represent the label because it is too long to be
represented in a single 32-bit value (mplsInSegmentLabel).
5.4. mplsInSegmentPerfTable
The MPLS in-Segment Performance Table has objects to measure the
performance of an incoming segment configured on an LSR. It is an
AUGMENT to mplsInSegmentTable. High capacity counters are provided
for objects that are likely to wrap around quickly on high-speed
interfaces.
5.5. mplsOutSegmentTable
The out-Segment Table contains a description of the outgoing MPLS
segments at an LSR and their associated parameters.
5.6. mplsOutSegmentPerfTable
The MPLS out-Segment Table contains objects to measure the
performance of an outgoing segment configured on an LSR. It is an
AUGMENT to mplsOutSegmentTable. High capacity counters are provided
for objects that are likely to wrap around quickly on high-speed
interfaces.
5.7. mplsXCTable
The mplsXCTable specifies information for associating segments
together in order to instruct the LSR to switch between the specified
segments. It supports point-to-point, point-to-multipoint and
multipoint-to-point connections.
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The operational status object indicates the packet forwarding state
of a cross-connect entry. For example, when the operational status
objects is 'down' it indicates that the specified cross-connect entry
will not forward packets. Likewise, when it is set to 'up' it
indicates that packets will be forwarded.
The administrative status object indicates the forwarding state
desired by the operator.
5.8. mplsLabelStackTable
The mplsLabelStackTable specifies the label stack to be pushed onto a
packet, beneath the top label. Entries to this table are referred to
from mplsXCTable.
5.9 mplsInSegmentMapTable
The mplsInSegmentMapTable specifies the mapping from the
mplsInSegmentIndex to the corresponding mplsInSegmentInterface and
mplsInSegmentLabel objects. The purpose of this table is to provide
the manager with an alternative means by which to locate in-segments.
For instance, this table can be useful when tracing LSPs from LSR to
LSR by first following the in-segment to out-segment, retrieving the
outgoing label and out-going interface, and then proceeding to
interrogate this table at the next-hop LSR to continue the trace.
6. Use of 32-bit and 64-bit Counters
64-bit counters are provided in this MIB module for high speed
interfaces where the use of 32-bit counters might be impractical. The
requirements on the use of 32-bit and 64-bit counters (copied
verbatim from [RFC2863]) are as follows.
For interfaces that operate at 20,000,000 (20 million) bits per
second or less, 32-bit byte and packet counters MUST be supported.
For interfaces that operate faster than 20,000,000 bits/second, and
slower than 650,000,000 bits/second, 32-bit packet counters MUST be
supported and 64-bit octet counters MUST be supported. For
interfaces that operate at 650,000,000 bits/second or faster, 64-bit
packet counters AND 64-bit octet counters MUST be supported.
7. Example of LSP Setup
In this section we provide a brief example of setting up an LSP using
this MIB module's objects. While this example is not meant to
illustrate every nuance of the MIB module, it is intended as an aid
to understanding some of the key concepts. It is meant to be read
after going through the MIB module itself.
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Suppose that one would like to manually create a best-effort,
unidirectional LSP. Assume that the LSP enters the LSR via MPLS
interface A with ifIndex 12 and exits the LSR via MPLS interface B
with ifIndex 13. Let us assume that we do not wish to impose any
additional label stack beneath the top label on the outgoing labeled
packets. The following example illustrates which rows and
corresponding objects might be created to accomplish this. Those
objects relevant to illustrating the relationships amongst different
tables are shown here. Other objects may be needed before conceptual
row activation can happen.
The RowStatus values shown in this section are those to be used in
the set request, typically createAndGo(4) which is used to create the
conceptual row and have its status immediately set to active. Note
that the proper use of createAndGo(4) requires that all columns that
do not have a DEFVAL to be specified in order for the SET to succeed.
In the example below we have not specify all such columns for the
sake of keeping the example short. Please keep in mind that all such
fields must be send during a real SET operation. A subsequent
retrieval operation on the conceptual row will return a different
value, such as active(1). Please see [RFC2579] for a detailed
discussion on the use of RowStatus.
We first create a cross-connect entry that associates the desired
segments together.
In mplsXCTable:
{
mplsXCIndex = 0x02,
mplsXCInSegmentIndex = 0x00000015,
mplsXCOutSegmentIndex = 0x01,
mplsXCLspId = 0x0102 -- unique ID
mplsXCLabelStackIndex = 0x00, -- only a single
-- outgoing label
mplsXCRowStatus = createAndGo(4)
}
Next, we create the appropriate in-segment and out-segment entries
based on the cross-connect. Note that some agents may wish to
automatically create the in and out-segments based on the cross-
connect creation.
In mplsInSegmentTable:
{
mplsInSegmentIndex = 0x00000015
mplsInSegmentLabel = 21, -- incoming label
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mplsInSegmentNPop = 1,
mplsInSegmentInterface = 12, -- incoming interface
-- RowPointer MUST point to the first accessible column.
mplsInSegmentLabelPtr = 0.0,
mplsInSegmentTrafficParamPtr = 0.0,
mplsInSegmentRowStatus = createAndGo(4)
}
In mplsOutSegmentTable:
{
mplsOutSegmentIndex = 0x01,
mplsOutSegmentInterface = 13, -- outgoing interface
mplsOutSegmentPushTopLabel = true(1),
mplsOutSegmentTopLabel = 22, -- outgoing label
-- RowPointer MUST point to the first accessible column.
mplsOutSegmentTrafficParamPtr = 0.0,
mplsOutSegmentLabelPtr = 0.0,
mplsOutSegmentRowStatus = createAndGo(4)
}
Note that the mplsInSegmentXCIndex and mplsOutSegmentXCIndex objects
will automatically be populated with the string 0x02 when these
segments are referred to from the corresponding cross-connect entry.
8. Application of the Interface Group to MPLS
RFC2863 defines generic managed objects for managing interfaces.
This memo contains the media-specific extensions to the Interfaces
Group for managing MPLS interfaces.
This memo assumes the interpretation of the Interfaces Group to be in
accordance with [RFC2863] which states that the interfaces table
(ifTable) contains information on the managed resource's interfaces
and that each sub-layer below the internetwork layer of a network
interface is considered an interface. Thus, the MPLS interface is
represented as an entry in the ifTable. The inter-relation of
entries in the ifTable is defined by Interfaces Stack Group defined
in [RFC2863].
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RFC 3813 MPLS LSR MIB June 2004
When using MPLS interfaces, the interface stack table might appear as
follows:
+----------------------------------------+
| MPLS interface; ifType = mpls(166) +
+----------------------------------------+
| Underlying Layer +
+----------------------------------------+
In the above diagram, "Underlying Layer" refers to the ifIndex of any
interface type for which MPLS interworking has been defined.
Examples include ATM, Frame Relay, Ethernet, etc.
8.1. Support of the MPLS Layer by ifTable
Some specific interpretations of ifTable for the MPLS layer follow.
Object Use for the MPLS layer
ifIndex Each MPLS interface is represented by an ifEntry.
ifDescr Description of the MPLS interface.
ifType The value that is allocated for MPLS is 166.
ifSpeed The total bandwidth in bits per second for use by
the MPLS layer.
ifPhysAddress Unused.
ifAdminStatus This variable indicates the administrator's intent
as to whether MPLS should be enabled, disabled, or
running in some diagnostic testing mode on this
interface. Also see [RFC2863].
ifOperStatus This value reflects the actual operational status
of MPLS on this interface.
ifLastChange See [RFC2863].
ifInOctets The number of received octets over the interface,
i.e., the number of received, octets received as
labeled packets.
ifOutOctets The number of transmitted octets over the
interface, i.e., the number of octets transmitted
as labeled packets.
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RFC 3813 MPLS LSR MIB June 2004
ifInErrors The number of labeled packets dropped due to
uncorrectable errors.
ifInUnknownProtos
The number of received packets discarded during
packet header validation, including packets with
unrecognized label values.
ifOutErrors See [RFC2863].
ifName Textual name (unique on this system) of the
interface or an octet string of zero length.
ifLinkUpDownTrapEnable
Default is disabled (2).
ifConnectorPresent
Set to false (2).
ifHighSpeed See [RFC2863].
ifHCInOctets The 64-bit version of ifInOctets; supported if
required by the compliance statements in [RFC2863].
ifHCOutOctets The 64-bit version of ifOutOctets; supported if
required by the compliance statements in [RFC2863].
ifAlias The non-volatile 'alias' name for the interface as
specified by a network manager.
ifCounterDiscontinuityTime
See [RFC2863].
9. The Use of RowPointer
RowPointer is a textual convention used to identify a conceptual row
in a MIB Table by pointing to the first accessible object in that
row. In this MIB module, the trafficParamPtr object from either the
mplsInSegmentTable or mplsOutSegmentTable SHOULD indicate the first
accessible column in an entry in the MplsTunnelResourceEntry in the
MPLS-TE-STD-MIB [RFC3812] to indicate the traffic parameter settings
for this segment, if it represents an LSP used for a TE tunnel.
The trafficParamPtr object may optionally point at an externally
defined traffic parameter specification table. A value of
zeroDotZero indicates best-effort treatment. By having the same
value of this object, two or more segments can indicate resource
sharing of such things as LSP queue space, etc.
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RFC 3813 MPLS LSR MIB June 2004
10. MPLS Label Switching Router MIB Module Definitions
MPLS-LSR-STD-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,
Integer32, Counter32, Unsigned32, Counter64, Gauge32,
zeroDotZero
FROM SNMPv2-SMI -- [RFC2578]
MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP
FROM SNMPv2-CONF -- [RFC2580]
TruthValue, RowStatus, StorageType, RowPointer,
TimeStamp, TEXTUAL-CONVENTION
FROM SNMPv2-TC -- [RFC2579]
InterfaceIndexOrZero, ifGeneralInformationGroup,
ifCounterDiscontinuityGroup
FROM IF-MIB -- [RFC2863]
mplsStdMIB, MplsLSPID, MplsLabel, MplsBitRate,
MplsOwner
FROM MPLS-TC-STD-MIB -- [RFC3811]
AddressFamilyNumbers
FROM IANA-ADDRESS-FAMILY-NUMBERS-MIB -- [IANAFamily]
InetAddress, InetAddressType
FROM INET-ADDRESS-MIB -- [RFC3291]
;
mplsLsrStdMIB MODULE-IDENTITY
LAST-UPDATED "200406030000Z" -- June 3, 2004
ORGANIZATION "Multiprotocol Label Switching (MPLS) Working Group"
CONTACT-INFO
" Cheenu Srinivasan
Bloomberg L.P.
Email: cheenu@bloomberg.net
Arun Viswanathan
Force10 Networks, Inc.
Email: arunv@force10networks.com
Thomas D. Nadeau
Cisco Systems, Inc.
Email: tnadeau@cisco.com
Comments about this document should be emailed
directly to the MPLS working group mailing list at
mpls@uu.net."
DESCRIPTION
"This MIB module contains managed object definitions for
the Multiprotocol Label Switching (MPLS) Router as
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RFC 3813 MPLS LSR MIB June 2004
defined in: Rosen, E., Viswanathan, A., and R.
Callon, Multiprotocol Label Switching Architecture,
RFC 3031, January 2001.
Copyright (C) The Internet Society (2004). The
initial version of this MIB module was published
in RFC 3812. For full legal notices see the RFC
itself or see:
http://www.ietf.org/copyrights/ianamib.html"
-- Revision history.
REVISION
"200406030000Z" -- June 3, 2004
DESCRIPTION
"Initial revision, published as part of RFC 3813."
::= { mplsStdMIB 2 }
-- TEXTUAL-CONVENTIONs
MplsIndexType ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"This is an octet string that can be used as a table
index in cases where a large addressable space is
required such as on an LSR where many applications
may be provisioning labels.
Note that the string containing the single octet with
the value 0x00 is a reserved value used to represent
special cases. When this TEXTUAL-CONVENTION is used
as the SYNTAX of an object, the DESCRIPTION clause
MUST specify if this special value is valid and if so
what the special meaning is.
In systems that provide write access to the MPLS-LSR-STD
MIB, mplsIndexType SHOULD be used as a simple multi-digit
integer encoded as an octet string.
No further overloading of the meaning of an index SHOULD
be made.
In systems that do not offer write access to the MPLS-LSR-STD
MIB, the mplsIndexType may contain implicit formatting that is
specific to the implementation to convey additional
information such as interface index, physical card or
device, or application id. The interpretation of this
additional formatting is implementation dependent and
not covered in this document. Such formatting MUST
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NOT impact the basic functionality of read-only access
to the MPLS-LSR-STD MIB by management applications that are
not aware of the formatting rules."
SYNTAX OCTET STRING (SIZE(1..24))
MplsIndexNextType ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"When a MIB module is used for configuration, an object with
this SYNTAX always contains a legal value (a non-zero-length
string) for an index that is not currently used in the relevant
table. The Command Generator (Network Management Application)
reads this variable and uses the (non-zero-length string)
value read when creating a new row with an SNMP SET.
When the SET is performed, the Command Responder (agent) must
determine whether the value is indeed still unused; Two Network
Management Applications may attempt to create a row
(configuration entry) simultaneously and use the same value. If
it is currently unused, the SET succeeds and the Command
Responder (agent) changes the value of this object, according
to an implementation-specific algorithm. If the value is in
use, however, the SET fails. The Network Management
Application must then re-read this variable to obtain a new
usable value.
Note that the string containing the single octet with
the value 0x00 is a reserved value used to represent
the special case where no additional indexes can be
provisioned, or in systems that do not offer
write access, objects defined using this TEXTUAL-CONVENTION
MUST return the string containing the single
octet with the value 0x00."
SYNTAX OCTET STRING (SIZE(1..24))
-- Top level components of this MIB module.
-- Notifications
mplsLsrNotifications OBJECT IDENTIFIER ::= { mplsLsrStdMIB 0 }
-- Tables, Scalars
mplsLsrObjects OBJECT IDENTIFIER ::= { mplsLsrStdMIB 1 }
-- Conformance
mplsLsrConformance OBJECT IDENTIFIER ::= { mplsLsrStdMIB 2 }
-- MPLS Interface Table.
mplsInterfaceTable OBJECT-TYPE
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RFC 3813 MPLS LSR MIB June 2004
SYNTAX SEQUENCE OF MplsInterfaceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table specifies per-interface MPLS capability
and associated information."
::= { mplsLsrObjects 1 }
mplsInterfaceEntry OBJECT-TYPE
SYNTAX MplsInterfaceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row in this table is created
automatically by an LSR for every interface capable
of supporting MPLS and which is configured to do so.
A conceptual row in this table will exist if and only if
a corresponding entry in ifTable exists with ifType =
mpls(166). If this associated entry in ifTable is
operationally disabled (thus removing MPLS
capabilities on that interface), the corresponding
entry in this table MUST be deleted shortly thereafter.
An conceptual row with index 0 is created if the LSR
supports per-platform labels. This conceptual row
represents the per-platform label space and contains
parameters that apply to all interfaces that participate
in the per-platform label space. Other conceptual rows
in this table represent MPLS interfaces that may
participate in either the per-platform or per-
interface label spaces, or both. Implementations
that either only support per-platform labels,
or have only them configured, may choose to return
just the mplsInterfaceEntry of 0 and not return
the other rows. This will greatly reduce the number
of objects returned. Further information about label
space participation of an interface is provided in
the DESCRIPTION clause of
mplsInterfaceLabelParticipationType."
INDEX { mplsInterfaceIndex }
::= { mplsInterfaceTable 1 }
MplsInterfaceEntry ::= SEQUENCE {
mplsInterfaceIndex InterfaceIndexOrZero,
mplsInterfaceLabelMinIn MplsLabel,
mplsInterfaceLabelMaxIn MplsLabel,
mplsInterfaceLabelMinOut MplsLabel,
mplsInterfaceLabelMaxOut MplsLabel,
mplsInterfaceTotalBandwidth MplsBitRate,
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RFC 3813 MPLS LSR MIB June 2004
mplsInterfaceAvailableBandwidth MplsBitRate,
mplsInterfaceLabelParticipationType BITS
}
mplsInterfaceIndex OBJECT-TYPE
SYNTAX InterfaceIndexOrZero
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This is a unique index for an entry in the
MplsInterfaceTable. A non-zero index for an
entry indicates the ifIndex for the corresponding
interface entry of the MPLS-layer in the ifTable.
The entry with index 0 represents the per-platform
label space and contains parameters that apply to all
interfaces that participate in the per-platform label
space. Other entries defined in this table represent
additional MPLS interfaces that may participate in either
the per-platform or per-interface label spaces, or both."
REFERENCE
"RFC 2863 - The Interfaces Group MIB, McCloghrie, K.,
and F. Kastenholtz, June 2000"
::= { mplsInterfaceEntry 1 }
mplsInterfaceLabelMinIn OBJECT-TYPE
SYNTAX MplsLabel
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This is the minimum value of an MPLS label that this
LSR is willing to receive on this interface."
::= { mplsInterfaceEntry 2 }
mplsInterfaceLabelMaxIn OBJECT-TYPE
SYNTAX MplsLabel
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This is the maximum value of an MPLS label that this
LSR is willing to receive on this interface."
::= { mplsInterfaceEntry 3 }
mplsInterfaceLabelMinOut OBJECT-TYPE
SYNTAX MplsLabel
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This is the minimum value of an MPLS label that this
Srinivasan, et al. Standards Track [Page 15]
RFC 3813 MPLS LSR MIB June 2004
LSR is willing to send on this interface."
::= { mplsInterfaceEntry 4 }
mplsInterfaceLabelMaxOut OBJECT-TYPE
SYNTAX MplsLabel
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This is the maximum value of an MPLS label that this
LSR is willing to send on this interface."
::= { mplsInterfaceEntry 5 }
mplsInterfaceTotalBandwidth OBJECT-TYPE
SYNTAX MplsBitRate
UNITS "kilobits per second"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This value indicates the total amount of usable
bandwidth on this interface and is specified in
kilobits per second (Kbps). This variable is not
applicable when applied to the interface with index
0. When this value cannot be measured, this value
should contain the nominal bandwidth."
::= { mplsInterfaceEntry 6 }
mplsInterfaceAvailableBandwidth OBJECT-TYPE
SYNTAX MplsBitRate
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This value indicates the total amount of available
bandwidth available on this interface and is
specified in kilobits per second (Kbps). This value
is calculated as the difference between the amount
of bandwidth currently in use and that specified in
mplsInterfaceTotalBandwidth. This variable is not
applicable when applied to the interface with index
0. When this value cannot be measured, this value
should contain the nominal bandwidth."
::= { mplsInterfaceEntry 7 }
mplsInterfaceLabelParticipationType OBJECT-TYPE
SYNTAX BITS {
perPlatform (0),
perInterface (1)
}
MAX-ACCESS read-only
Srinivasan, et al. Standards Track [Page 16]
RFC 3813 MPLS LSR MIB June 2004
STATUS current
DESCRIPTION
"If the value of the mplsInterfaceIndex for this
entry is zero, then this entry corresponds to the
per-platform label space for all interfaces configured
to use that label space. In this case the perPlatform(0)
bit MUST be set; the perInterface(1) bit is meaningless
and MUST be ignored.
The remainder of this description applies to entries
with a non-zero value of mplsInterfaceIndex.
If the perInterface(1) bit is set then the value of
mplsInterfaceLabelMinIn, mplsInterfaceLabelMaxIn,
mplsInterfaceLabelMinOut, and
mplsInterfaceLabelMaxOut for this entry reflect the
label ranges for this interface.
If only the perPlatform(0) bit is set, then the value of
mplsInterfaceLabelMinIn, mplsInterfaceLabelMaxIn,
mplsInterfaceLabelMinOut, and
mplsInterfaceLabelMaxOut for this entry MUST be
identical to the instance of these objects with
index 0. These objects may only vary from the entry
with index 0 if both the perPlatform(0) and perInterface(1)
bits are set.
In all cases, at a minimum one of the perPlatform(0) or
perInterface(1) bits MUST be set to indicate that
at least one label space is in use by this interface. In
all cases, agents MUST ensure that label ranges are
specified consistently and MUST return an
inconsistentValue error when they do not."
REFERENCE
"Rosen, E., Viswanathan, A., and R. Callon,
Multiprotocol Label Switching Architecture, RFC
3031, January 2001."
::= { mplsInterfaceEntry 8 }
-- End of mplsInterfaceTable
-- MPLS Interface Performance Table.
mplsInterfacePerfTable OBJECT-TYPE
SYNTAX SEQUENCE OF MplsInterfacePerfEntry
MAX-ACCESS not-accessible
STATUS current
Srinivasan, et al. Standards Track [Page 17]
RFC 3813 MPLS LSR MIB June 2004
DESCRIPTION
"This table provides MPLS performance information on
a per-interface basis."
::= { mplsLsrObjects 2 }
mplsInterfacePerfEntry OBJECT-TYPE
SYNTAX MplsInterfacePerfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table is created by the LSR for
every interface capable of supporting MPLS. Its is
an extension to the mplsInterfaceEntry table.
Note that the discontinuity behavior of entries in
this table MUST be based on the corresponding
ifEntry's ifDiscontinuityTime."
AUGMENTS { mplsInterfaceEntry }
::= { mplsInterfacePerfTable 1 }
MplsInterfacePerfEntry ::= SEQUENCE {
-- incoming direction
mplsInterfacePerfInLabelsInUse Gauge32,
mplsInterfacePerfInLabelLookupFailures Counter32,
-- outgoing direction
mplsInterfacePerfOutLabelsInUse Gauge32,
mplsInterfacePerfOutFragmentedPkts Counter32
}
mplsInterfacePerfInLabelsInUse OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object counts the number of labels that are in
use at this point in time on this interface in the
incoming direction. If the interface participates in
only the per-platform label space, then the value of
the instance of this object MUST be identical to
the value of the instance with index 0. If the
interface participates in the per-interface label
space, then the instance of this object MUST
represent the number of per-interface labels that
are in use on this interface."
::= { mplsInterfacePerfEntry 1 }
mplsInterfacePerfInLabelLookupFailures OBJECT-TYPE
SYNTAX Counter32
Srinivasan, et al. Standards Track [Page 18]
RFC 3813 MPLS LSR MIB June 2004
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object counts the number of labeled packets
that have been received on this interface and which
were discarded because there was no matching cross-
connect entry. This object MUST count on a per-
interface basis regardless of which label space the
interface participates in."
::= { mplsInterfacePerfEntry 2 }
mplsInterfacePerfOutLabelsInUse OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object counts the number of top-most labels in
the outgoing label stacks that are in use at this
point in time on this interface. This object MUST
count on a per-interface basis regardless of which
label space the interface participates in."
::= { mplsInterfacePerfEntry 3 }
mplsInterfacePerfOutFragmentedPkts OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object counts the number of outgoing MPLS
packets that required fragmentation before
transmission on this interface. This object MUST
count on a per-interface basis regardless of which
label space the interface participates in."
::= { mplsInterfacePerfEntry 4 }
-- mplsInterfacePerf Table end.
mplsInSegmentIndexNext OBJECT-TYPE
SYNTAX MplsIndexNextType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object contains the next available value to
be used for mplsInSegmentIndex when creating entries
in the mplsInSegmentTable. The special value of a
string containing the single octet 0x00 indicates
that no new entries can be created in this table.
Agents not allowing managers to create entries
Srinivasan, et al. Standards Track [Page 19]
RFC 3813 MPLS LSR MIB June 2004
in this table MUST set this object to this special
value."
::= { mplsLsrObjects 3 }
-- in-segment table.
mplsInSegmentTable OBJECT-TYPE
SYNTAX SEQUENCE OF MplsInSegmentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains a description of the incoming MPLS
segments (labels) to an LSR and their associated parameters.
The index for this table is mplsInSegmentIndex.
The index structure of this table is specifically designed
to handle many different MPLS implementations that manage
their labels both in a distributed and centralized manner.
The table is also designed to handle existing MPLS labels
as defined in RFC3031 as well as longer ones that may
be necessary in the future.
In cases where the label cannot fit into the
mplsInSegmentLabel object, the mplsInSegmentLabelPtr
will indicate this by being set to the first accessible
column in the appropriate extension table's row.
In this case an additional table MUST
be provided and MUST be indexed by at least the indexes
used by this table. In all other cases when the label is
represented within the mplsInSegmentLabel object, the
mplsInSegmentLabelPtr MUST be set to 0.0. Due to the
fact that MPLS labels may not exceed 24 bits, the
mplsInSegmentLabelPtr object is only a provision for
future-proofing the MIB module. Thus, the definition
of any extension tables is beyond the scope of this
MIB module."
::= { mplsLsrObjects 4 }
mplsInSegmentEntry OBJECT-TYPE
SYNTAX MplsInSegmentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table represents one incoming
segment as is represented in an LSR's LFIB.
An entry can be created by a network
administrator or an SNMP agent, or an MPLS signaling
protocol. The creator of the entry is denoted by
mplsInSegmentOwner.
Srinivasan, et al. Standards Track [Page 20]
RFC 3813 MPLS LSR MIB June 2004
The value of mplsInSegmentRowStatus cannot be active(1)
unless the ifTable entry corresponding to
mplsInSegmentInterface exists. An entry in this table
must match any incoming packets, and indicates an
instance of mplsXCEntry based on which forwarding
and/or switching actions are taken."
INDEX { mplsInSegmentIndex }
::= { mplsInSegmentTable 1 }
MplsInSegmentEntry ::= SEQUENCE {
mplsInSegmentIndex MplsIndexType,
mplsInSegmentInterface InterfaceIndexOrZero,
mplsInSegmentLabel MplsLabel,
mplsInSegmentLabelPtr RowPointer,
mplsInSegmentNPop Integer32,
mplsInSegmentAddrFamily AddressFamilyNumbers,
mplsInSegmentXCIndex MplsIndexType,
mplsInSegmentOwner MplsOwner ,
mplsInSegmentTrafficParamPtr RowPointer,
mplsInSegmentRowStatus RowStatus,
mplsInSegmentStorageType StorageType
}
mplsInSegmentIndex OBJECT-TYPE
SYNTAX MplsIndexType
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The index for this in-segment. The
string containing the single octet 0x00
MUST not be used as an index."
::= { mplsInSegmentEntry 1 }
mplsInSegmentInterface OBJECT-TYPE
SYNTAX InterfaceIndexOrZero
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object represents the
interface index for the incoming MPLS interface. A
value of zero represents all interfaces participating in
the per-platform label space. This may only be used
in cases where the incoming interface and label
are associated with the same mplsXCEntry. Specifically,
given a label and any incoming interface pair from the
per-platform label space, the outgoing label/interface
mapping remains the same. If this is not the case,
then individual entries MUST exist that
Srinivasan, et al. Standards Track [Page 21]
RFC 3813 MPLS LSR MIB June 2004
can then be mapped to unique mplsXCEntries."
::= { mplsInSegmentEntry 2 }
mplsInSegmentLabel OBJECT-TYPE
SYNTAX MplsLabel
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"If the corresponding instance of mplsInSegmentLabelPtr is
zeroDotZero then this object MUST contain the incoming label
associated with this in-segment. If not this object SHOULD
be zero and MUST be ignored."
::= { mplsInSegmentEntry 3 }
mplsInSegmentLabelPtr OBJECT-TYPE
SYNTAX RowPointer
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"If the label for this segment cannot be represented
fully within the mplsInSegmentLabel object,
this object MUST point to the first accessible
column of a conceptual row in an external table containing
the label. In this case, the mplsInSegmentTopLabel
object SHOULD be set to 0 and ignored. This object MUST
be set to zeroDotZero otherwise."
DEFVAL { zeroDotZero }
::= { mplsInSegmentEntry 4 }
mplsInSegmentNPop OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The number of labels to pop from the incoming
packet. Normally only the top label is popped from
the packet and used for all switching decisions for
that packet. This is indicated by setting this
object to the default value of 1. If an LSR supports
popping of more than one label, this object MUST
be set to that number. This object cannot be modified
if mplsInSegmentRowStatus is active(1)."
DEFVAL { 1 }
::= { mplsInSegmentEntry 5 }
mplsInSegmentAddrFamily OBJECT-TYPE
SYNTAX AddressFamilyNumbers
MAX-ACCESS read-create
Srinivasan, et al. Standards Track [Page 22]
RFC 3813 MPLS LSR MIB June 2004
STATUS current
DESCRIPTION
"The IANA address family [IANAFamily] of packets
received on this segment, which is used at an egress
LSR to deliver them to the appropriate layer 3 entity.
A value of other(0) indicates that the family type is
either unknown or undefined; this SHOULD NOT be used
at an egress LSR. This object cannot be
modified if mplsInSegmentRowStatus is active(1)."
REFERENCE
"Internet Assigned Numbers Authority (IANA), ADDRESS
FAMILY NUMBERS, (http://www.iana.org/assignments/
address-family-numbers), for MIB see:
http://www.iana.org/assignments/
ianaaddressfamilynumbers-mib
"
DEFVAL { other }
::= { mplsInSegmentEntry 6 }
mplsInSegmentXCIndex OBJECT-TYPE
SYNTAX MplsIndexType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Index into mplsXCTable which identifies which cross-
connect entry this segment is part of. The string
containing the single octet 0x00 indicates that this
entry is not referred to by any cross-connect entry.
When a cross-connect entry is created which this
in-segment is a part of, this object is automatically
updated to reflect the value of mplsXCIndex of that
cross-connect entry."
::= { mplsInSegmentEntry 7 }
mplsInSegmentOwner OBJECT-TYPE
SYNTAX MplsOwner
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Denotes the entity that created and is responsible
for managing this segment."
::= { mplsInSegmentEntry 8 }
mplsInSegmentTrafficParamPtr OBJECT-TYPE
SYNTAX RowPointer
MAX-ACCESS read-create
STATUS current
DESCRIPTION
Srinivasan, et al. Standards Track [Page 23]
RFC 3813 MPLS LSR MIB June 2004
"This variable represents a pointer to the traffic
parameter specification for this in-segment. This
value may point at an entry in the
mplsTunnelResourceTable in the MPLS-TE-STD-MIB (RFC3812)
to indicate which traffic parameter settings for this
segment if it represents an LSP used for a TE tunnel.
This value may optionally point at an
externally defined traffic parameter specification
table. A value of zeroDotZero indicates best-effort
treatment. By having the same value of this object,
two or more segments can indicate resource sharing
of such things as LSP queue space, etc.
This object cannot be modified if mplsInSegmentRowStatus
is active(1). For entries in this table that
are preserved after a re-boot, the agent MUST ensure
that their integrity be preserved, or this object should
be set to 0.0 if it cannot."
DEFVAL { zeroDotZero }
::= { mplsInSegmentEntry 9 }
mplsInSegmentRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable is used to create, modify, and/or
delete a row in this table. When a row in this
table has a row in the active(1) state, no
objects in this row can be modified except the
mplsInSegmentRowStatus and mplsInSegmentStorageType."
::= { mplsInSegmentEntry 10 }
mplsInSegmentStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable indicates the storage type for this
object. The agent MUST ensure that this object's
value remains consistent with the associated
mplsXCEntry. Conceptual rows having the value
'permanent' need not allow write-access to any
columnar objects in the row."
REFERENCE
"See RFC2579."
DEFVAL { volatile }
Srinivasan, et al. Standards Track [Page 24]
RFC 3813 MPLS LSR MIB June 2004
::= { mplsInSegmentEntry 11 }
-- End of mplsInSegmentTable
-- in-segment performance table.
mplsInSegmentPerfTable OBJECT-TYPE
SYNTAX SEQUENCE OF MplsInSegmentPerfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains statistical information for
incoming MPLS segments to an LSR."
::= { mplsLsrObjects 5 }
mplsInSegmentPerfEntry OBJECT-TYPE
SYNTAX MplsInSegmentPerfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table contains statistical
information about one incoming segment which is
configured in the mplsInSegmentTable. The counters
in this entry should behave in a manner similar to
that of the interface.
mplsInSegmentPerfDiscontinuityTime indicates the
time of the last discontinuity in all of these
objects."
AUGMENTS { mplsInSegmentEntry }
::= { mplsInSegmentPerfTable 1 }
MplsInSegmentPerfEntry ::= SEQUENCE {
mplsInSegmentPerfOctets Counter32,
mplsInSegmentPerfPackets Counter32,
mplsInSegmentPerfErrors Counter32,
mplsInSegmentPerfDiscards Counter32,
-- high capacity counter
mplsInSegmentPerfHCOctets Counter64,
mplsInSegmentPerfDiscontinuityTime TimeStamp
}
mplsInSegmentPerfOctets OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
Srinivasan, et al. Standards Track [Page 25]
RFC 3813 MPLS LSR MIB June 2004
"This value represents the total number of octets
received by this segment. It MUST be equal to the
least significant 32 bits of
mplsInSegmentPerfHCOctets
if mplsInSegmentPerfHCOctets is supported according to
the rules spelled out in RFC2863."
::= { mplsInSegmentPerfEntry 1 }
mplsInSegmentPerfPackets OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of packets received by this segment."
::= { mplsInSegmentPerfEntry 2 }
mplsInSegmentPerfErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of errored packets received on this
segment."
::= { mplsInSegmentPerfEntry 3 }
mplsInSegmentPerfDiscards OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of labeled packets received on this in-
segment, which were chosen to be discarded even
though no errors had been detected to prevent their
being transmitted. One possible reason for
discarding such a labeled packet could be to free up
buffer space."
::= { mplsInSegmentPerfEntry 4 }
mplsInSegmentPerfHCOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of octets received. This is the 64
bit version of mplsInSegmentPerfOctets,
if mplsInSegmentPerfHCOctets is supported according to
the rules spelled out in RFC2863."
::= { mplsInSegmentPerfEntry 5 }
Srinivasan, et al. Standards Track [Page 26]
RFC 3813 MPLS LSR MIB June 2004
mplsInSegmentPerfDiscontinuityTime OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime on the most recent occasion
at which any one or more of this segment's Counter32
or Counter64 suffered a discontinuity. If no such
discontinuities have occurred since the last re-
initialization of the local management subsystem,
then this object contains a zero value."
::= { mplsInSegmentPerfEntry 6 }
-- End of mplsInSegmentPerfTable.
-- out-segment table.
mplsOutSegmentIndexNext OBJECT-TYPE
SYNTAX MplsIndexNextType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object contains the next available value to
be used for mplsOutSegmentIndex when creating entries
in the mplsOutSegmentTable. The special value of a
string containing the single octet 0x00
indicates that no new entries can be created in this
table. Agents not allowing managers to create entries
in this table MUST set this object to this special
value."
::= { mplsLsrObjects 6 }
mplsOutSegmentTable OBJECT-TYPE
SYNTAX SEQUENCE OF MplsOutSegmentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains a representation of the outgoing
segments from an LSR."
::= { mplsLsrObjects 7 }
mplsOutSegmentEntry OBJECT-TYPE
SYNTAX MplsOutSegmentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table represents one outgoing
Srinivasan, et al. Standards Track [Page 27]
RFC 3813 MPLS LSR MIB June 2004
segment. An entry can be created by a network
administrator, an SNMP agent, or an MPLS signaling
protocol. The object mplsOutSegmentOwner indicates
the creator of this entry. The value of
mplsOutSegmentRowStatus cannot be active(1) unless
the ifTable entry corresponding to
mplsOutSegmentInterface exists.
Note that the indexing of this table uses a single,
arbitrary index (mplsOutSegmentIndex) to indicate
which out-segment (i.e.: label) is being switched to
from which in-segment (i.e: label) or in-segments.
This is necessary because it is possible to have an
equal-cost multi-path situation where two identical
out-going labels are assigned to the same
cross-connect (i.e.: they go to two different neighboring
LSRs); thus, requiring two out-segments. In order to
preserve the uniqueness of the references
by the mplsXCEntry, an arbitrary integer must be used as
the index for this table."
INDEX { mplsOutSegmentIndex }
::= { mplsOutSegmentTable 1 }
MplsOutSegmentEntry ::= SEQUENCE {
mplsOutSegmentIndex MplsIndexType,
mplsOutSegmentInterface InterfaceIndexOrZero,
mplsOutSegmentPushTopLabel TruthValue,
mplsOutSegmentTopLabel MplsLabel,
mplsOutSegmentTopLabelPtr RowPointer,
mplsOutSegmentNextHopAddrType InetAddressType,
mplsOutSegmentNextHopAddr InetAddress,
mplsOutSegmentXCIndex MplsIndexType,
mplsOutSegmentOwner MplsOwner,
mplsOutSegmentTrafficParamPtr RowPointer,
mplsOutSegmentRowStatus RowStatus,
mplsOutSegmentStorageType StorageType
}
mplsOutSegmentIndex OBJECT-TYPE
SYNTAX MplsIndexType
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This value contains a unique index for this row.
While a value of a string containing the single
octet 0x00 is not valid as an index for entries
in this table, it can be supplied as a valid value
to index the mplsXCTable to represent entries for
Srinivasan, et al. Standards Track [Page 28]
RFC 3813 MPLS LSR MIB June 2004
which no out-segment has been configured or
exists."
::= { mplsOutSegmentEntry 1 }
mplsOutSegmentInterface OBJECT-TYPE
SYNTAX InterfaceIndexOrZero
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This value must contain the interface index of the
outgoing interface. This object cannot be modified
if mplsOutSegmentRowStatus is active(1). The
mplsOutSegmentRowStatus cannot be set to active(1)
until this object is set to a value corresponding to
a valid ifEntry."
::= { mplsOutSegmentEntry 2 }
mplsOutSegmentPushTopLabel OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This value indicates whether or not a top label
should be pushed onto the outgoing packet's label
stack. The value of this variable MUST be set to
true(1) if the outgoing interface does not support
pop-and-go (and no label stack remains). For example,
on ATM interface, or if the segment represents a
tunnel origination. Note that it is considered
an error in the case that mplsOutSegmentPushTopLabel
is set to false, but the cross-connect entry which
refers to this out-segment has a non-zero
mplsLabelStackIndex. The LSR MUST ensure that this
situation does not happen. This object cannot be
modified if mplsOutSegmentRowStatus is active(1)."
DEFVAL { true }
::= { mplsOutSegmentEntry 3 }
mplsOutSegmentTopLabel OBJECT-TYPE
SYNTAX MplsLabel
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"If mplsOutSegmentPushTopLabel is true then this
represents the label that should be pushed onto the
top of the outgoing packet's label stack. Otherwise
this value SHOULD be set to 0 by the management
station and MUST be ignored by the agent. This
Srinivasan, et al. Standards Track [Page 29]
RFC 3813 MPLS LSR MIB June 2004
object cannot be modified if mplsOutSegmentRowStatus
is active(1)."
DEFVAL { 0 }
::= { mplsOutSegmentEntry 4 }
mplsOutSegmentTopLabelPtr OBJECT-TYPE
SYNTAX RowPointer
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"If the label for this segment cannot be represented
fully within the mplsOutSegmentLabel object,
this object MUST point to the first accessible
column of a conceptual row in an external table containing
the label. In this case, the mplsOutSegmentTopLabel
object SHOULD be set to 0 and ignored. This object
MUST be set to zeroDotZero otherwise."
DEFVAL { zeroDotZero }
::= { mplsOutSegmentEntry 5 }
mplsOutSegmentNextHopAddrType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Indicates the next hop Internet address type.
Only values unknown(0), ipv4(1) or ipv6(2)
have to be supported.
A value of unknown(0) is allowed only when
the outgoing interface is of type point-to-point.
If any other unsupported values are attempted in a set
operation, the agent MUST return an inconsistentValue
error."
REFERENCE
"See RFC3291."
::= { mplsOutSegmentEntry 6 }
mplsOutSegmentNextHopAddr OBJECT-TYPE
SYNTAX InetAddress
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The internet address of the next hop. The type of
this address is determined by the value of the
mplslOutSegmentNextHopAddrType object.
This object cannot be modified if
Srinivasan, et al. Standards Track [Page 30]
RFC 3813 MPLS LSR MIB June 2004
mplsOutSegmentRowStatus is active(1)."
::= { mplsOutSegmentEntry 7 }
mplsOutSegmentXCIndex OBJECT-TYPE
SYNTAX MplsIndexType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Index into mplsXCTable which identifies which cross-
connect entry this segment is part of. A value of
the string containing the single octet 0x00
indicates that this entry is not referred
to by any cross-connect entry. When a cross-connect
entry is created which this out-segment is a part of,
this object MUST be updated by the agent to reflect
the value of mplsXCIndex of that cross-connect
entry."
::= { mplsOutSegmentEntry 8 }
mplsOutSegmentOwner OBJECT-TYPE
SYNTAX MplsOwner
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Denotes the entity which created and is responsible
for managing this segment."
::= { mplsOutSegmentEntry 9 }
mplsOutSegmentTrafficParamPtr OBJECT-TYPE
SYNTAX RowPointer
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable represents a pointer to the traffic
parameter specification for this out-segment. This
value may point at an entry in the
MplsTunnelResourceEntry in the MPLS-TE-STD-MIB (RFC3812)
RFC Editor: Please fill in RFC number.
to indicate which traffic parameter settings for this
segment if it represents an LSP used for a TE tunnel.
This value may optionally point at an
externally defined traffic parameter specification
table. A value of zeroDotZero indicates best-effort
treatment. By having the same value of this object,
two or more segments can indicate resource sharing
Srinivasan, et al. Standards Track [Page 31]
RFC 3813 MPLS LSR MIB June 2004
of such things as LSP queue space, etc.
This object cannot be modified if
mplsOutSegmentRowStatus is active(1).
For entries in this table that
are preserved after a re-boot, the agent MUST ensure
that their integrity be preserved, or this object should
be set to 0.0 if it cannot."
DEFVAL { zeroDotZero }
::= { mplsOutSegmentEntry 10 }
mplsOutSegmentRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"For creating, modifying, and deleting this row.
When a row in this table has a row in the active(1)
state, no objects in this row can be modified
except the mplsOutSegmentRowStatus or
mplsOutSegmentStorageType."
::= { mplsOutSegmentEntry 11 }
mplsOutSegmentStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable indicates the storage type for this
object. The agent MUST ensure that this object's value
remains consistent with the associated mplsXCEntry.
Conceptual rows having the value 'permanent'
need not allow write-access to any columnar
objects in the row."
DEFVAL { volatile }
::= { mplsOutSegmentEntry 12 }
-- End of mplsOutSegmentTable
-- out-segment performance table.
mplsOutSegmentPerfTable OBJECT-TYPE
SYNTAX SEQUENCE OF MplsOutSegmentPerfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains statistical information about
Srinivasan, et al. Standards Track [Page 32]
RFC 3813 MPLS LSR MIB June 2004
outgoing segments from an LSR. The counters in this
entry should behave in a manner similar to that of
the interface."
::= { mplsLsrObjects 8 }
mplsOutSegmentPerfEntry OBJECT-TYPE
SYNTAX MplsOutSegmentPerfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table contains statistical
information about one outgoing segment configured in
mplsOutSegmentTable. The object
mplsOutSegmentPerfDiscontinuityTime indicates the
time of the last discontinuity in these objects. "
AUGMENTS { mplsOutSegmentEntry }
::= { mplsOutSegmentPerfTable 1 }
MplsOutSegmentPerfEntry ::= SEQUENCE {
mplsOutSegmentPerfOctets Counter32,
mplsOutSegmentPerfPackets Counter32,
mplsOutSegmentPerfErrors Counter32,
mplsOutSegmentPerfDiscards Counter32,
-- HC counter
mplsOutSegmentPerfHCOctets Counter64,
mplsOutSegmentPerfDiscontinuityTime TimeStamp
}
mplsOutSegmentPerfOctets OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This value contains the total number of octets sent
on this segment. It MUST be equal to the least
significant 32 bits of mplsOutSegmentPerfHCOctets
if mplsOutSegmentPerfHCOctets is supported according to
the rules spelled out in RFC2863."
::= { mplsOutSegmentPerfEntry 1 }
mplsOutSegmentPerfPackets OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This value contains the total number of packets sent
Srinivasan, et al. Standards Track [Page 33]
RFC 3813 MPLS LSR MIB June 2004
on this segment."
::= { mplsOutSegmentPerfEntry 2 }
mplsOutSegmentPerfErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of packets that could not be sent due to
errors on this segment."
::= { mplsOutSegmentPerfEntry 3 }
mplsOutSegmentPerfDiscards OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of labeled packets attempted to be transmitted
on this out-segment, which were chosen to be discarded
even though no errors had been detected to prevent their
being transmitted. One possible reason for
discarding such a labeled packet could be to free up
buffer space."
::= { mplsOutSegmentPerfEntry 4 }
mplsOutSegmentPerfHCOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total number of octets sent. This is the 64 bit
version of mplsOutSegmentPerfOctets,
if mplsOutSegmentPerfHCOctets is supported according to
the rules spelled out in RFC2863."
::= { mplsOutSegmentPerfEntry 5 }
mplsOutSegmentPerfDiscontinuityTime OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime on the most recent occasion
at which any one or more of this segment's Counter32
or Counter64 suffered a discontinuity. If no such
discontinuities have occurred since the last re-
initialization of the local management subsystem,
then this object contains a zero value."
::= { mplsOutSegmentPerfEntry 6 }
Srinivasan, et al. Standards Track [Page 34]
RFC 3813 MPLS LSR MIB June 2004
-- End of mplsOutSegmentPerfTable.
-- Cross-connect table.
mplsXCIndexNext OBJECT-TYPE
SYNTAX MplsIndexNextType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object contains the next available value to
be used for mplsXCIndex when creating entries in
the mplsXCTable. A special value of the zero length
string indicates that no more new entries can be created
in the relevant table. Agents not allowing managers
to create entries in this table MUST set this value
to the zero length string."
::= { mplsLsrObjects 9 }
mplsXCTable OBJECT-TYPE
SYNTAX SEQUENCE OF MplsXCEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table specifies information for switching
between LSP segments. It supports point-to-point,
point-to-multipoint and multipoint-to-point
connections. mplsLabelStackTable specifies the
label stack information for a cross-connect LSR and
is referred to from mplsXCTable."
::= { mplsLsrObjects 10 }
mplsXCEntry OBJECT-TYPE
SYNTAX MplsXCEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A row in this table represents one cross-connect
entry. It is indexed by the following objects:
- cross-connect index mplsXCIndex that uniquely
identifies a group of cross-connect entries
- in-segment index, mplsXCInSegmentIndex
- out-segment index, mplsXCOutSegmentIndex
Srinivasan, et al. Standards Track [Page 35]
RFC 3813 MPLS LSR MIB June 2004
LSPs originating at this LSR:
These are represented by using the special
of value of mplsXCInSegmentIndex set to the
string containing a single octet 0x00. In
this case the mplsXCOutSegmentIndex
MUST not be the string containing a single
octet 0x00.
LSPs terminating at this LSR:
These are represented by using the special value
mplsXCOutSegmentIndex set to the string containing
a single octet 0x00.
Special labels:
Entries indexed by the strings containing the
reserved MPLS label values as a single octet 0x00
through 0x0f (inclusive) imply LSPs terminating at
this LSR. Note that situations where LSPs are
terminated with incoming label equal to the string
containing a single octet 0x00 can be distinguished
from LSPs originating at this LSR because the
mplsXCOutSegmentIndex equals the string containing the
single octet 0x00.
An entry can be created by a network administrator
or by an SNMP agent as instructed by an MPLS
signaling protocol."
INDEX { mplsXCIndex, mplsXCInSegmentIndex,
mplsXCOutSegmentIndex }
::= { mplsXCTable 1 }
MplsXCEntry ::= SEQUENCE {
mplsXCIndex MplsIndexType,
mplsXCInSegmentIndex MplsIndexType,
mplsXCOutSegmentIndex MplsIndexType,
mplsXCLspId MplsLSPID,
mplsXCLabelStackIndex MplsIndexType,
mplsXCOwner MplsOwner ,
mplsXCRowStatus RowStatus,
mplsXCStorageType StorageType,
mplsXCAdminStatus INTEGER,
mplsXCOperStatus INTEGER
}
mplsXCIndex OBJECT-TYPE
SYNTAX MplsIndexType
MAX-ACCESS not-accessible
STATUS current
Srinivasan, et al. Standards Track [Page 36]
RFC 3813 MPLS LSR MIB June 2004
DESCRIPTION
"Primary index for the conceptual row identifying a
group of cross-connect segments. The string
containing a single octet 0x00 is an invalid index."
::= { mplsXCEntry 1 }
mplsXCInSegmentIndex OBJECT-TYPE
SYNTAX MplsIndexType
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Incoming label index.
If this object is set to the string containing
a single octet 0x00, this indicates a special
case outlined in the table's description above.
In this case no corresponding mplsInSegmentEntry
shall exist."
::= { mplsXCEntry 2 }
mplsXCOutSegmentIndex OBJECT-TYPE
SYNTAX MplsIndexType
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Index of out-segment for LSPs not terminating on
this LSR if not set to the string containing the
single octet 0x00. If the segment identified by this
entry is terminating, then this object MUST be set to
the string containing a single octet 0x00 to indicate
that no corresponding mplsOutSegmentEntry shall
exist."
::= { mplsXCEntry 3 }
mplsXCLspId OBJECT-TYPE
SYNTAX MplsLSPID
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This value identifies the label switched path that
this cross-connect entry belongs to. This object
cannot be modified if mplsXCRowStatus is active(1)
except for this object."
::= { mplsXCEntry 4 }
mplsXCLabelStackIndex OBJECT-TYPE
SYNTAX MplsIndexType
MAX-ACCESS read-create
STATUS current
Srinivasan, et al. Standards Track [Page 37]
RFC 3813 MPLS LSR MIB June 2004
DESCRIPTION
"Primary index into mplsLabelStackTable identifying a
stack of labels to be pushed beneath the top label.
Note that the top label identified by the out-
segment ensures that all the components of a
multipoint-to-point connection have the same
outgoing label. A value of the string containing the
single octet 0x00 indicates that no labels are to
be stacked beneath the top label.
This object cannot be modified if mplsXCRowStatus is
active(1)."
::= { mplsXCEntry 5 }
mplsXCOwner OBJECT-TYPE
SYNTAX MplsOwner
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Denotes the entity that created and is responsible
for managing this cross-connect."
::= { mplsXCEntry 6 }
mplsXCRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"For creating, modifying, and deleting this row.
When a row in this table has a row in the active(1)
state, no objects in this row except this object
and the mplsXCStorageType can be modified. "
::= { mplsXCEntry 7 }
mplsXCStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable indicates the storage type for this
object. The agent MUST ensure that the associated in
and out segments also have the same StorageType value
and are restored consistently upon system restart.
This value SHOULD be set to permanent(4) if created
as a result of a static LSP configuration.
Conceptual rows having the value 'permanent'
need not allow write-access to any columnar
objects in the row."
Srinivasan, et al. Standards Track [Page 38]
RFC 3813 MPLS LSR MIB June 2004
DEFVAL { volatile }
::= { mplsXCEntry 8 }
mplsXCAdminStatus OBJECT-TYPE
SYNTAX INTEGER {
up(1), -- ready to pass packets
down(2),
testing(3) -- in some test mode
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The desired operational status of this segment."
DEFVAL { up }
::= { mplsXCEntry 9 }
mplsXCOperStatus OBJECT-TYPE
SYNTAX INTEGER {
up(1), -- ready to pass packets
down(2),
testing(3), -- in some test mode
unknown(4), -- status cannot be determined
-- for some reason.
dormant(5),
notPresent(6), -- some component is missing
lowerLayerDown(7) -- down due to the state of
-- lower layer interfaces
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The actual operational status of this cross-
connect."
::= { mplsXCEntry 10 }
-- End of mplsXCTable
-- Label stack table.
mplsMaxLabelStackDepth OBJECT-TYPE
SYNTAX Unsigned32 (1..2147483647)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The maximum stack depth supported by this LSR."
::= { mplsLsrObjects 11 }
Srinivasan, et al. Standards Track [Page 39]
RFC 3813 MPLS LSR MIB June 2004
mplsLabelStackIndexNext OBJECT-TYPE
SYNTAX MplsIndexNextType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object contains the next available value to
be used for mplsLabelStackIndex when creating entries
in the mplsLabelStackTable. The special string
containing the single octet 0x00
indicates that no more new entries can be created
in the relevant table. Agents not allowing managers
to create entries in this table MUST set this value
to the string containing the single octet 0x00."
::= { mplsLsrObjects 12 }
mplsLabelStackTable OBJECT-TYPE
SYNTAX SEQUENCE OF MplsLabelStackEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table specifies the label stack to be pushed
onto a packet, beneath the top label. Entries into
this table are referred to from mplsXCTable."
::= { mplsLsrObjects 13 }
mplsLabelStackEntry OBJECT-TYPE
SYNTAX MplsLabelStackEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table represents one label which is
to be pushed onto an outgoing packet, beneath the
top label. An entry can be created by a network
administrator or by an SNMP agent as instructed by
an MPLS signaling protocol."
INDEX { mplsLabelStackIndex, mplsLabelStackLabelIndex }
::= { mplsLabelStackTable 1 }
MplsLabelStackEntry ::= SEQUENCE {
mplsLabelStackIndex MplsIndexType,
mplsLabelStackLabelIndex Unsigned32,
mplsLabelStackLabel MplsLabel,
mplsLabelStackLabelPtr RowPointer,
mplsLabelStackRowStatus RowStatus,
mplsLabelStackStorageType StorageType
}
mplsLabelStackIndex OBJECT-TYPE
Srinivasan, et al. Standards Track [Page 40]
RFC 3813 MPLS LSR MIB June 2004
SYNTAX MplsIndexType
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Primary index for this row identifying a stack of
labels to be pushed on an outgoing packet, beneath
the top label. An index containing the string with
a single octet 0x00 MUST not be used."
::= { mplsLabelStackEntry 1 }
mplsLabelStackLabelIndex OBJECT-TYPE
SYNTAX Unsigned32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Secondary index for this row identifying one label
of the stack. Note that an entry with a smaller
mplsLabelStackLabelIndex would refer to a label
higher up the label stack and would be popped at a
downstream LSR before a label represented by a
higher mplsLabelStackLabelIndex at a downstream
LSR."
::= { mplsLabelStackEntry 2 }
mplsLabelStackLabel OBJECT-TYPE
SYNTAX MplsLabel
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The label to pushed."
::= { mplsLabelStackEntry 3 }
mplsLabelStackLabelPtr OBJECT-TYPE
SYNTAX RowPointer
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"If the label for this segment cannot be represented
fully within the mplsLabelStackLabel object,
this object MUST point to the first accessible
column of a conceptual row in an external table containing
the label. In this case, the mplsLabelStackLabel
object SHOULD be set to 0 and ignored. This object
MUST be set to zeroDotZero otherwise."
DEFVAL { zeroDotZero }
::= { mplsLabelStackEntry 4 }
mplsLabelStackRowStatus OBJECT-TYPE
Srinivasan, et al. Standards Track [Page 41]
RFC 3813 MPLS LSR MIB June 2004
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"For creating, modifying, and deleting this row.
When a row in this table has a row in the active(1)
state, no objects in this row except this object
and the mplsLabelStackStorageType can be modified."
::= { mplsLabelStackEntry 5 }
mplsLabelStackStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable indicates the storage type for this
object. This object cannot be modified if
mplsLabelStackRowStatus is active(1).
No objects are required to be writable for
rows in this table with this object set to
permanent(4).
The agent MUST ensure that all related entries
in this table retain the same value for this
object. Agents MUST ensure that the storage type
for all entries related to a particular mplsXCEntry
retain the same value for this object as the
mplsXCEntry's StorageType."
DEFVAL { volatile }
::= { mplsLabelStackEntry 6 }
-- End of mplsLabelStackTable
-- Begin mplsInSegmentMapTable
mplsInSegmentMapTable OBJECT-TYPE
SYNTAX SEQUENCE OF MplsInSegmentMapEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table specifies the mapping from the
mplsInSegmentIndex to the corresponding
mplsInSegmentInterface and mplsInSegmentLabel
objects. The purpose of this table is to
provide the manager with an alternative
means by which to locate in-segments."
::= { mplsLsrObjects 14 }
Srinivasan, et al. Standards Track [Page 42]
RFC 3813 MPLS LSR MIB June 2004
mplsInSegmentMapEntry OBJECT-TYPE
SYNTAX MplsInSegmentMapEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table represents one interface
and incoming label pair.
In cases where the label cannot fit into the
mplsInSegmentLabel object, the mplsInSegmentLabelPtr
will indicate this by being set to the first accessible
column in the appropriate extension table's row,
and the mplsInSegmentLabel SHOULD be set to 0.
In all other cases when the label is
represented within the mplsInSegmentLabel object, the
mplsInSegmentLabelPtr MUST be 0.0.
Implementors need to be aware that if the value of
the mplsInSegmentMapLabelPtrIndex (an OID) has more
that 111 sub-identifiers, then OIDs of column
instances in this table will have more than 128
sub-identifiers and cannot be accessed using SNMPv1,
SNMPv2c, or SNMPv3."
INDEX { mplsInSegmentMapInterface,
mplsInSegmentMapLabel,
mplsInSegmentMapLabelPtrIndex }
::= { mplsInSegmentMapTable 1 }
MplsInSegmentMapEntry ::= SEQUENCE {
mplsInSegmentMapInterface InterfaceIndexOrZero,
mplsInSegmentMapLabel MplsLabel,
mplsInSegmentMapLabelPtrIndex RowPointer,
mplsInSegmentMapIndex MplsIndexType
}
mplsInSegmentMapInterface OBJECT-TYPE
SYNTAX InterfaceIndexOrZero
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This index contains the same value as the
mplsInSegmentIndex in the mplsInSegmentTable."
::= { mplsInSegmentMapEntry 1 }
mplsInSegmentMapLabel OBJECT-TYPE
SYNTAX MplsLabel
MAX-ACCESS not-accessible
STATUS current
Srinivasan, et al. Standards Track [Page 43]
RFC 3813 MPLS LSR MIB June 2004
DESCRIPTION
"This index contains the same value as the
mplsInSegmentLabel in the mplsInSegmentTable."
::= { mplsInSegmentMapEntry 2 }
mplsInSegmentMapLabelPtrIndex OBJECT-TYPE
SYNTAX RowPointer
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This index contains the same value as the
mplsInSegmentLabelPtr.
If the label for the InSegment cannot be represented
fully within the mplsInSegmentLabel object,
this index MUST point to the first accessible
column of a conceptual row in an external table containing
the label. In this case, the mplsInSegmentTopLabel
object SHOULD be set to 0 and ignored. This object MUST
be set to zeroDotZero otherwise."
::= { mplsInSegmentMapEntry 3 }
mplsInSegmentMapIndex OBJECT-TYPE
SYNTAX MplsIndexType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The mplsInSegmentIndex that corresponds
to the mplsInSegmentInterface and
mplsInSegmentLabel, or the mplsInSegmentInterface
and mplsInSegmentLabelPtr, if applicable.
The string containing the single octet 0x00
MUST not be returned."
::= { mplsInSegmentMapEntry 4 }
-- End mplsInSegmentMapTable
-- Notification Configuration
mplsXCNotificationsEnable OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"If this object is set to true(1), then it enables
the emission of mplsXCUp and mplsXCDown
notifications; otherwise these notifications are not
Srinivasan, et al. Standards Track [Page 44]
RFC 3813 MPLS LSR MIB June 2004
emitted."
REFERENCE
"See also RFC3413 for explanation that
notifications are under the ultimate control of the
MIB module in this document."
DEFVAL { false }
::= { mplsLsrObjects 15 }
-- Cross-connect.
mplsXCUp NOTIFICATION-TYPE
OBJECTS { mplsXCOperStatus, -- start of range
mplsXCOperStatus -- end of range
}
STATUS current
DESCRIPTION
"This notification is generated when the
mplsXCOperStatus object for one or more contiguous
entries in mplsXCTable are about to enter the up(1)
state from some other state. The included values of
mplsXCOperStatus MUST both be set equal to this
new state (i.e: up(1)). The two instances of
mplsXCOperStatus in this notification indicate the range
of indexes that are affected. Note that all the indexes
of the two ends of the range can be derived from the
instance identifiers of these two objects. For
cases where a contiguous range of cross-connects
have transitioned into the up(1) state at roughly
the same time, the device SHOULD issue a single
notification for each range of contiguous indexes in
an effort to minimize the emission of a large number
of notifications. If a notification has to be
issued for just a single cross-connect entry, then
the instance identifier (and values) of the two
mplsXCOperStatus objects MUST be the identical."
::= { mplsLsrNotifications 1 }
mplsXCDown NOTIFICATION-TYPE
OBJECTS {
mplsXCOperStatus, -- start of range
mplsXCOperStatus -- end of range
}
STATUS current
DESCRIPTION
"This notification is generated when the
mplsXCOperStatus object for one or more contiguous
entries in mplsXCTable are about to enter the
down(2) state from some other state. The included values
Srinivasan, et al. Standards Track [Page 45]
RFC 3813 MPLS LSR MIB June 2004
of mplsXCOperStatus MUST both be set equal to this
down(2) state. The two instances of mplsXCOperStatus
in this notification indicate the range of indexes
that are affected. Note that all the indexes of the
two ends of the range can be derived from the
instance identifiers of these two objects. For
cases where a contiguous range of cross-connects
have transitioned into the down(2) state at roughly
the same time, the device SHOULD issue a single
notification for each range of contiguous indexes in
an effort to minimize the emission of a large number
of notifications. If a notification has to be
issued for just a single cross-connect entry, then
the instance identifier (and values) of the two
mplsXCOperStatus objects MUST be identical."
::= { mplsLsrNotifications 2 }
-- End of notifications.
-- Module compliance.
mplsLsrGroups
OBJECT IDENTIFIER ::= { mplsLsrConformance 1 }
mplsLsrCompliances
OBJECT IDENTIFIER ::= { mplsLsrConformance 2 }
-- Compliance requirement for fully compliant implementations.
mplsLsrModuleFullCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION "Compliance statement for agents that provide full
support for MPLS-LSR-STD-MIB. Such devices can
then be monitored and also be configured using
this MIB module."
MODULE IF-MIB -- The Interfaces Group MIB, RFC 2863.
MANDATORY-GROUPS {
ifGeneralInformationGroup,
ifCounterDiscontinuityGroup
}
MODULE -- This module.
MANDATORY-GROUPS {
mplsInterfaceGroup,
mplsInSegmentGroup,
mplsOutSegmentGroup,
Srinivasan, et al. Standards Track [Page 46]
RFC 3813 MPLS LSR MIB June 2004
mplsXCGroup,
mplsPerfGroup
}
GROUP mplsLabelStackGroup
DESCRIPTION "This group is only mandatory for LSRs that wish to
support the modification of LSP label stacks.
"
GROUP mplsHCInSegmentPerfGroup
DESCRIPTION "This group is mandatory for those in-segment entries
for which the object mplsInSegmentOutOctets wraps
around too quickly based on the criteria specified in
RFC 2863 for high-capacity counters.
"
GROUP mplsHCOutSegmentPerfGroup
DESCRIPTION "This group is mandatory for those out-segment entries
for which the object mplsOutSegmentPerfOctets wraps
around too quickly based on the criteria specified in
RFC 2863 for high-capacity counters.
"
GROUP mplsLsrNotificationGroup
DESCRIPTION "This group is only mandatory for those implementations
which can efficiently implement the notifications
contained in this group."
OBJECT mplsInSegmentRowStatus
SYNTAX RowStatus { active(1), notInService(2) }
WRITE-SYNTAX RowStatus { active(1), notInService(2),
createAndGo(4), destroy(6)
}
DESCRIPTION "Support for createAndWait and notReady is
not required."
OBJECT mplsOutSegmentNextHopAddrType
SYNTAX InetAddressType { unknown(0), ipv4(1), ipv6(2) }
DESCRIPTION "Only unknown(0), ipv4(1) and ipv6(2) support
is required."
OBJECT mplsOutSegmentNextHopAddr
SYNTAX InetAddress (SIZE(0|4|16))
DESCRIPTION "An implementation is only required to support
unknown(0), ipv4(1) and ipv6(2) sizes."
OBJECT mplsOutSegmentRowStatus
SYNTAX RowStatus { active(1), notInService(2) }
Srinivasan, et al. Standards Track [Page 47]
RFC 3813 MPLS LSR MIB June 2004
WRITE-SYNTAX RowStatus { active(1), notInService(2),
createAndGo(4), destroy(6)
}
DESCRIPTION "Support for createAndWait and notReady is not
required."
OBJECT mplsLabelStackRowStatus
SYNTAX RowStatus { active(1), notInService(2) }
WRITE-SYNTAX RowStatus { active(1), notInService(2),
createAndGo(4), destroy(6)
}
DESCRIPTION "Support for createAndWait and notReady is not
required."
OBJECT mplsXCRowStatus
SYNTAX RowStatus { active(1), notInService(2) }
WRITE-SYNTAX RowStatus { active(1), notInService(2),
createAndGo(4), destroy(6)
}
DESCRIPTION "Support for createAndWait and notReady is not
required."
::= { mplsLsrCompliances 1 }
-- Compliance requirement for read-only implementations.
mplsLsrModuleReadOnlyCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION "Compliance requirement for implementations that only
provide read-only support for MPLS-LSR-STD-MIB. Such
devices can then be monitored but cannot be configured
using this MIB module.
"
MODULE IF-MIB -- The interfaces Group MIB, RFC 2863
MANDATORY-GROUPS {
ifGeneralInformationGroup,
ifCounterDiscontinuityGroup
}
MODULE -- This module
MANDATORY-GROUPS {
mplsInterfaceGroup,
mplsInSegmentGroup,
mplsOutSegmentGroup,
mplsXCGroup,
mplsPerfGroup
}
Srinivasan, et al. Standards Track [Page 48]
RFC 3813 MPLS LSR MIB June 2004
GROUP mplsLabelStackGroup
DESCRIPTION "This group is only mandatory for LSRs that wish to
support the modification of LSP label stacks.
"
GROUP mplsHCInSegmentPerfGroup
DESCRIPTION "This group is mandatory for those in-segment entries
for which the object mplsInSegmentOutOctets wraps
around too quickly based on the criteria specified in
RFC 2863 for high-capacity counters.
"
GROUP mplsHCOutSegmentPerfGroup
DESCRIPTION "This group is mandatory for those out-segment entries
for which the object mplsOutSegmentPerfOctets wraps
around too quickly based on the criteria specified in
RFC 2863 for high-capacity counters.
"
GROUP mplsLsrNotificationGroup
DESCRIPTION "This group is only mandatory for those implementations
which can efficiently implement the notifications
contained in this group.
"
-- mplsInSegmentTable
OBJECT mplsInSegmentLabel
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsInSegmentLabelPtr
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsInSegmentNPop
SYNTAX Integer32 (1..1)
MIN-ACCESS read-only
DESCRIPTION "Write access is not required. This object
SHOULD be set to 1 if it is read-only.
"
OBJECT mplsInSegmentAddrFamily
MIN-ACCESS read-only
DESCRIPTION "Write access is not required. A value of other(0)
should be supported because there may be cases where
the agent may not know about or support any address
types.
"
Srinivasan, et al. Standards Track [Page 49]
RFC 3813 MPLS LSR MIB June 2004
OBJECT mplsInSegmentRowStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsInSegmentStorageType
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
-- mplsOutSegmentTable
OBJECT mplsOutSegmentInterface
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsOutSegmentPushTopLabel
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsOutSegmentTopLabel
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsOutSegmentTopLabelPtr
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsOutSegmentNextHopAddrType
SYNTAX InetAddressType { unknown(0), ipv4(1), ipv6(2) }
MIN-ACCESS read-only
DESCRIPTION "Write access is not required. Only unknown(0),
ipv4(1) and ipv6(2) support is required.
"
OBJECT mplsOutSegmentNextHopAddr
SYNTAX InetAddress (SIZE(0|4|16))
MIN-ACCESS read-only
DESCRIPTION "Write access is not required. An implementation is
only required to support unknown(0), ipv4(1) and
ipv6(2) sizes."
OBJECT mplsOutSegmentRowStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsOutSegmentStorageType
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
Srinivasan, et al. Standards Track [Page 50]
RFC 3813 MPLS LSR MIB June 2004
-- mplsXCTable
OBJECT mplsXCLabelStackIndex
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsXCAdminStatus
MIN-ACCESS read-only
DESCRIPTION "Read only support is required."
OBJECT mplsXCRowStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsXCStorageType
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsLabelStackLabel
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsLabelStackLabelPtr
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsLabelStackRowStatus
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsLabelStackStorageType
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
::= { mplsLsrCompliances 2 }
-- Units of conformance.
mplsInterfaceGroup OBJECT-GROUP
OBJECTS {
mplsInterfaceLabelMinIn,
mplsInterfaceLabelMaxIn,
mplsInterfaceLabelMinOut,
mplsInterfaceLabelMaxOut,
mplsInterfaceTotalBandwidth,
mplsInterfaceAvailableBandwidth,
mplsInterfaceLabelParticipationType
}
Srinivasan, et al. Standards Track [Page 51]
RFC 3813 MPLS LSR MIB June 2004
STATUS current
DESCRIPTION
"Collection of objects needed for MPLS interface
and interface performance information."
::= { mplsLsrGroups 1 }
mplsInSegmentGroup OBJECT-GROUP
OBJECTS {
mplsInSegmentIndexNext,
mplsInSegmentInterface,
mplsInSegmentLabel,
mplsInSegmentLabelPtr,
mplsInSegmentNPop,
mplsInSegmentAddrFamily,
mplsInSegmentXCIndex,
mplsInSegmentOwner,
mplsInSegmentRowStatus,
mplsInSegmentStorageType,
mplsInSegmentTrafficParamPtr,
mplsInSegmentMapIndex
}
STATUS current
DESCRIPTION
"Collection of objects needed to implement an in-
segment."
::= { mplsLsrGroups 2 }
mplsOutSegmentGroup OBJECT-GROUP
OBJECTS {
mplsOutSegmentIndexNext,
mplsOutSegmentInterface,
mplsOutSegmentPushTopLabel,
mplsOutSegmentTopLabel,
mplsOutSegmentTopLabelPtr,
mplsOutSegmentNextHopAddrType,
mplsOutSegmentNextHopAddr,
mplsOutSegmentXCIndex,
mplsOutSegmentOwner,
mplsOutSegmentPerfOctets,
mplsOutSegmentPerfDiscards,
mplsOutSegmentPerfErrors,
mplsOutSegmentRowStatus,
mplsOutSegmentStorageType,
mplsOutSegmentTrafficParamPtr
}
STATUS current
DESCRIPTION
"Collection of objects needed to implement an out-
Srinivasan, et al. Standards Track [Page 52]
RFC 3813 MPLS LSR MIB June 2004
segment."
::= { mplsLsrGroups 3 }
mplsXCGroup OBJECT-GROUP
OBJECTS {
mplsXCIndexNext,
mplsXCLspId,
mplsXCLabelStackIndex,
mplsXCOwner,
mplsXCStorageType,
mplsXCAdminStatus,
mplsXCOperStatus,
mplsXCRowStatus,
mplsXCNotificationsEnable
}
STATUS current
DESCRIPTION
"Collection of objects needed to implement a
cross-connect entry."
::= { mplsLsrGroups 4 }
mplsPerfGroup OBJECT-GROUP
OBJECTS {
mplsInSegmentPerfOctets,
mplsInSegmentPerfPackets,
mplsInSegmentPerfErrors,
mplsInSegmentPerfDiscards,
mplsInSegmentPerfDiscontinuityTime,
mplsOutSegmentPerfOctets,
mplsOutSegmentPerfPackets,
mplsOutSegmentPerfDiscards,
mplsOutSegmentPerfDiscontinuityTime,
mplsInterfacePerfInLabelsInUse,
mplsInterfacePerfInLabelLookupFailures,
mplsInterfacePerfOutFragmentedPkts,
mplsInterfacePerfOutLabelsInUse
}
STATUS current
DESCRIPTION
"Collection of objects providing performance
information
about an LSR."
::= { mplsLsrGroups 5 }
mplsHCInSegmentPerfGroup OBJECT-GROUP
OBJECTS { mplsInSegmentPerfHCOctets }
STATUS current
Srinivasan, et al. Standards Track [Page 53]
RFC 3813 MPLS LSR MIB June 2004
DESCRIPTION
"Object(s) providing performance information
specific to out-segments for which the object
mplsInterfaceInOctets wraps around too quickly."
::= { mplsLsrGroups 6 }
mplsHCOutSegmentPerfGroup OBJECT-GROUP
OBJECTS { mplsOutSegmentPerfHCOctets }
STATUS current
DESCRIPTION
"Object(s) providing performance information
specific to out-segments for which the object
mplsInterfaceOutOctets wraps around too
quickly."
::= { mplsLsrGroups 7 }
mplsLabelStackGroup OBJECT-GROUP
OBJECTS {
mplsLabelStackLabel,
mplsLabelStackLabelPtr,
mplsLabelStackRowStatus,
mplsLabelStackStorageType,
mplsMaxLabelStackDepth,
mplsLabelStackIndexNext
}
STATUS current
DESCRIPTION
"Objects needed to support label stacking."
::= { mplsLsrGroups 8 }
mplsLsrNotificationGroup NOTIFICATION-GROUP
NOTIFICATIONS {
mplsXCUp,
mplsXCDown
}
STATUS current
DESCRIPTION
"Set of notifications implemented in this
module."
::= { mplsLsrGroups 9 }
END
Srinivasan, et al. Standards Track [Page 54]
RFC 3813 MPLS LSR MIB June 2004
11. Security Considerations
It is clear that this MIB module is potentially useful for monitoring
of MPLS LSRs. This MIB can also be used for configuration of certain
objects, and anything that can be configured can be incorrectly
configured, with potentially disastrous results.
There are a number of management objects defined in this MIB module
with a MAX-ACCESS clause of read-write and/or read-create. Such
objects may be considered sensitive or vulnerable in some network
environments. The support for SET operations in a non-secure
environment without proper protection can have a negative effect on
network operations. These are the tables and objects and their
sensitivity/vulnerability:
o the mplsLsrInSegmentTable, mplsLsrOutSegmentTable, mplsXCTable,
mplsOutSegmentPerfTable, mplsInterfacePerfTable, and
mplsInSegmentPerfTable collectively contain objects to provision
MPLS interfaces, LSPs and their associated parameters on an Label
Switching Router (LSR). Unauthorized access to objects in these
tables, could result in disruption of traffic on the network.
This is especially true if an LSP has been established. The use
of stronger mechanisms such as SNMPv3 security should be
considered where possible. Specifically, SNMPv3 VACM and USM MUST
be used with any v3 agent which implements this MIB module.
Administrators should consider whether read access to these
objects should be allowed, since read access may be undesirable
under certain circumstances.
Some of the readable objects in this MIB module "i.e., objects with a
MAX-ACCESS other than not-accessible" may be considered sensitive or
vulnerable in some network environments. It is thus important to
control even GET and/or NOTIFY access to these objects and possibly
to even encrypt the values of these objects when sending them over
the network via SNMP. These are the tables and objects and their
sensitivity/vulnerability:
o the mplsLsrInSegmentTable, mplsLsrOutSegmentTable, mplsXCTable,
mplsOutSegmentPerfTable, mplsInterfacePerfTable, and
mplsInSegmentPerfTable collectively show the LSP network topology
and its performance characteristics. If an Administrator does not
want to reveal this information, then these tables should be
considered sensitive/vulnerable.
Srinivasan, et al. Standards Track [Page 55]
RFC 3813 MPLS LSR MIB June 2004
SNMP versions prior to SNMPv3 did not include adequate security.
Even if the network itself is secure "for example by using IPSec",
even then, there is no control as to who on the secure network is
allowed to access and GET/SET "read/change/create/delete" the objects
in this MIB module.
It is RECOMMENDED that implementers consider the security features as
provided by the SNMPv3 framework "see [RFC3410], section 8",
including full support for the SNMPv3 cryptographic mechanisms "for
authentication and privacy".
Further, deployment of SNMP versions prior to SNMPv3 is NOT
RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to
enable cryptographic security. It is then a customer/operator
responsibility to ensure that the SNMP entity giving access to an
instance of this MIB module, is properly configured to give access to
the objects only to those principals "users" that have legitimate
rights to indeed GET or SET "change/create/delete" them.
12. Acknowledgments
We wish to thank Ron Bonica, Adrian Farrel, Eric Gray, Tim Mancour,
Keith McCloghrie, Bala Rajagopalan, Dan Tappan, Vasanthi Thirumalai,
Joseph Benoit, Mike Piecuch, Joan Cucchiara. A special thanks to Bert
Wijnen and Mike MacFaden for really getting the MIB module into
shape.
13. IANA Considerations
As described in [MPLSMGMT] and as requested in the MPLS-TC-STD-MIB
[RFC3811], MPLS related standards track MIB modules should be rooted
under the mplsStdMIB subtree. There are 4 MPLS MIB Modules contained
in this document, each of the following "IANA Considerations"
subsections requests IANA for a new assignment under the mplsStdMIB
subtree. New assignments can only be made via a Standards Action as
specified in [RFC2434].
13.1. IANA Considerations for MPLS-LSR-STD-MIB
The IANA has assigned { mplsStdMIB 2 } to the MPLS-LSR-STD-MIB module
specified in this document.
Srinivasan, et al. Standards Track [Page 56]
RFC 3813 MPLS LSR MIB June 2004
14. References
14.1. Normative References
[RFC2119] Bradner, S., "Key Words for use in RFCs to Indicate
Requirement Levels", RFC 2119, BCP 14, March 1997.
[RFC2515] Tesink, K., Ed., "Definitions of Managed Objects for
ATM Management", RFC 2515, February 1999.
[RFC2578] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Structure of Management Information Version 2
(SMIv2)", STD 58, RFC 2578, April 1999.
[RFC2579] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Textual Conventions for SMIv2", STD 58, RFC 2579,
April 1999.
[RFC2580] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Conformance Statements for SMIv2", STD 58, RFC 2580,
April 1999.
[RFC2863] McCloghrie, K. and F. Kastenholz, "The Interfaces Group
MIB", RFC 2863, June 2000.
[RFC3031] Rosen, E., Viswanathan, A., and R. Callon,
"Multiprotocol Label Switching Architecture", RFC 3031,
January 2001.
[RFC3291] Daniele, M., Haberman, B., Routhier, S., and J.
Schoenwaelder, "Textual Conventions for Internet
Network Addresses", RFC 3291, May 2002.
[RFC3411] Harrington, D., Presuhn, R., and B. Wijnen, "An
Architecture for Describing Simple Network Management
Protocol (SNMP) Management Frameworks", STD 62, RFC
3411, December 2002.
[RFC3811] Nadeau, T. and J. Cucchiara, Eds., "Definition of
Textual Conventions (TCs) for Multiprotocol Label
Switching (MPLS) Management", RFC 3811, June 2004.
[RFC3812] Srinivasan, C., Viswanathan, A., and T. Nadeau,
"Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB)",
RFC 3812, June 2004.
Srinivasan, et al. Standards Track [Page 57]
RFC 3813 MPLS LSR MIB June 2004
[IANAFamiy] Internet Assigned Numbers Authority (IANA), ADDRESS
FAMILY NUMBERS,
(http://www.iana.org/assignments/address-family-
numbers), for MIB see:
http://www.iana.org/assignments/
ianaaddressfamilynumbers-mib
14.2. Informative References
[MPLSMGMT] Nadeau, T., Srinivasan, C., and A. Farrel,
"Multiprotocol Label Switching (MPLS) Management
Overview", Work in Progress, September 2003.
[RFC2434] Narten, T. and H. Alvestrand, "Guidelines for Writing
an IANA Considerations Section in RFCs", BCP 26, RFC
2434, October 1998.
[RFC3413] Levi, D., Meyer, P. and B. Stewart, "Simple Network
Management Protocol (SNMP) Applications", STD 62, RFC
3413, December 2002.
[RFC3410] Case, J., Mundy, R., Partain, D. and B. Stewart,
"Introduction and Applicability Statements for
Internet-Standard Management Framework", RFC 3410,
December 2002.
Srinivasan, et al. Standards Track [Page 58]
RFC 3813 MPLS LSR MIB June 2004
15. Authors' Addresses
Cheenu Srinivasan
Bloomberg L.P.
499 Park Ave., New York, NY 10022
Phone: +1-212-893-3682
EMail: cheenu@bloomberg.net
Arun Viswanathan
Force10 Networks, Inc.
1440 McCarthy Blvd
Milpitas, CA 95035
Phone: +1-408-571-3516
EMail: arunv@force10networks.com
Thomas D. Nadeau
Cisco Systems, Inc.
300 Beaver Brook Road
Boxboro, MA 01719
Phone: +1-978-936-1470
EMail: tnadeau@cisco.com
Srinivasan, et al. Standards Track [Page 59]
RFC 3813 MPLS LSR MIB June 2004
16. Full Copyright Statement
Copyright (C) The Internet Society (2004). This document is subject
to the rights, licenses and restrictions contained in BCP 78, and
except as set forth therein, the authors retain all their rights.
This document and the information contained herein are provided on an
"AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Intellectual Property
The IETF takes no position regarding the validity or scope of any
Intellectual Property Rights or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; nor does it represent that it has
made any independent effort to identify any such rights. Information
on the procedures with respect to rights in RFC documents can be
found in BCP 78 and BCP 79.
Copies of IPR disclosures made to the IETF Secretariat and any
assurances of licenses to be made available, or the result of an
attempt made to obtain a general license or permission for the use of
such proprietary rights by implementers or users of this
specification can be obtained from the IETF on-line IPR repository at
http://www.ietf.org/ipr.
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights that may cover technology that may be required to implement
this standard. Please address the information to the IETF at ietf-
ipr@ietf.org.
Acknowledgement
Funding for the RFC Editor function is currently provided by the
Internet Society.
Srinivasan, et al. Standards Track [Page 60]
ERRATA
