NTT Communications

Theodorus Majofskistraat 100 1065 SZ Amsterdam NL job@ntt.net

Routing IDR BGP This document requests IANA to deprecate the following BGP path attributes values: 30, 31 and 129.

It has been discovered that certain BGP Path Attribute values have been used in BGP implementations which have been deployed in the wild while not being assigned by the IANA for such usage. This has led to deployment problems for new technologies such as Large BGP Communities . The squatting of values 30, 31 and 129 has been confirmed by the involved vendors.

Per this document, IANA has marked values 30, 31 and 129 as "deprecated" in the "BGP Path Attributes" registry under the "Border Gateway Protocol (BGP) Parameters" group.

There are no meaningful security consequences arising from this registry update.

The author would like to gratefully acknowledge Marlien Vijfhuizen who helped discover the squatting of value 30.