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. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" are to be interpreted as described in only when they appear in all upper case. They may also appear in lower or mixed case as English words, without normative meaning.

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 the BGP Path Attributes registry entries for values 30, 31, 129 as "deprecated".

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.