Deprecation of BGP Path Attribute values 30, 31, 129, 241, 242, and 234
NTT Communications
Theodorus Majofskistraat 100
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Amsterdam
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job@ntt.net
Routing
IDR
BGP
This document requests IANA to mark BGP path attribute
values 30, 31, 129, 241, 242, and 243 as "deprecated".
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, 129, 241, 242 and 243 has been
confirmed by the involved vendors or through source code
review.
Per this document, IANA is requested to mark values 30, 31,
129, 241, 242, and 243 as "deprecated" in the "BGP Path
Attributes" registry under the "Border Gateway Protocol (BGP)
Parameters" group. The marking "deprecated" meaning "use is not
recommended" ().
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.