RFC Errata

Errata Search

Source of RFC  
Summary Table Full Records

RFC 5586, "MPLS Generic Associated Channel", June 2009

Note: This RFC has been updated by RFC 6423, RFC 7026, RFC 7214, RFC 7274

Source of RFC: mpls (rtg)

Errata ID: 4364
Status: Rejected
Type: Technical
Publication Format(s) : TEXT

Reported By: Alexander ("Sasha") Vainshtein
Date Reported: 2015-05-12
Rejected by: Deborah Brungard
Date Rejected: 2015-05-18

Section 4.2.1 says:

   The Time-To-Live (TTL) field of the LSE that contains the GAL follows
   the definition and processing rules specified in [RFC3443].

It should say:

The value of the  Time-To-Live (TTL) field of the LSE that contains the 
GAL follows is irrelevant as long as it exceeds 1. (Setting this value 
to 0 or 1 SHOULD be avoided because it could result in trapping the OAM 
packets in with wrong reason: "TTL expiration" instead of "GAL  


The processing rules specific in RFC 3443 deal with handling TTL in the LSE of a labeled packets that are forwarded based on this LSE, or with setting the TTL value by a LER pushing a label stack on an unlabeled packet.
As per the last para in Section 4.2, LSRs and LERs MUST NOT forward packets based on the LSE that contains GAL, hence these rules are mainly not applicable.
This proposes a change to the RFC which needs to be agreed via working group consensus.

Report New Errata

Advanced Search