Technical Summary
This document proposes a mechanism for BGP that would help minimize
the negative effects on routing caused by BGP restart. An End-of-RIB
marker is specified and can be used to convey routing convergence
information. A new BGP capability, termed "Graceful Restart
Capability", is defined which would allow a BGP speaker to express
its ability to preserve forwarding state during BGP restart. Finally,
procedures are outlined for temporarily retaining routing information
across a TCP transport reset.
The mechanisms described in this document are applicable to all
routers, both those with the ability to preserve forwarding state
during BGP restart and those without (although the latter need to
implement only a subset of the mechanisms described in this
document).
Working Group Summary
The WG had consensus to move this document forward. There
were comments during IETF Last Call, and the document was
updated based on these comments.
Protocol Quality
Bill Fenner reviewed this spec for the IESG. The implementation
report, listing 7 implementations, is available at
http://www.ietf.org/IESG/Implementations/implement_draft-ietf-idr-bgp-gr-survey-01.txt