A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching Working Group of the IETF.
Title : Graceful Restart Mechanism for BGP with MPLS
Author(s) : Y. Rekhter, R. Aggarwal
Filename : draft-ietf-mpls-bgp-mpls-restart-05.txt
Pages : 11
Date : 2005-8-16
A mechanism for BGP that helps minimize the negative effects on
routing caused by BGP restart has already been developed an is
described in a separate document ("Graceful Restart Mechanism for
BGP"). This document extends this mechanism to also minimize the
negative effects on MPLS forwarding caused by the Label Switching
Router's (LSR's) control plane restart, and specifically by the
restart of its BGP component when BGP is used to carry MPLS labels
and the LSR is capable of preserving the MPLS forwarding state across
the restart.
The mechanism described in this document is agnostic with respect to
the types of the addresses carried in the BGP Network Layer
Reachability Information (NLRI) field. As such it works in
conjunction with any of the address famililies that could be carried
in BGP (e.g., IPv4, IPv6, etc...)
The mechanism described in this document is applicable to all LSRs,
both those with the ability to preserve their forwarding state during
BGP restart and those without (although the latter need to implement
only a subset of the mechanism described in this document).
Supporting a subset of the mechanism described here by the LSRs that
can not preserve their MPLS forwarding state across the restart would
not reduce the negative impact on MPLS traffic caused by their
control plane restart, but it would minimize the impact if their
neighbor(s) are capable of preserving the forwarding state across the
restart of their control plane and implement the mechanism described
here.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-mpls-bgp-mpls-restart-05.txt
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