I-D ACTION:draft-csaszar-rtgwg-ipfrr-fn-00.txt
Internet-Drafts@ietf.org Thu, 14 June 2012 16:05 UTC
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Subject: I-D ACTION:draft-csaszar-rtgwg-ipfrr-fn-00.txt
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A new Internet-Draft is available from the on-line Internet-Drafts directories.
Title : IP Fast Re-Route with Fast Notification
Author(s) : A. Csaszar, et al
Filename : draft-csaszar-rtgwg-ipfrr-fn
Pages : 39
Date : June 14, 2012
This document describes the benefits and main applications of sending
explicit fast notification (FN) packets to routers in an area. FN
packets are generated and processed in the dataplane, and a single FN
service can substitute existing OAM methods for remote failure
detection, such as a full mesh of multi-hop BFD session. The FN
service, therefore, decreases network overhead considerable. The main
application is fast reroute in pure IP and in IP/LDP-MPLS networks
called IPFRR-FN. The detour paths used when IPFRR-FN is active are in
most cases identical to those used after Interior Gateway Protocol
(IGP) convergence. The proposed mechanism can address all single
link, node, and SRLG failures in an area; moreover it is an efficient
solution to protect against BGP ASBR failures as well as VPN PE
router failures. IPFRR-FN can be a supplemental tool to provide FRR
when LFA cannot repair a failure case, while it can be a replacement
of existing ASBR/PE protection mechanisms by overcoming their
scalability and complexity issues.
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