A New Internet-Draft is available from the on-line Internet-Drafts directories. Title : Scalable BGP FRR Protection against Edge Node Failure Author(s) : Ahmed Bashandy Filename : draft-bashandy-bgp-edge-node-frr-01.txt Pages : 17 Date : 2011-10-28 Consider a BGP free core scenario. Suppose the edge BGP speakers PE1, PE2,..., PEn know about a prefix P/p via the external routers CE1, CE2,..., CEm. If the edge router PEi crashes or becomes totally disconnected from the core, it desirable for a penultimate hop route "P" carrying traffic to the failed edge router PEi to immediately restore traffic by re-tunneling packets originally tunneled to PEi and destined to the prefix P/p to one of the other edge routers that advertised P/p, say PEj, until BGP re-converges. In doing so, it is highly desirable to keep the core BGP-free while not imposing restrictions on external connectivity. Thus (1) a core router should not be required to learn any BGP prefix, (2) the size of the forwarding and routing tables in the core routers should be independent of the number of BGP prefixes,(3) there should be no special router (or group of routers) that handles restoring traffic, and (4) there should be no restrictions on what edge routers advertise what prefixes. For labeled prefixes, (5) the penultimate hop router must swap the label advertised by the failed edge router PEi for the prefix P/p with the label advertised for the same prefix by the edge router PEj before re-tunneling the packet to PEj A URL for this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-bashandy-bgp-edge-node-frr-01.txt Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ This Internet-Draft can be retrieved at: ftp://ftp.ietf.org/internet-drafts/draft-bashandy-bgp-edge-node-frr-01.txt _______________________________________________ I-D-Announce mailing list I-D-Announce@ietf.org https://www.ietf.org/mailman/listinfo/i-d-announce Internet-Draft directories: http://www.ietf.org/shadow.html or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
