IS-IS Extension for BGP FRR Protection against Edge Node Failure
draft-bashandy-isis-bgp-edge-node-frr-00
| Document | Type |
This is an older version of an Internet-Draft whose latest revision state is "Expired".
Expired & archived
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| Author | Ahmed Bashandy | ||
| Last updated | 2012-09-06 (Latest revision 2012-03-05) | ||
| RFC stream | (None) | ||
| Formats | |||
| Additional resources | |||
| Stream | Stream state | (No stream defined) | |
| Consensus boilerplate | Unknown | ||
| RFC Editor Note | (None) | ||
| IESG | IESG state | Expired | |
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:
Abstract
Consider a BGP free core scenario where traffic is tunneled between edge routers. Suppose the edge BGP speakers PE1, PE2,..., PEn know about a prefix P/m via the external routers CE1, CE2,..., CEm. If the edge router PEi crashes or becomes totally disconnected from the core, it desirable for a core router "P" that is carrying traffic to the failed edge router PEi to immediately restore traffic by re- routing packets originally tunneled to PEi and destined to the prefix P/m to one of the other edge routers that advertised P/m, say PEj, until BGP re-converges. If the packets originally flowing to the failed edge router PEi are labeled, then the repairing core router P router must swap the label advertised by the failed edge router PEi for the prefix P/m with the label advertised for the same prefix by the edge router PEj before re-routing the packet through an LSP terminating PEj. The document proposes an extension to IS-IS protocol to inform core routers about the repair edge router PEj and, for labeled packets, the label that needs to be pushed/swapped before sending the packet into the tunnel terminating on PEj
Authors
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)