BGP FRR Protection against Edge Node Failure Using Table Mirroring with Context Labels

Document Type Expired Internet-Draft (individual)
Authors Ahmed Bashandy  , Maciek Konstantynowicz  , Nagendra Nainar 
Last updated 2013-04-11 (latest revision 2012-10-08)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Consider a BGP free core scenario. 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 is desirable for a core router "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/m to one of the other edge routers that advertised P/m, say PEj, until BGP re-converges. This draft proposes a BGP FRR scheme that relies on having the repairing edge router mirror the protected edge router forwarding table. The repairing edge router uses a locally allocated context label to identify the correct mirrored table.


Ahmed Bashandy (
Maciek Konstantynowicz (
Nagendra Nainar (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)