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PER-PREFIX LFA FRR WITH BIT INDEXED EXPLICIT REPLICATION

  • US 20180278470A1
  • Filed: 05/30/2018
  • Published: 09/27/2018
  • Est. Priority Date: 09/17/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving, at a forwarding node in a network configured for bit indexed forwarding, an advertisement, whereinthe advertisement is received from an egress node of the network, andthe advertisement identifies a mapping of the egress node to a bit position of a packet bit string to be carried by a packet through the network;

    generating or updating a primary entry for the egress node in a bit indexed routing table for the forwarding node, whereinthe primary entry comprises information identifying the bit position, the egress node, and a primary neighbor node for forwarding of a packet to the egress node;

    determining whether a backup entry for the egress node is to be included in the bit indexed routing table; and

    in response to a determination that a backup entry is to be included, generating or updating the backup entry in the bit indexed routing table, whereinthe backup entry comprises information identifying the bit position, the egress node, and a backup neighbor node for forwarding of a packet to the egress node when a path through the primary neighbor node becomes unavailable.

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