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Bit indexed explicit replication using multiprotocol label switching

  • US 10,659,242 B2
  • Filed: 07/31/2018
  • Issued: 05/19/2020
  • Est. Priority Date: 09/17/2013
  • Status: Active Grant
First Claim
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1. A method performed by a node, the method comprising:

  • selecting a bit forwarding table based, at least in part, on information in a received packet, whereinthe bit forwarding table is associated with one or more label values,the received packet comprises a top label and a bit mask, andthe bit forwarding table is selected, at least in part, in response to a determination that the top label of the received packet is associated with a BIER-enabled node;

    selecting a row as a selected row in the bit forwarding table, whereinthe selected row is selected based, at least in part, on a label value identified in the top label and a bit position value corresponding to a first set bit in the bit mask, andthe selected row comprises a routing label associated with a neighbor node;

    copying the received packet to create a copied packet;

    replacing the top label in the copied packet with the routing label from the selected row of the bit forwarding table; and

    forwarding the copied packet to the neighbor node, wherein the forwarding is based, at least in part, on the routing label.

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