Interior gateway protocol (igp) for segment routing (sr) proxy segment identifiers (sids)

A Proxy Forwarding node configured to enable traffic to be forwarded on a Segment Routing (SR) Traffic Engineering (SR-TE) path after interior gateway protocol (IGP) has converged for a neighboring node along the SR-TE path, the Proxy Forwarding node comprising:

• a memory storing instructions;
• and
• a processor coupled to the memory, the processor configured to execute the instructions to cause the Proxy Forwarding node to:
• advertise SR proxy forwarding capability of the Proxy Forwarding node for neighboring nodes of the Proxy Forwarding node using extensions to interior gateway protocol (IGP);
• determine a failure of the neighboring node along the SR-TE path;
• receive the traffic targeting the failed neighboring node, the traffic including a proxy node segment identifier (SID) of the failed neighboring node;
• and
• forward the traffic towards a destination of the traffic in a direction that avoids the failed neighboring node after the IGP has converged.

A computer program product comprising a non-transitory computer readable storage medium having computer readable program instructions stored thereon, the computer readable program instructions when executed by a processor of a device causes the device to:

• advertise Segment Routing (SR) proxy forwarding capability of a Proxy Forwarding node for neighboring nodes of the Proxy Forwarding node using extensions to interior gateway protocol (IGP);
• determine that a neighboring node along a SR-Traffic Engineering (SR-TE) path has failed;
• receive traffic targeting the failed neighboring node of the Proxy Forwarding node, the traffic including a proxy node segment identifier (SID) of the failed neighboring node;
• and
• forward the traffic towards a destination of the traffic in a direction that avoids the failed neighboring node after the IGP has converged.