Segment Routing SRv6 S-BFD and ping replies having deterministic reply path

Abstract: systems and methods for providing a deterministic reply path in a segment routing over internet protocol version 6 (srv6) network include transmitting, from a sending node, a monitoring request packet that includes information defining both a forward path and a reply path through the srv6 network, wherein the reply path information is embedded in the monitoring request packet to enable a receiving node to return a reply along a predetermined path specified by the sending node. in an embodiment, the monitoring request packet includes a seamless bidirectional forwarding detection (s-bfd) or bidirectional forwarding detection (bfd) payload for monitoring an srv6 traffic engineering (te) tunnel in the forward direction. in another embodiment, the monitoring request packet includes an internet control message protocol (icmp) packet, and the reply path information is encoded as a type-length-value (tlv) extension in an icmpv6 header.

Inventor(s): Aditya Mittal, Pankaj Verma, Sudipta Das

CPC Classification: H04L45/02 (Topology update or discovery)

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