Advertisement of adjacency segment identifiers

摘要

Various techniques can be used to advertise adjacency segment identifiers (IDs) within a segment routing (SR) network. For example, a method, performed by a first node, can involve identifying an adjacency segment between a first node and a second node; assigning an identifier to the adjacency segment; and sending an Intermediate-System-to-Intermediate-System (IS-IS) hello (IIH) message to another node. The adjacency advertisement includes the identifier. If the adjacency segment is part of a LAN, the IIH message can be sent to a designated node that aggregates adjacency segment ID advertisements for the other nodes on the LAN.

主权项

1. A method comprising:
identifying an adjacency segment between a first node and a second node, wherein the identifying is performed by the first node; assigning an adjacency segment identifier (ID) to the adjacency segment, wherein
the assigning is performed by the first node, andthe adjacency segment ID is locally significant to the first node; sending an Intermediate-System-to-Intermediate-System (IS-IS) hello (IIH) message to a third node, wherein
the first node and the third node are both on a local area network (LAN),the sending is performed by the first node,the IIH message comprises the adjacency segment ID, andthe third node is configured to aggregate a plurality of adjacency segment IDs generated by a set of nodes; determining whether the first node comprises a spoke node or a hub node; and in response to determining that the first node comprises the spoke node:
assigning, by the first node, a respective adjacency segment ID for an adjacency with a hub node that is coupled to the LAN; andinhibiting assignment of any adjacency segment ID for an adjacency with an additional spoke node coupled to the LAN.