Information exchange and tunnel establishment methods, apparatuses, communication nodes, and storage medium

An information exchange method, the method being applied by a second communication node and comprising:

• determining segment routing Internet Protocol version 6 (SRv6) path segment compression information, wherein the SRv6 path segment compression information comprises node construction information of an SRv6 path segment identifier and node behavior information of the SRv6 path segment identifier;
• and
• reporting the SRv6 path segment compression information to a first communication node for the first communication node to send SRv6 path segment compression configuration information to a third communication node according to the SRv6 path segment compression information;
• wherein the node construction information of the SRv6 path segment identifier comprises length information of a locator block of the SRv6 path segment identifier, length information of a locator node of the SRv6 path segment identifier, length information of a function of the SRv6 path segment identifier, length information of arguments of the SRv6 path segment identifier and a compression encapsulation type of the SRv6 path segment identifier;
• and
• the node behavior information of the SRv6 path segment identifier comprises a terminal behavior type and interior gateway protocol (IGP) algorithm type information corresponding to the SRv6 path segment identifier;
• wherein the SRv6 path segment compression configuration information comprises:
• common prefix length information of the SRv6 path segment identifier, length information of a compressed SRv6 path segment identifier and a compression encapsulation type of the SRv6 path segment identifier.

A tunnel establishment method, the method being applied by a third communication node and comprising:

• receiving segment routing Internet Protocol version 6 (SRv6) path segment compression configuration information sent by a first communication node, wherein the SRv6 path segment compression configuration information is sent by the first communication node according to SRv6 path segment compression information reported by a second communication node, and the SRv6 path segment compression information comprises node construction information of an SRv6 path segment identifier and node behavior information of the SRv6 path segment identifier;
• and
• establishing a tunnel with the second communication node according to the SRv6 path segment compression configuration information;
• wherein the node construction information of the SRv6 path segment identifier comprises length information of a locator block of the SRv6 path segment identifier, length information of a locator node of the SRv6 path segment identifier, length information of a function of the SRv6 path segment identifier, length information of arguments of the SRv6 path segment identifier and a compression encapsulation type of the SRv6 path segment identifier;
• wherein the node behavior information of the SRv6 path segment identifier comprises a terminal behavior type of the SRv6 path segment identifier and interior gateway protocol (IGP) algorithm type information corresponding to the SRv6 path segment identifier;
• wherein the SRv6 path segment compression configuration information comprises:
• common prefix length information of the SRv6 path segment identifier, length information of a compressed SRv6 path segment identifier and a compression encapsulation type of the SRv6 path segment identifier.