Patent ID: 11936552
Assignee: ZTE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for implementing Virtual Private Network (VPN) cross-domain, comprising:
receiving, by a border node, an advertisement message which carries VPN route information and is sent by a first node to a second node, wherein the border node supports Internet Protocol Version 6 Segment Routing (SRv6) capability, and the first node and the second node belong to different domains; and
assigning, by the border node, VPN identity information to a VPN route corresponding to the VPN route information, adding the VPN identity information into the advertisement message, and sending the advertisement message to the second node, wherein the VPN identity information comprises at least one of: a VPN Segment ID (SID) and a VPN label;
wherein in a case where the VPN identity information comprises the VPN SID, after assigning, by the border node, the VPN identity information to the VPN route corresponding to the VPN route information, the method further comprises:
creating, by the border node, a corresponding local SID forwarding entry for the assigned VPN SID, and setting that a forwarding behavior of the local SID forwarding entry comprises swapping an incoming SRv6 SID to an outgoing SRv6 SID or Multiprotocol Label Switching (MPLS) label.