Network label allocation method, device, and system

A network label allocation method, comprising:

• receiving, by a remote PE, a VPN label route sent by a local PE, wherein the local PE and the remote PE at least belong to a same VPN, and the VPN label route comprises a VPN label different from that of another remote PE;
• matching, by the remote PE separately, an IP address of the remote PE with a target device IP address in the VPN label route, and matching an import route target RT of each virtual routing forwarding VRF of the remote PE with a route target RT in the VPN label route;
• and
• carrying, by the remote PE, the VPN label when sending, to the local PE, a packet related to a successfully matched VRF, so that the local PE distinguishes the packet sent by the remote PE from a packet sent by the another remote PE.

A remote provider edge, comprising:

• a second receiving unit, configured to receive a VPN label route sent by a local PE, wherein the local PE and the remote PE at least belong to a same VPN, and the VPN label route comprises a VPN label different from that of another remote PE;
• a second matching unit, configured to separately match an IP address of the remote PE with a target device IP address in the VPN label route, and match an import route target RT of each virtual routing forwarding VRF of the remote PE with a route target RT in the VPN label route;
• and
• a second sending unit, configured to carry the VPN label when the remote PE sends, to the local PE, a packet related to a successfully matched VRF, so that the local PE distinguishes the packet sent by the remote PE from a packet sent by the another remote PE.