Method and network device for distributing multi-protocol label switching labels

A network device, comprising:

• a border gateway protocol, BGP, protocol message receiving unit, a corresponding relationship establishing unit, and an MPLS label distributing unit;
• wherein
• the BGP protocol message receiving unit receives a BGP protocol message transmitted from another network device, the BGP protocol message carrying a service identifier of the another network device;
• the corresponding relationship establishing unit establishes a corresponding relationship between the network device and the another network device according to a service identifier of the network device and the service identifier of the another network device;
• and
• the label distributing unit distributes an MPLS label for the corresponding relationship;
• wherein the corresponding relationship establishing unit comprises a device identifier obtaining subunit, a logic domain identifier obtaining subunit, a logic domain confirming subunit, and a corresponding relationship generating subunit;
• wherein
• the device identifier obtaining subunit obtains a device identifier of the network device itself and a device identifier of the another network device;
• the logic domain identifier obtaining subunit obtains a logic domain identifier of the network device itself and a logic domain identifier of the another network device;
• the logic domain confirming subunit confirms whether the network device and the another network device are located in a same logic domain according to the logic domain identifier of the network device itself and the logic domain identifier of the another network device;
• and
• the corresponding relationship generating subunit associates the device identifier of the network device with the device identifier of the another network device, and establishes a corresponding relationship between the network device and the another network device, after it is determined that the network device and the another network device are located in the same logic domain.

A computer program product, comprising computer executable instructions stored on a non-transitory computer readable medium, wherein when the instructions are executed by a processor of a first provider edge, PE, device, causes the processor to:

• receive a border gateway protocol, BGP, protocol message transmitted from a second PE device, wherein the BGP protocol message carries a service identifier of the second PE device, wherein the service identifier of the second PE device comprises a logic domain identifier of the second PE device and a device identifier of the second PE device;
• determine whether the first PE device and the second PE device are located in a same logic domain according to a logic domain identifier of the first PE device and the logic domain identifier of the second PE device;
• establish, according to a device identifier of the first PE device and the device identifier of the second PE device, a corresponding relationship between the first PE device and the second PE device in response to determining that the first PE device and the second PE device are located in the same logic domain;
• and
• distribute an MPLS label for the corresponding relationship.