| 摘要 |
Disclosed are a method, device and system for a service link, which provide a solution of a service chain which is easy to be deployed. In some embodiments of the present invention, the method comprises: an intermediate SN receives an extended first border gateway protocol (BGP) packet sent by a downstream SN which is directly adjacent to the intermediate SN on a service chain path, wherein the extended first BGP packet comprises a service chain path identifier and a first service chain path, the service chain path identifier is used for identifying the service chain path, and the first service chain path is a path comprising a service chain path from an entrance SN to the intermediate SN; the intermediate SN determines an upstream SN which is directly adjacent to the intermediate SN on the first service chain path; and the intermediate SN sends an extended second BGP packet to the upstream SN, wherein the extended second BGP packet comprises a service chain path identifier and a second service chain path, and the second service chain path is a path comprising a service chain path from the entrance SN to the upstream SN. |
