Forwarding packets

摘要

A service instance in a BEB device is allocated B-VLANs. Each of the B-VLANs may be mapped to a different ECT algorithm. For each B-VLAN of the service instance, BEB device calculates a forwarding path between the BEB device and a remote BEB device to obtain different forwarding paths for different B-VLANs of the service instance. The BEB device forwards a data flow in a first forwarding path of the service instance, and switches the data flow from the first forwarding path to a second forwarding path of the service instance if a link failure is detected in the first forwarding path.

主权项

1. A method comprising:
calculating a first forwarding path between a Backbone Edge Bridge (BEB) device and a remote BEB device for a first Backbone VLAN (B-VLAN) allocated to a service instance using a first Equal Cost Tree (ECT) algorithm and Link State PDU (LSP) information; calculating a second forwarding path between the BEB device and the remote BEB device for a second B-VLAN allocated to the service instance using a second ECT algorithm and the LSP information; detecting a link failure in the first forwarding path; and in response to detecting the link failure, switching a data flow from the first forwarding path to the second forwarding path, wherein calculating the first forwarding path and calculating the second forwarding path comprise: allocating a unicast Pseudo Wire (PW) group for the remote BEB device, generating a first unicast PW in the unicast PW group for the first B-VLAN, generating a second unicast PW in the unicast PW group for the second B-VLAN, issuing a PW table entry for each of the first and second unicast PWs to a unicast PW table, wherein issuing the PW table entry for each of the first and second unicast PWs to the unicast PW table, comprises:
issuing a first unicast PW table entry for the first unicast PW to the unicast PW table, the first unicast PW table entry comprising a unicast PW group ID of the unicast PW group; andissuing a second unicast PW table entry of the second unicast PW to the unicast PW table, the second unicast PW table entry comprising the unicast PW group ID, setting a first sending and receiving attribute of the first unicast PW, and setting a second sending and receiving attribute of the second unicast PW.