Least disruptive AF assignments in TRILL LAN adjacencies

摘要

A methodology is described for achieving efficient forwarder appointments. Such efficient appointment may provide an equal load on each participating routing bridge in the TRILL LAN. Load may be viewed as the number of VLANs for which a given node is an appointed forwarder. Furthermore, efficient appointment may be executed with a minimum of traffic disruption. Minimal disruption may be ensured by forwarder appointments by moving a minimum number of VLANs to ensure an equal load on each participating routing bridge.

主权项

1. A method of assigning appointed forwarders by a network device in a TRILL LAN comprising:
identifying a trigger event, wherein the trigger event is the addition of a new node to the TRILL LAN; determining a number of nodes on the TRILL LAN after the trigger event; determining a number of VLANs enabled by a designated routing bridge; adjusting appointed forwarder status of the nodes to provide equal distribution of VLANs between the nodes; and assigning a threshold number of VLANs from each node to the new node, the threshold being equal to the determined number of VLANs enabled by the designated routing bridge divided by a determined number of nodes prior to the trigger event.