Systems and methods for recovery from network changes

摘要

Systems, methods and apparatus for recovery from network changes. In some embodiments, a first network device may operating in a network comprising a second network device having a designated role according to at least one communication protocol. The first network device may detect a change relating to the second network device and determine whether the change is of a type among one or more selected types of changes. The first network device may further determine whether to inhibit operation of the first network device based at least in part on whether the change is of a type among the one or more selected types of changes.

主权项

1. A method for use by at least one first network device attached to a bridged network, the method comprising acts of:
(a) processing a message received via at least one network interface of the at least one first network device to detect a change relating to a root bridge in the bridged network attached to the at least one first network device, the root bridge being a root bridge according to a spanning tree protocol, the message being directed to a port of the at least one first network device; (b) determining whether one or more exceptions are applicable to the change relating to the root bridge, comprising:
determining whether a first exception is applicable to the change relating to the root bridge, the first exception being that the operation of the port of the at least one first network device is not to be inhibited if the change relating to the root bridge involves a priority value for the root bridge being lowered; anddetermining whether a second exception is applicable to the change relating to the root bridge, the second exception being that the operation of the port of the at least one first network device is not to be inhibited if a uniquely identifying portion of an identifier for the root bridge remains unchanged; and (c) if it is determined that no exception is applicable to the change relating to the root bridge, inhibiting operation of the port of the at least one first network device, wherein inhibiting the operation of the port of the at least one first network device comprises:
causing the at least one first network device to ignore at least one native frame received on the port of the at least one first network device, but continue to process TRILL frames; orcausing the at least one first network device not to send at least one native frame on the port of the at least one first network device, but continue to send TRILL frames.