System and method for preventing loops in the presence of...

Details System and method for preventing loops in the presence of... System and method for preventing loops in the presence of...

2011-03-22

2011-03-22

Ferris, Derrick W (Department: 2463)

Multiplex communications

Fault recovery

Reexamination Certificate

active

07911938

ABSTRACT:
Various systems and methods for preventing loops in the presence of control plane failures are disclosed. For example, one method involves sending a special data packet in response to detection of a break in a network loop and then unblocking a port if the special data packet fails to circumnavigate the network loop. Prior to detection of the break, the port was blocked by a loop prevention protocol, such as a spanning tree protocol. If the special data packet successfully circumnavigates the network loop, the port will not be unblocked.

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patent: WO 03/077459 (2003-09-01), None

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