Futile neighbor state loop prevention in high availability...

Details Futile neighbor state loop prevention in high availability... Futile neighbor state loop prevention in high availability...

2011-01-11

2011-01-11

Mattis, Jason E (Department: 2461)

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

C370S238000, C370S242000

Reexamination Certificate

active

07869347

ABSTRACT:
A method for detecting and managing a futile neighbor state loop during link state routing is disclosed. The method can include reading a threshold parameter for link state routing, wherein the threshold parameter indicates a number of routing attempts, and performing link state routing to a node via a primary interface. The method can further include detecting a futile neighbor state loop during link state routing to the node via the primary interface by detecting a number of routing attempts that has reached the threshold parameter and detecting an available backup interface to the node. The method can further include suspending the primary interface to the node and switching routing to the backup interface.

REFERENCES:
patent: 5896496 (1999-04-01), Suzuki
patent: 2002/0054567 (2002-05-01), Fan

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