Performing non-revertive failover with network devices

Details Performing non-revertive failover with network devices Performing non-revertive failover with network devices

2007-01-09

2010-06-15

Pham, Chi H (Department: 2471)

Multiplex communications

Data flow congestion prevention or control

C370S237000

Reexamination Certificate

active

07738367

ABSTRACT:
Techniques are described for performing non-revertive failover with network devices. A network device including a control unit and interface cards receives routing information protocol (RIP) updates each having a metric value. The control unit signals bidirectional forwarding detection (BFD) sessions based on the metric values of each of the RIP updates with, for example, a media gateway. The control unit also selectively installs a RIP route based on the metric values. The media gateway monitors the BFD sessions, and upon failure of an active BFD session, indicates the network device to perform non-revertive failover by sending a revised plurality of RIP updates. The network device performs non-revertive failover according to the revised plurality of RIP updates. Because of the flexibility of BFD, the network device need not revert back to a previous RIP route, therefore curtailing excessive failover.

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