Method and apparatus for providing network redundancy
AssigneeCisco Technology, Inc.
InventorsBhaskar Bhupalam, Michael Shannon, Anand Oswal
Life of this patent
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Abstract
According to one embodiment, providing network redundancy includes configuring a session registrant database to have one or more virtual standby states. Each virtual standby state corresponds to an active router. The session registrant database receives session information from the active router(s) and determines that an active router has failed. A virtual standby state corresponding to the failed router is set to a virtual active state. A second router is configured to have a standby state associated with the set virtual active state. The session information received from the failed router is transferred to the second router, and the second router is configured to have an active state.
Claims18
A method, comprising:
- configuring a session registrant database to have a plurality of virtual standby states, each virtual standby state corresponding to a respective one of a plurality of first physical router devices, each first physical router device configured to have an active state;
- receiving, by the session registrant database, information from each of the plurality of first physical router devices;
- determining that a first physical router device of the plurality of first physical router devices has failed;
- setting the virtual standby state corresponding to the failed first physical router device to a virtual active state;
- configuring a second physical router device of one or more second physical router devices to have a standby state associated with the set virtual active state;
- transferring the information received from the failed first physical router device to the second physical router device;
- and
- configuring the second physical router device to have an active state.
An apparatus, comprising:
- a memory operable to store information from each of a plurality of first physical router devices, each first physical router device configured to have an active state;
- and
- logic instructions embodied in one or more non-transitory computer-readable media, the logic instructions when executed operable to:
- configure a session registrant database to have a plurality of virtual standby states, each virtual standby state corresponding to a respective one of the plurality of first physical router devices;
- determine that a first physical router device of the plurality of first physical router devices has failed;
- set the virtual standby state corresponding to the failed first physical router device to a virtual active state;
- configure a second physical router device of one or more second physical router devices to have a standby state associated with the set virtual active state;
- transfer information received from the failed first physical router device to the second physical router device;
- and
- configure the second physical router device to have an active state.
Dependencies are inferred from the claim text.