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.
Claims19
A method, comprising:
- configuring a session registrant database to have one or more virtual standby states, a virtual standby state corresponding to one of one or more first routers configured to have an active state;
- receiving, by the session registrant database, information from the one or more first routers;
- determining that a first router of one of the one or more first routers has failed;
- setting a virtual standby state corresponding to the failed first router to a virtual active state;
- configuring a second router of one or more second routers to have a standby state associated with the set virtual active state;
- transferring the information received from the failed first router to the second router;
- and
- configuring the second router to have an active state.
An apparatus, comprising:
- a memory operable to store information from one or more first routers configured to have an active state;
- and
- logic embodied in one or more tangible media for execution and when executed operable to:
- configure the session registrant database to have one or more virtual standby states, a virtual standby state corresponding to one of the one or more first routers configured to have an active state;
- determine that a first router of the one or more first routers has failed;
- set a virtual standby state corresponding to the failed first router to a virtual active state;
- configure a second router of one or more second routers to have a standby state associated with the set virtual active state;
- transfer the information received from the failed first router to the second router;
- and
- configure the second router to have an active state.
An apparatus, comprising:
- means for storing session information;
- means for configuring a session registrant database to have one or more virtual standby states, a virtual standby state corresponding to one of one or more first routers configured to have an active state;
- means for receiving, by the session registrant database, session information from the one or more first routers;
- and
- means for determining that a first router of the one or more first routers has failed;
- means for setting a virtual standby state corresponding to the failed first router to a virtual active state;
- means for configuring a second router of one or more second routers to have a standby state associated with the set virtual active state;
- means for transferring the session information received from the failed first router to the second router;
- and
- means for configuring the second router to have an active state.
Dependencies are inferred from the claim text.