Invention Grant
- Patent Title: Performing non-revertive failover with network devices
- Patent Title (中): 使用网络设备执行非恢复故障切换
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Application No.: US12788115Application Date: 2010-05-26
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Publication No.: US07940646B1Publication Date: 2011-05-10
- Inventor: Rahul Aggarwal , Nischal Sheth
- Applicant: Rahul Aggarwal , Nischal Sheth
- Applicant Address: US CA Sunnyvale
- Assignee: Juniper Netwoks, Inc.
- Current Assignee: Juniper Netwoks, Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Shumaker & Sieffert, P.A.
- Main IPC: G01R31/08
- IPC: G01R31/08

Abstract:
Techniques are described for performing non-revertive failover with network devices. A network device comprising 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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