Invention Application
- Patent Title: OSPF backup interface
- Patent Title (中): OSPF备份接口
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Application No.: US09739902Application Date: 2000-12-20
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Publication No.: US20020078232A1Publication Date: 2002-06-20
- Inventor: Valerie A. Simpson , Dwight D. Jamieson , Nevein T. Sultan
- Applicant: Nortel Networks Limited
- Applicant Address: null
- Assignee: Nortel Networks Limited
- Current Assignee: Nortel Networks Limited
- Current Assignee Address: null
- Main IPC: G06F015/173
- IPC: G06F015/173

Abstract:
A method and apparatus provides protection against resource failures in Open Shortest Path First (OSPF) networks, without increasing the complexity of the network topology and/or management. An internal router (IR) automatically maintains a back-up link in a dormant state until a network failure affecting communications with a primary adjacent area border router (ABR) is detected. Upon detection of the network failure, the IR activates the back-up link in order to enable traffic flow to an alternate adjacent ABR, which by-passes the network failure. Upon recovery of communications with the primary adjacent ABR, the IR automatically deactivates the back-up link and resumes traffic flow through the primary adjacent ABR. As a result, traffic is forwarded into the back-up link only when communications with the primary adjacent ABR has failed, thereby maintaining simplicity in the network topology, and minimizing network management and administration requirements.
Public/Granted literature
- US07234001B2 Dormant backup link for OSPF network protection Public/Granted day:2007-06-19
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