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Performance and Fault Management by James M. Thompson, Kent J. Phelps, Robert L. Pavone, Christopher E. Elliott, Paul L. Della Maggiora

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Error/Fault Monitoring

Error and fault monitoring on any interface consist of monitoring the operational status and framing, signaling, or other errors that result in the loss of a frame. Each type of interface has its own unique errors. For example, Ethernet links have collisions. T1 links have bipolar violations. But all interfaces do share some basic fault data. The rest of this chapter is devoted to generic fault management of interfaces.

Link Status

The most basic fault management element of an interface is monitoring the link status. ifAdminStatus and ifOperStatus will show whether the interface is operational or not as far as the device is concerned. If ifAdminStatus is disabled, it is because the device administrator configured it that ...

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