Troubleshooting SPF Calculation and Route Flapping

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This section explains the most common reasons behind route flapping in OSPF and SPF calculation. Whenever there is a change in topology, OSPF runs the SPF algorithm to compute the shortest path first tree again. Unstable links existing within the OSPF network could cause constant SPF calculation.

This section discusses the problem of SPF running constantly in the network for the following reasons:

  • Interface flap within the network

  • Neighbor flap within the network

  • Duplicate router ID

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Troubleshooting IP Routing Protocols
Troubleshooting IP Routing Protocols (CCIE Professional Development Series)
ISBN: 1587050196
EAN: 2147483647
Year: 2002
Pages: 260

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