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Cisco Bug: CSCsy87498 - Missing routes with iSPF and transit-area

Last Modified

Feb 15, 2018

Products (1)

  • Cisco IOS

Known Affected Releases

12.2(33)SXH 12.2SR

Description (partial)

Symptom:

Missing routes in the routing table.
Missing paths in the router border table, which is visible using show command
    show ip ospf border


Conditions:

Router may stay without external and inter area routes under
these very specific conditions
 - router is configured with command ispf
 - router has connectivity to area 0 via virtual-link
 - non-zero area provides better path to same of the ABRs in area 0,
   therefore we can see in 'show ip ospf border' paths with flag transit
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  • Status
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