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Cisco Bug: CSCvu00553 - With Route summarisation OSPF Sets FA on the route Type-5 LSA

Last Modified

Jul 30, 2020

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases

7.3(5)N1(1)

Description (partial)

Symptom:
With discard-route external (default) 
After configuring a summary address and redistribute the direct routes to OSPF.
The device generates a Type-5 LSA for the summary route and sets the forwarding address instead of 0.0.0.0.
Setting the forwarding address  does not cause an impact because off the route to Null 0 that was already created automatically with the summarisation.

Conditions:
1)use of summary address
2)redistribute direct routes into OSPF 
3)reload the device
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