07-29-2007 02:17 AM - edited 03-05-2019 05:33 PM
Is it normal for the OSPF routes to be updated in the routing table every 20 sec.,
O 10.11.254.80/28 [110/14] via 10.1.131.131, 00:00:09, FastEthernet5/0/0
As you can see from the partial ?show IP route?, the route was updated 9 sec ago, it keeps updated every 19 sec. Is that normal?
07-29-2007 07:31 AM
The route could be flapping, and there are many reason it could do so;
- Link up and down
- Duplicate Router ID
- DDR
- Configuration problem (i.e. redistribution ?)
You have to find out where that route comes from to narrow down your next step.
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800949f7.shtml
07-30-2007 05:58 AM
You can use the "show ip ospf statistics" and "show ip ospf statistics detail" to find what causes the route to be reinstalled in the RIB.
Hope this helps,
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