Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

OSPF routing question

Does anybody know why after I issued the command to use OSPF protocol for routing, I can see a number of routes (using "show ip routes"). But 5-10mins later when I issue the "show ip route" command again. I don't see any routes anymore?

  • Other Network Infrastructure Subjects

Re: OSPF routing question

Waht does your config look like and and are there any other routers in your OSPF domain ?

New Member

Re: OSPF routing question

Hi, thanks for replying.

Yes there are. Its a WAN link (leased line). I can see my other routers at first, but just as I mentioned earlier after a few minutes later, it's gone. Really weird to me.


Re: OSPF routing question

could be mismatched timers on the two routers. But I'm not sure if ospf will even build an adjaceny if the timers dont match. Try 'sho ip ospf int' on both routers and compare the hello, dead and wait timers.

New Member

Re: OSPF routing question

Log in to the 2 routers either side of the wan link

term mon

debug ip routing

See if there are any tell tale clues when the routes flap again. If not the problem is probably not related to your WAN link.

If the OSPF timers were wrong you wouldn't get an adjacency at all.

This widget could not be displayed.