From: Bob Sinclair (bsin@cox.net)
Date: Sun May 02 2004 - 17:36:41 GMT-3
Remember that when you issue the command "show ospf database" you see one
line per LSA. Each Router LSA may report multiple links. Try issuing the
command:
show ip ospf database router
This will give you a more comprehensive list of actual links in that area.
If you have a lot of links, try issuing the above with a "pipe include" on
the end, e.g.
sh ip ospf database router | include 1.1.1.0
Are you running multiple protocols? You could be seeing this LSA from
multiple ABRs if you are doing mutual redistribution at multiple points with
another protocol.
HTH,
Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net
----- Original Message -----
From: "CCIE 2004" <ccie2004@excite.com>
To: <ccielab@groupstudy.com>
Sent: Sunday, May 02, 2004 3:21 PM
Subject: BAD LSA in OSPF Database - How to determine originator
> Hi, I am trying to figure out if you have a Bad LSA being generated by
ABR's how do you find out who is the originator. I have looked around and am
going in circles because all I have are summary LSA's pointing to the other
ABRs. My thinking is that the LSA has to be originated somewhere. I have
checked all ABR's and do not find anything except Type 3 LSA's. This is
causing a subnet to be blackholed because the routers are seeing a /26
coming from somewhere. Can someone please lay out the steps to follow to
troubleshoot this. Thanks
>
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