From: Nawaz, Ajaz (Ajaz.Nawaz@bskyb.com)
Date: Tue Jul 08 2003 - 14:59:36 GMT-3
debug ip ospf adj and output from show log may help.
does the adj break due to interface flap or another reason ?
have you investigated the possibility that you are hitting a bug ?
ajaz
-----Original Message-----
From: Kelly Cobean [mailto:kcobean@earthlink.net]
Sent: 08 July 2003 18:45
To: ccielab@groupstudy.com
Subject: OSPF Random adjacency failures
Hey all,
I've got a problem on a production system that I just can't seem to
pinpoint an answer for. I've got a pair of 6500 switches with 48 port
ethernet blades and Sup1A-2GE/MSFC2's in them. The gig ports on the
supervisors are channeled and trunking. Port 1 of each ethernet blade
is in VLAN 2 and goes to a Cat2924XL, which also connects a pair of
3640's. The MSFC's are both configured with a VLAN1 and VLAN2
interface. The problem I am having is that the adjacency between one of
the MSFC's and one of the 3640's (which is the DR for the segment)
randomly drops, then comes right back up. I can watch the output of
'show ip ospf neighbor' on the DR, and when this occurs, I can see the
dead timer counter go to 0, then as soon as the adjacency drops, it
comes right back up. At first I thought it might have been a problem
with the fact that VLAN2 was permitted across the trunk between the two
cat's so I cleared the vlan from the trunk, but to no avail. I've run
all the typical debug commands, but I don't see anything indicative of
the problem. Traffic levels are normal, and there are no access-lists
in the path. Anyone have any ideas?
Thanks.
-- Kelly Cobean <kcobean@earthlink.net>
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