Re: [nv-l] Cisco 3750's stackwised
2006-02-22 17:54:06
Its a software loopback thats up all the time. Right now its polling every minute so it doesn't seem to be cisco issue. Ran a continues ping to the ip from a different box and it still droped the loopback down on the netview box. This problem is weird and I'm baffled.
Can snmpwalk the device just fine with the provided community string also.
Thanks all for any suggestions
Any other ideas?
On 2/23/06, James Shanks <jshanks AT us.ibm DOT com> wrote:
Are you certain that this is not a Cisco issue? You said that when you do the demandpoll, the loopback shows as down, but
comes back up after a ping. So it's entirely possible from what you've described that Cisco is dropping the loopback interface after some period of inactivity, isn't it? Or did I miss something in your description?
If they are dropping the loopback after some period of time, then no amount of tinkering with netmon is going to change that fact, unless, of course, you poll so frequently that they don't get a chance to drop it.
James Shanks Level 3 Support for Tivoli NetView for UNIX and Windows Tivoli Software / IBM Software Group
Brett <bgillmore@gmail. com> To
Sent by: nv-l AT lists.us.ibm DOT com owner-nv-l@lists. cc
us.ibm.com Subject Re: [nv-l] Cisco 3750's stackwised 02/21/2006 08:44 PM
Please respond to nv-l AT lists.us DOT ibm .com
Thanks for that. Just checked the Community strings and names and those
appear ok. Even tried changing the community string and still got the same problem. Any other ideas?
On 2/22/06, Evans, Bill <Bill.Evans AT hq.doe DOT gov> wrote:
I had a similar situation which resulted from case problems among the various configurations including xnmsnmpconf and the hostname resolution. Somewhere after I added the node the case of the name changed in the /etc/hosts file and messed things up nicely. A0346K2
versus A0346k2 type of thing.
With the help of some very tolerent support folks and a lot of tracing and debugging we eliminated everything else. It all came down to a bad community string resolution because of the names in different mixtures
of case. Check it out.
Bill Evans
-----Original Message----- From: owner-nv-l AT lists.us.ibm DOT com [mailto:owner-nv-l AT lists.us.ibm DOT com
] On Behalf Of Brett Sent: Tuesday, February 21, 2006 5:47 PM To: nv-l AT lists.us.ibm DOT com Subject: [nv-l] Cisco 3750's stackwised
Greetings all,
Just wondering of anyone else has had this issue. We have two set's of
3750's stackwised. Each set is configure with two switches setup with the same loopback ip addr on each pair. Heres the issue:
We can snmp poll the device just fine, ping the loopback ok and the interface goes green. However whenever netmon polls the device it drops
the loopback down when its not. From here you can demand poll the switch and it shows the loopback down, but you can ping it back up, then do another demand poll and it reports the interface as being up and looking
ok. It will show green until netmon does the normal timed poll then drops it backdown again.
Anyone have any clues how to get this fixed or things I can try???
Sorry would call support but have to get the support contract reinstated
but that will take a few weeks to sort out within the company.
thanks all
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