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06-16-2015 03:22 PM
06-16-2015 03:22 PM
IMC server started sending out Interface Down traps for non-existent interfaces
The IMC server has started sending out traps for Interface Down for a range of non-existent interfaces, just increasing the index each time.
The server in IMC shows 24 interfaces, but the index is way past that. Getting 10-20 of these a day. Tried rebooting the server but no change. Wondering why this is happening all of a sudden, as its been a few weeks since last install/update. Any Ideas?
Name Link DOWN
Level Major
OID 1.3.6.1.6.3.1.1.5.2.0
Alarm at 2015-06-15 14:46:59
Alarm Source
hpimc.XXX.net(10.10.X.X) More Alarms...
Type Trap
Alarm Category Interface/Link Status Alarm
Recovery Status Unrecovered
Acknowledgement Status Unacknowledged
Description The interface 185 is DOWN.
Versions:
IMC PLAT 7.1 (E0303P10)
iMC NTA 7.1 (E0301P04)
iMC UAM 7.1 (E0302)
iMC WSM 7.1 (E0303P04)
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06-16-2015 05:55 PM
06-16-2015 05:55 PM
Re: IMC server started sending out Interface Down traps for non-existent interfaces
What's generating the traps? The underlying OS, or the IMC application?
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06-17-2015 10:54 AM
06-17-2015 10:54 AM
Re: IMC server started sending out Interface Down traps for non-existent interfaces
Good question -
source is host name, but the Windows SNMP service, while configured to be queried, was not set to send traps anywhere so that would mean the IMC application I'm thinking
Did not see anything in obvious windows events either.
Any other way to tell for sure?
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06-17-2015 01:08 PM
06-17-2015 01:08 PM
Re: IMC server started sending out Interface Down traps for non-existent interfaces
Something related to trap forwarding then?
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06-17-2015 01:59 PM - edited 06-17-2015 02:19 PM
06-17-2015 01:59 PM - edited 06-17-2015 02:19 PM
Re: IMC server started sending out Interface Down traps for non-existent interfaces
Don't think so as the IMC server itself is the destination for traps from other devices. At least not intentionally forwarded traps onward.
I restarted the SNMP agent for the windows OS that imc is running on. That generated a trap for cold start (or agent restart) with the source being the IMC server. OID 1.3.6.1.6.3.1.1.5.0.0
I added public to the traps tab of the SNMP service with the IP of the IMC server (on that same server). Now I get "Device receives an SNMP message with an erroneous community string" error
Same source - the IMC server - OID 1.3.6.1.6.3.1.1.5.4.0
I used the mib management option to query the snmp agent on the IMC server
1.3.6.1.6.3.1.1.5.4 Description: A linkUp trap signifies that the SNMP entity, acting in an agent role, has detected that the ifOperStatus object for one of its communication links left the down state and transitioned into some other state (but not into the notPresent state). This other state is indicated by the included value of ifOperStatus.
Not the same description as IMC is reporting. Sorry, not much of an expert on snmp....
But the Interface down errors MAY be gone - will need to watch for a while. In the meantime removed the public trap config from above so will see if no longer reporting erroneous string.
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06-17-2015 03:55 PM
06-17-2015 03:55 PM
Re: IMC server started sending out Interface Down traps for non-existent interfaces
OK - no issue any longer. To review:
Alarms for non-existent interfaces on the IMC server started 6/4 and continued until today.
Today -
Set public trap destination to IMC server in SNMP service - was blank - restart service
New Alarm for "Device receives an SNMP message with an erroneous community string" every 17 minutes
Clear public trap destination to IMC server in SNMP service and restart service
Both Alarms gone -
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06-19-2015 08:41 AM
06-19-2015 08:41 AM
Re: IMC server started sending out Interface Down traps for non-existent interfaces
Weird. At least it's behaving now.
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06-19-2015 11:33 AM
06-19-2015 11:33 AM
Re: IMC server started sending out Interface Down traps for non-existent interfaces
It's really weird - and still not totally behaving. I have not been able to get a repeatable pattern, so I held off adding more to the thread. Reboots, service restarts, nothing has proven to have repeatable cause/relief
Interface down alarms came back, so I poked at it again. Still not fixed. The SNMP settings in IMC match the WIndows service security tab, and test OK in the configure SNMP settings on the device page. All my widnows servers have the same settings for r/w security. But they are not sending traps. Only on the IMC server.
W/o the sending traps, was getting "Device receives an SNMP message with an erroneous community string" alarm
For sending traps, using the same settings as the switches, but you can't set the destination in IMC - gives an error, even if set in the Windows snmp service
I have another server just started sending the same erronous alarm as this discussion has progressed.
Starting to wonder about the imc state in general - my database auto backup stopped working 3 days ago. Also my routing switch, has several times changed from device role routers to virtual. Some data related issue?
All my modules except UAM are latest. UAM still does not authenticate computer properly despite claim to have fixed this.
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06-19-2015 07:38 PM
06-19-2015 07:38 PM
Re: IMC server started sending out Interface Down traps for non-existent interfaces
@NeilR wrote:
For sending traps, using the same settings as the switches, but you can't set the destination in IMC - gives an error, even if set in the Windows snmp service
Setting the trap destination from IMC only works for systems that allow SNMP read/write, and where IMC has the right adapters. It won't work for Windows servers.
Seems like something a bit weird is going on with that system. Hard to say for sure what's happening tho
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06-22-2015 10:18 AM
06-22-2015 10:18 AM
Re: IMC server started sending out Interface Down traps for non-existent interfaces
figured that was the case.
Tried it on a netapp server, which I had previously set trap destination. It now fails.
Defintely starting to wonder if there is some DB or data corruption going on. Its been a few weeks now since I upgraded to E0303P10 but odd things have been building. Unless some issue related to running UAM back at E302. But can't go forward on that until they fix PEAP computer auth, now rumored to be in UAM 303P14. Go back to last main version?
Not sure how to address possible DB issues. Do a restore? don't really want to rebuild from scratch.