Snmp Issue

Unanswered Question
Jul 14th, 2009


I am having some issue with my snmp configuration on 2960.

I have a third party NMS tool which provide me all the network information through SNMp.

But once my switch get reload i do not see the device up in my NMS tool .

I have to remove the SNMP configuration from the switch and put it back and it works.If the remove the device from the NMS tool and add it did not work.

I did debug on the switch when the switch come up my snmp is active .

Any idea why ?



Jul 9 17:59:33.992: SNMP: Packet received via UDP from x.x.x.x--NMS IP

.Jul 9 17:59:33.996: SNMP: Get request, reqid 13720652, errstat 0, erridx 0

lsystem.58.0 = NULL TYPE/VALUE


.Jul 9 17:59:34.004: SNMP: Response, reqid 13720652, errstat 0, erridx 0



.Jul 9 17:59:34.020: SNMP: Packet received via UDP from x.x.x.x

.Jul 9 17:59:34.020: SNMP: Packet sent via UDP to 172.25.xx.xx

.Jul 9 17:59:34.024: SNMP: Get request, reqid 13720654, errstat 0, erridx 0

ciscoMemoryPoolEntry.5.1 = NULL TYPE/VALUE

ciscoMemoryPoolEntry.5.1 = NULL TYPE/VALUE

ciscoMemoryPoolEntry.6.1 = NULL TYPE/VALUE

.Jul 9 17:59:34.040: SNMP: Response, reqid 13720654, errstat 0, erridx 0

ciscoMemoryPoolEntry.5.1 = NO_SUCH_OBJECT_EXCEPTION

ciscoMemoryPoolEntry.5.1 = NO_SUCH_OBJECT_EXCEPTION

ciscoMemoryPoolEntry.6.1 = NO_SUCH_OBJECT_EXCEPTION

TEST#sh snmp gr | b v3

groupname: snmpv3group security model:v3 auth

readview :<no readview specified> writeview: <no writeview specified>


row status: active

Configuration SNMP:

snmp-server user username test v3 auth md5 authpassword

snmp-server host xx.xx.xx.xx traps version 3 auth test

snmp-server group test v3 auth



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Rui Carlos Antunes Mon, 07/20/2009 - 04:32

It sounds like a bug, although of the 52 SNMP-related bugs, reported by the Bug Toolkit, none seems to apply to your case.

Try upgrading the switch to a more recent IOS version to see if the problem stops occurring.

vishwancc Tue, 07/21/2009 - 06:03

Hi Ran,

There is no change after the upgrade i have tried with many version.



Rui Carlos Antunes Thu, 08/20/2009 - 06:55

Is the SNMPv3 user password encrypted on the configuration? If so, there may be a bug when the router is not able, after the reload, to correctly read/decrypt the encrypted MD5 password. That may account for the SNMP to start work as soon as you reconfigure the SNMP password.

I don't recall if you can configure a clear-text SNMP password. If you can, then try configuring the password in clear-text.

You can also give it a shot with SNMPv2.

Good luck.


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