SNMP packet are droping, unable to monitor cisco 1801

raza555 · ‎03-13-2015

Hi,

I have Cisco1801/K9 routers and we can monitor it only via PING, as when we monitor it via the SNMP it works for 30-45 minutes and then drop happens. From my management PC, I randomly get don’t fragment” message with both success and failure.

I initially thought that it’s a MTU issues, so from my mgmt. PC I run command “Ping 10.10.10.1 –f –l 1398” and found that ‘df’ message do not appear on MTU size 1398, so I have configured the router crypto vpn interface with IP MTU 1394, but still snmp packets are dropping.”

As this router is establishing site-to-site vpn, so I have configured it with “'crypto ipsec df-bit clear'” but again snmp packet drop.

I don’t know what else I do as I cannot monitor it via SNMP, only can monitor it via PING.

Any help is appreciated.

Thanks

Reza Sharifi · ‎03-13-2015

Hi,

Try opening a ticket with the company you purchased the management software from and go from there.It could also be a bug in the IOS, but I would start with management software.

HTH

raza555 · ‎03-16-2015

Hi,

I don't think that management software have any issues as its managing thousands of devices and this device they can only be managed via pings but when they manage it via SNMP, it works for 30-45 minutes then SNMP drop happens. When they wireshark the traffic don’t fragment” message is displayed with both success and failure.

IOS version of the devices is 'c180x-advipservicesk9-mz.150-1.M7.bin'

Router#show snmp
Chassis: Serial_Number
6147356 SNMP packets input
    0 Bad SNMP version errors
    1 Unknown community name
    0 Illegal operation for community name supplied
    0 Encoding errors
    6380983 Number of requested variables
    0 Number of altered variables
    5955527 Get-request PDUs
    188780 Get-next PDUs
    0 Set-request PDUs
    0 Input queue packet drops (Maximum queue size 1000)
6150741 SNMP packets output
    0 Too big errors (Maximum packet size 1500)
    0 No such name errors
    0 Bad values errors
    0 General errors
    6147355 Response PDUs
    3386 Trap PDUs
SNMP Dispatcher:
   queue 0/75 (current/max), 0 dropped
SNMP Engine:
   queue 0/1000 (current/max), 0 dropped

SNMP logging: enabled
Logging to 10.0.102.1.162, 0/10, 3370 sent, 16 dropped.
Router#

Any advise will be much appreciated