High response times, but low utilization and low CPU

[gary.storr]

i have a 2901 running C2900-UNI​VERSALK9-M​), Version 15.1(4)M1 which is showing some odd behaviour on the WAN link. When there is traffic on the WAN Link the responce times are normal ( 2ms - 8ms) but when there is no traffic (evenings/weekends) the response times jump up to between 100ms - 400ms.

The router works fine and there are no obvious symptons showing to the end users. This behaviour stopped for a few days after a reboot but then started again.

Is there anything i can run on the router to see what might be causing this? or has anyone come accross this before.

Thanks you anyhelp

[mahmoodmkl]

HI

Can you check the memory and processor utilization during the time of the issue and check which process is using the max.

Thanks

[gary.storr]

Below is the memory and CPU utilization while the responce times were between 100 and 200ms and the utilization on the circuit was 0.3%. The response times to the A End of the circuit is static at around 2ms -3ms as expected.

xxxxxx#sho processes memory

Processor Pool Total:  320488576 Used:   46632680 Free:  273855896

      I/O Pool Total:   41943040 Used:   19017520 Free:   22925520

PID TTY  Allocated      Freed    Holding    Getbufs    Retbufs Process

   0   0  182889668  119260576   60102516        672     343570 *Init*

   0   0      12328    1300612      12328          0          0 *Sched*

   0   0   81072000   79620192     762600         46         46 *Dead*

   0   0          0          0     394868          0          0 *MallocLite*

   1   0   41441212   36205248    5507448          0          0 Chunk Manager

   2   0        240        240       4232          0          0 Load Meter

   3   0      21016        712      46112          0          0 LICENSE AGENT

   4   0      65588          0      90820          0          0 EDDRI_MAIN

   5   0          0          0       7232          0          0 RO Notify Timers

   6   0       3340        240      10332          0          0 Check heaps

   7   0   10795176   13207480     127028         49          0 Pool Manager

   8   0          0          0       7232          0          0 DiscardQ Backgro

   9   0        240        240       7232          0          0 Timers

  10   0          0          0       4232          0          0 WATCH_AFS

  11   0          0          0       7232          0          0 License Client N

  12   0          0          0       7232          0          0 Image License br

  13   0 2391728888 2391730096       7264          0          0 Licensing Auto U

  14   0        240        240       7232          0          0 Environmental mo

  15   0          0          0       7232          0          0 IPC Event Notifi

xxxxxx#sho processes cpu

CPU utilization for five seconds: 5%/4%; one minute: 2%; five minutes: 1%

[bank.vtb.account]

where is the WAN link connected? to provider?

[gary.storr]

The WAN link connects to a 6524 within our own MPLS network.

[Jeff Van Houten]

Have you checked for errors on the interface?
Sent from Cisco Technical Support iPad App

[gary.storr]

There are no errors on either end of the WAN interface.