cisco 881 router - Memory Utilization Maxed Out

Hi All,
I have an issue with a cisco 881 router, the memory utilization maxes out about every 24 hours,  and the router requires a reset.
This started happening after a new VOIP phone system was installed.
Once the memory maxes out the VPN connection drops, unable to telnet, and router has to be restarted.
I have managed to get onto the router just before it locks up. (Screen shots attached),
If anyone has any guidance I would be greatly appreciated. ( or is this just a case of memory needs to be upgraded in the router? )

Thank You

Cisco, 881, Router, memory utilization
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Post a show version and show stacks. This is not a normal case and there is a high likelihood that a newer IOS version already solves your problems. If that's not available opening a TAC case would be the next option.
stephenHenderson123Author Commented:
Thank You results of sh ver, show stacks below
this was when mem usage was up to about 40% another 6 or so hrs and it would be nearly maxed out.

SH Ver
Cisco IOS Software, C880 Software (C880DATA-UNIVERSALK9-M), Version 15.0(1)M4, RELEASE SOFTWARE (fc1)
Technical Support:
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Fri 29-Oct-10 00:02 by prod_rel_team

ROM: System Bootstrap, Version 12.4(22r)YB5, RELEASE SOFTWARE (fc1)

NewYorkRouter uptime is 19 hours, 40 minutes
System returned to ROM by power-on
System restarted at 08:09:41 BST Thu Mar 29 2012
System image file is "flash:c880data-universalk9-mz.150-1.M4.bin"
Last reload type: Normal Reload

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Cisco 881 (MPC8300) processor (revision 1.0) with 236544K/25600K bytes of memory.
Processor board ID FCZ1510C0GA

5 FastEthernet interfaces
1 Virtual Private Network (VPN) Module
256K bytes of non-volatile configuration memory.
125440K bytes of ATA CompactFlash (Read/Write)

License Info:

License UDI:

Device#   PID                   SN
*0        CISCO881-K9           **********

License Information for 'c880-data'
    License Level: advsecurity   Type: Permanent
    Next reboot license Level: advsecurity

Configuration register is 0x2102

SH Stacks
Minimum process stacks:
 Free/Size   Name
 8504/9000   EEM ED RF
11032/12000  MRIB IPv4 Init Process
 5532/6000   Inspect Init Msg
 5528/6000   SPAN Subsystem
 2884/12000  Init
58888/60000  EEM Auto Registration Proc
 5196/6000   DIB error message
 5536/6000   SASL MAIN
 2496/3000   Rom Random Update Process
 5480/6000   URPF stats
 8232/12000  Exec

Interrupt level stacks:
Level    Called Unused/Size  Name
  1           0   9000/9000  i2c console redirect host Interrupt
  4    41566759   5236/9000  Host/PCI Bridge Interrupt
  5    76592513   8824/9000  PQII PRO Timer
  6         644   8908/9000  16552 Con/Aux Interrupt

Interrupt level stacks:
Level    Called Unused/Size  Name
  7    19164518   8884/9000  M8300_TIMER_INTERRUPT
Stupid question to ask for show stacks, since you had to power the router. It does not help finding out the reason of the crash.

There are some bugs related to memory issues in 15.0(1) versions. It might be useful to upgrade to 15.0(1)M8 or even 15.1(4)M4 to see if the error reoccurs. Before opening a case Cisco TAC asks you generally to upgrade to the latest release and that's what you'd be doing with the releases above.

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stephenHenderson123Author Commented:
Cheers, I will upgrade the IOS, in the morning before the users come on-line.
will let you know how I get on
Thank You
Hope it helps. Good luck!
New IOS will help!
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