Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Cisco 2800 Series Routers crash with "%SYS-2-MALLOCFAIL: Memory fragmentation No Alternate pool" errors

Core issue

Cisco bug ID CSCsb60583 documents this issue.

When you run a Cisco 2800 Series Router at high CPU utilization, the I/O memory begins to decrease until all memory is exhausted. At this point, the router begins to report Pool Manager tracebacks.

This symptom is observed on a Cisco 2811 or Cisco 2821 that uses the onboard VPN crypto engine. The symptom is prominently observed when crypto is configured over serial interfaces.


In order to resolve this issue, upgrade to Cisco IOS Software Release 12.4.10.

In order to download the image, visit the IOS Upgarde Planner.

Version history
Revision #:
1 of 1
Last update:
‎06-22-2009 05:37 PM
Updated by:
Labels (1)