3845 memory utilization increases

[Shaikh Aman Uddin]

Hi,

Cisco 3845 router (256RAM / 64Flash), increases the cpu utilization upto 70~80 percent, during the time of high utilization, I am unable to run show command on router.

The configuration is simple, this is connected with two internet links (24Mbps and 8Mbps) and its about 600~700 users are using internet.

show version, show memory and show process cpu outputs are attached here.

Kindly advise.

[Shaikh Aman Uddin]

Router is getting errors on console:

%% Low on memory; try again later

%% Low on memory; try again later

%% Low on memory; try again later

%% Low on memory; try again later

%% Low on memory; try again later

*Jun  1 08:25:02.871: %SYS-2-MALLOCFAIL: Memory allocation of 2000 bytes failed from 0x6018AFA0, alignment 8
Pool: Processor  Free: 101600  Cause: Memory fragmentation Alternate Pool: None  Free: 0  Cause: No Alternate pool
 -Process= "Chunk Manager", ipl= 3, pid= 1,  -Traceback= 0x618EF478 0x60165194 0x6016A868 0x6018AFA8 0x6018A000 0x60189DE4
*Jun  1 08:25:02.871: %SYS-2-CHUNKEXPANDFAIL: Could not expand chunk pool for NAT Fragment0 . No memory available -Process= "Chunk Manager", 
ipl= 3, pid= 1,-Traceback= 0x618EF478 0x60189E28
*Jun  1 08:25:04.107: %IP_VFR-4-FRAG_TABLE_OVERFLOW: GigabitEthernet0/0: the fragment table has reached its maximum threshold 16
%% Low on memory; try again later

[Leo Laohoo · Accepted solution]

%% Low on memory; try again later

This is very typical of a memory leak bug.  You will need to upgrade the IOS or reboot your appliance if you are unwilling to do so.

[Shaikh Aman Uddin]

Thank you for reply,

Can you recommend any updated IOS which will not show such error again.

Thanks

[Leo Laohoo · Accepted solution]

Can you recommend any updated IOS which will not show such error again.

Before you download the IOS of your choice, read the Release Notes.

[Shaikh Aman Uddin]

thanks a lot dear friend !!!

[Leo Laohoo]

Thanks for the ratings.

[Shaikh Aman Uddin]

HI,

I hv a question, can we limit NAT connection per user basis on IOS router?

Aman