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New Member

3750 I/O memory high

Hi,

I have a 3750 switch which reports 70% of I/O memory usage. Can you please help out in finding a document about the normal I/O memory values for the switches?

with thanks

sathappan

  • LAN Switching and Routing
6 REPLIES

Re: 3750 I/O memory high

Hi,

Can you post show mem output and find your busiest interface on this switch and do a show int. See if any buffer drops are happening.

Regards

Ganesh.H

New Member

Re: 3750 I/O memory high

Hi,

Please find below the show memory output. the show interface output is attached.

------------------ show memory statistics ------------------


                Head    Total(b)     Used(b)     Free(b)   Lowest(b)  Largest(b)
Processor    2F6A984    72177276    33126772    39050504    37326880    36384268
      I/O    7400000    12574720     8699904     3874816     3779860     3824352
Driver te    1C00000     1048576          44     1048532     1048532     1048532

Re: 3750 I/O memory high

Hi Sathappan,

As per the output following observation can be taken into account

Processor memory utilization is 45.8964%.
Processor memory or main memory stores the running configuration and routing tables. The Cisco IOS software executes from main memory.The amount of processor memory required by the router is affected by the Cisco
IOS version used, the size of the network and by the access list configurations.
Ensure that an optimal IOS version has been chosen.

And few interfaces are having inpurt error also and can you also paste show process memory and show version output also.

Regards

Ganesh.H

New Member

Re: 3750 I/O memory high

Hi Ganesh,

Thanks for your efforts and time. I also got the same output from Output Interpreter.  But what I am looking for is the normal values for the I/O memory utilization.

If you could give me some links, it would be helpful

with thanks

sathappan

Re: 3750 I/O memory high

I cannot get the exact normal value for I/O memory process but check out the below link hope this helps

http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_tech_note09186a00800a6f3a.shtml#inprocessormemory

Regards

Ganesh.H

New Member

Re: 3750 I/O memory high

Thanks for your time.

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