[c-nsp] 3750 CPU Usage; TCAM Exhaustion?

[Carl Jones]

On Wed, Aug 5, 2009 at 8:24 PM, Michael Schedrin<mschedrin at gmail.com> wrote:
>> core-dal#sh platform tcam utilization
>>
>> CAM Utilization for ASIC# 0                      Max            Used
>>                                             Masks/Values    Masks/values
>>
>>  Unicast mac addresses:                        400/3200        373/2911
>
> Look at "sh mac address-table count" Check "Total Mac Address Space
> Available:"
> 3750 hat a table for 6000 mac adresses. If you stack 3*3750, this bundle
> will also have table of 6000.

Yep, that seems to be it:

core-dal#sh mac address-table count | in Space
Total Mac Address Space Available: 0

>> I suspect I may be seeing TCAM exhaustion. Any suggestions on how I
>> can confirm or avoid that?
>
> You have two ways to avoid the problem. First - change sdm to "vlan". Second
> - disassemble stack and make every switch use it's own mac-address-table and
> tcam. You will summary have 6000*3 mac addresses table.

Thanks for your suggestions Michael. Makes sense.

Regards,
Carl