[c-nsp] "show platform hardware capacity" shows sup720-3b FIB tableat 98%

Yuri Lukin lists at swaggi.com
Thu Oct 19 10:00:43 EDT 2006


Tim Stevenson wrote..
>This is correct - it has to do with a limitation of the specific TCAM 
>memory used in PFC3B/BXL which requires that the entries used for 144 
>bit routes (v6 & multicast) be allocated in blocks of 16K 72-bit 
>entries (=8K 144 bit entries).
>
>I would think 239K is adequate for the forseeable future for IPv4 
>routes, but would like to be enlightened if that's not the case 
>(flame-proof suit donned).
>
>Not sure if it was mentioned elsewhere in this thread, but be aware 
>that changing the max-routes config does require a system reboot...
>
>Tim

I don't mean to beat a dead horse by bringing up an old subject, but 
I'm hoping someone can clarify this for me. According to what Tim and many
others have said, the realistic route limit is 239k. However, according
to the following Sup720 data sheet, it says that the 3BXL supports
up to 1,000,000 IPv4 routes:

http://www.cisco.com/en/US/products/hw/switches/ps708/products_data_
sheet09186a0080159856.html

Is this something that's changed in the last 3 months?

Regards,
Yuri


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