[c-nsp] Card Throughput - 6148A-GE-TX

[Matt Buford]

On Fri, Jan 29, 2010 at 11:01 AM, Paul Stewart <paul at paulstewart.org> wrote:

> We are aware of what the entire card is capable of (2 Gb/s), but is there
> any way to see how much is being utilized from within IOS itself?  We can
> start counting up all the ports but is there an easier way? ;)
>
> Relating to this, is the card limited to 2Gb/s total or 1Gb/s per  half?
>  We
> have a situation with a couple of these cards where they are pushing the
> potential limits and we want to make sure..
>

Each range of 8 ports (1-8, 9-16, 17-24, 25-32, 33-40, 41-48) has an ASIC.
 Each ASIC can do a max of 1 Gb in each direction.  If all ports on a group
of 8 were to upload and download, their combined throughput would be 1 Gb
upload and 1 Gb download.  If all ports on the card were to upload and
download at the same time, the combined throughput would be 6 Gb upload and
6 Gb download (1 Gb per group with 6 groups).

For details, including counters for dropped packets due to this issue:

http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00801751d7.shtml#ASIC