[c-nsp] Transfer speed issues on 3560G

[Jon Lewis]

On Thu, 24 Jun 2010, Brandon Ewing wrote:

> This is a strange issue that I have noticed on a 3560G that we have
> deployed.  We have two servers, on different ports, controlled by different
> ASICs.  Each port negotiates a 1000mb/s link, but I cannot get more than
> 11MB/s (88mb/s) of traffic between the two ports.  I conducted the following
> tests:
>
> Transferring a 1GB file from one server to the other, written to /dev/null
> Single transfer averaged 11.2MB/s

What are you using to do the transfers?
What are the srr-queue bandwidth settings for the ports involved?
Are you doing anything special with CoS or DSCP?

The 3560 has some silly default behavior for shaping/sharing of bandwidth 
between the 4 queues per port.

----------------------------------------------------------------------
  Jon Lewis                   |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
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