Re: Srr-queue bandwidth limit

Hello Jason, I hope this finds you doing well.

Jason, I did a quick lab test to practice this command and view the
results. Thanks for asking your question!

I had a wonderful lesson this week on Catalyst queuing by Narbik ... so i
was happy to see your question.

First, the answer is the port speed, and not the bandwidth command. If you
have questions, I would suggest reading the top of the srr queue section in
the 3560 guides. Some of the srr configs and parameters can get quite
confusing, but in order to find the answer you are looking for in this
thread, just read the theory section on srr. Also, the bandwidth limit
command section should help as it mentions the port.

Your question below can also easily be lab tested. You only need a client
and a switch; I used a router and a switch and then added another router in
order to generate more traffic via the ping command. Set the srr bandwidth
limit and see what affect it has on the traffic. While doing so, also set
the bandwidth command and see if the bandwidth command is factored in.
Quick and easy test!

The bandwidth command is not directly related to the actual port speed, and
can be set to whatever you want... it is for reference by other protocols
and functions.

A hint in case you wish to also test this - because I am only using ping in
my tests, I set the port speeds to be 10Mb on my switch. This helped me use
the bandwidth limit command and watched the rate go up or down based on my
settings.

Lastly, when watching the interface, keep in mind that this particular
command is for egress traffic. So, if you are pinging the switch from the
router, look for the output rate and not the input.

HTH,

Andrew Lissitz

.
.
On Fri, Apr 29, 2011 at 3:43 PM, Jason Lunde <willroute4food_at_gmail.com>wrote:

> If one has say an srr-queue bandwidth limit 20 on an interface, but also
> has
> the bandwidth command configured on the same interface; will the srr-queue
> bandwidth limit command use the physical port rate, or will it use what is
> referenced by the bandwidth command?
>
>
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-- 
Andrew Lee Lissitz
all.from.nj_at_gmail.com
Blogs and organic groups at http://www.ccie.net