[c-nsp] 3560 QoS/shaping

[Brad Henshaw]

Jon Lewis wrote: 

> I'm configuring my first 3560s...
> you can't police the output of a port
> you can't even define an output service-policy for a port.

This is correct as far as I'm aware.

> It appears the 3560-way to do this is to use srr-queue bandwidth
> shape on the interface, but the syntax for this command isn't
> nearly as flexible...
> Is this possible on the 3560?

You can try the 'srr-queue bandwidth limit' to rate-limit traffic on
egress but this is only done at the port level for ALL traffic and has
its own limitations as it's percentage-based. The only option other than
what you've suggested and the srr-queue bandwidth limit is to apply
ingress policers on all of the relevant ports. You /might/ be able to
get away with using an aggregate policer in this situation but I have no
idea whether this would be supported at ingress on the 3560.

You'd need a 3750ME for anything much more advanced -- and even then,
this functionality is limited to two of the gig ports. I think the
3400ME's support egress policies but they have their own limits and
retardations in this respect.

Regards,
Brad