[c-nsp] 3560 QoS/shaping

[Jon Lewis]

I'm configuring my first 3560s, and am a little shocked to see that 
per-port output policing (via service-policy output <policyname>) as we've 
done for years on 3550s isn't permitted on the 3560.

Trying it results in
  police command is not supported for this interface
  Configuration failed!
  Warning: Assigning a policy map to the output side of an interface not
  supported

This is two completely separate errors...the first saying you can't police 
the output of a port, the second saying you can't even define an output 
service-policy for a port.

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 as 
being able to create a number of arbitrarily sized policing service 
policies, applying one to each policed port...and only allows shaping 
classified traffic by dscp marking it on input and then shaping it to 
port-rate/N where N is an integer from 0 to 65535.  I suppose that's fine 
if I want to shape classified traffic to 1/2, 1/3, 1/4, etc. of the 
interface rate...but what if the interface rate is 100mbit/s and I want to 
shape a class of traffic on a particular port's egress to 60mbit/s?

Is this possible on the 3560?

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