Can one aggregate-policer be applied to different ports?

From: Hobbs (deadheadblues@gmail.com)
Date: Thu Sep 25 2008 - 21:53:13 ART

Hi, I had a task to limit total bw in VLAN12 to 2 Mbps (along with some
other marking). VLAN12 exists on switch 1. I had the following solution:

mls qos aggregate-policer 2MEG 2000000 250000 exceed-action drop

policy-map VLAN12
  class MAIL
    police aggregate 2MEG
   set precedence 3
  class WEB
    police aggregate 2MEG
   set precedence 2
  class class-default
    police aggregate 2MEG

interface FastEthernet0/1
 service-policy input VLAN12

interface FastEthernet0/2
 service-policy input VLAN12

The solution created separate aggregate-policers because it said the same
one can't be used on multiple ports. However the switch let me apply it.
Normally when qos features aren't allowed, the switch says something.

If I did create separate 2Mbps aggregate policers (and create another
policy, one for each interface) like the solution then technically 4 MEG
would be allowed, right? That would be 2Mbps in each port...

I have been reading the QOS section section of 12.2 for 3560 and can't find
where it says aggregate-policers can't span ports.

Is this true? If so, can you point me where in the doccd?

thanks,

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