[c-nsp] 6500 policy map question

[Peter Rathlev]

On Mon, 2013-05-20 at 13:14 -0400, Randy wrote:
> When applying the same rate limiting policy map to multiple Vlans (6500 
> 3BXL), do policers work with separate buckets on each Vlan or do they 
> all share a common bucket with the parent class map?  In otherwords, 
> could one Vlan getting flooded affect others on the same policy map?

That depends on what kind of policer you use. There are three different
types on a Sup720: per-interface, aggregate and microflow.

The first is completely "per interface" and no amount of traffic
flooding on one interface would affect the other interfaces even when
using the same policy-map.

Aggregate (or "named") policers are shared among all ports on which you
apply them.

Microflow policers police each flow separately.

I think there's something special about egress policing though I can't
remember what at the moment. Take a look at this for details:

http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00801c8c4b.shtml

-- 
Peter