Hierarchical traffic policies - i.e. service-policy inside a

From: Paul Zugnoni (paulzugnoni@gmail.com)
Date: Thu Oct 18 2007 - 00:03:39 ART

I'm working with hierarchical traffic policies, and trying to understand
some order of operation, conflict resolution, and matching rules when using
service-policy inside a policy-map.

Regarding the below sample config from Cisco,

* What happens a packet is processed by class-default in policy-map parent,
but doesn't match the class voice? Would the priority 50 still have an
effect?

* What happens if your child policy marks traffic with something like AF23
and the parent policy is configured to mark the traffic from the same class
as something else, like the default (000000) - which marking statement
overrides the other?

* Can a child policy, like the one below, be an LLQ, and the parent policy
be an LLQ? If so, how are the parent and child priority queues managed?

Router(config)# policy-map child
Router(config-pmap)# class voice
Router(config-pmap-c)# priority 50

Router(config)# policy-map parent
Router(config-pmap)# class class-default
Router(config-pmap-c)# shape average 10000000
Router(config-pmap-c)# service-policy child

from:
http://cisco.com/en/US/products/ps6350/products_configuration_guide_chapter09186a00808029ea.html#wp1060235

Thanks in advance!
Paul

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