Policy map using policy map

I have been given a template configuration for a DSCP based QoS.

So the incoming traffic policy map marks the traffic accordingly, and
then the WAN interface calls policy map S-QUEUE to decide how
to handle the outbound traffic which in turn calls policy map QUEUE.

policy-map S-QUEUE
class class-default
shape average 1048000
service-policy QUEUE

policy-map QUEUE
class M-QUEUE !dscp ef
priority 1032
class I-QUEUE !dscp af31
bandwidth 16
class class-default !the rest
fair-queue
random-detect dscp-based

Somehow I am stuck trying to figure out why not have the WAN
interface use QUEUE instead of using S-QUEUE. The WAN
bandwidth is 10Mb.

Geoffrey Sinclair
Remove the nb for email.

 

This is a hierarchical policy map.

The top level (parent) map applies traffic shaping
and then the child map is applied to the4 result.
This is the documented method of doing traffic
shaping.