Service-Policy question..

I'm pretty sure I know the answer to this question, but I'm asking to hopefully have someone tell me that I'm wrong.

I have sub-interfaces using DotQ tagging and am using QoS. I have a site that has a switch and not a router and I want to at least turn up QoS for a single direction. The site is going away in 6 months, but would like to throw at least one was QoS on it until it's gone.

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If I add bandwidth and service-policy to the interface, does it only affect the interface and not the sub-interfaces? ie, will the interface be limited to 300mb w/ the QoS policy-map shape average and the sub-interface limited by the other policy-map?

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interface GigabitEthernet0/0/1

ip address x.x.201.1 255.255.255.0

>> service-policy output QoS_300Mb <<

!

interface GigabitEthernet0/0/1.200

description L3 to RTR01

encapsulation dot1Q 200

ip address xx.xx.200.3 255.255.255.254

service-policy output QoS_50Mb