Fun one for you guys - ISR 4K QoS

Here is a fun QoS problem I have run into.

Lets say a router has a shared MPLS + Internet circuit (100/100mbps). Both are going out the same external interface but in VRFs and sub interfaces.

Also to make things even more interesting mpls has its own internal interface, and internet has its own internal interface.

You can't apply the NBAR policy on the parent External interface because it does not see any protocols. This then forces me to apply the service policy on the sub-interfaces.

The sub-interfaces get their bandwidth from the parent interface. Would it be safe to apply the QoS policy to both sub-interfaces (100mbps).

My fear is that I have 50% allocated for voice + video. It would then use 50% on vrf A sub interface A and 50% on vrf B sub interface B.

Thoughts?

here is my current QoS design:

class-map match-any REALTIME

match protocol rtp audio

match protocol rtp video

match protocol cisco-phone-audio

match protocol webex-meeting

match protocol webex-app-sharing

match protocol webex-media

match protocol telepresence-media

match protocol sip

match protocol sip-tls

match protocol skinny

match protocol sip

match protocol h323

match protocol rtcp

match protocol telepresence-control

match protocol cisco-phone

match protocol cisco-jabber-audio

match protocol cisco-jabber-video

match protocol attribute category voice-and-video

!

class-map match-any MISSION_CRITICAL

match protocol mgcp

match protocol bgp

match protocol smtp

match protocol vmware-view

match protocol vmware-vmotion

match protocol vmware-vsphere

match protocol radius

match protocol ssh

match protocol attribute category netadmin

!

class-map match-any BUSINESS_CRITICAL

match protocol attribute category consumer-internet

match protocol attribute category consumer-file-sharing

match protocol attribute category browsing

match protocol attribute category email

match protocol http

match protocol https

!

class-map match-any STANDARD

class class-default

!

!

!

!

policy-map QOS

class REALTIME

set dscp ef

priority percent 50

!

class MISSION_CRITICAL

set dscp af41

bandwidth percent 25

!

class BUSINESS_CRITICAL

set dscp af21

bandwidth percent 20

!

class STANDARD

bandwidth percent 5

fair-queue