In my organisation , i have a video conferencing unit that is natted with public IP for remote party to dial-in by IP. Now the new requirment is i need to reserve 6 Mbps of bandwidth for video/voice traffic (in/out) out of my total 32 Mbps internet bandwidth.Below is the network scenario.
We have two location ( Head quarter & Branch location) . The branch location is connected to Head Quarter over the MPLS connection of 100 Mbps.
The head quater is connected with internet connection of 32 Mbps and the branch location is accessing the internet service over MPLS WAN link. The video conferencing unit is connected on Branch location only.
First we need to set an expectation: It's not possible to prioritize bandwidth inbound from the internet. The provider edge router at your Internet carrier would need to prioritize the video packets as they egress their router under the 32Mbps policer they have applied. This of course isn't an option. Prioritizing them at ingress on your HQ-Router is pointless since the access rate of the Ethernet interface cannot be overrun by 32Mbps worth of traffic. All you can do is prioritize the egress traffic toward the Internet.
Additionally you need to speak with your MPLS carrier on the 100Mbps link between the Branch and HQ. If it's MPLS you do not have a psuedo-wire or point-to-point link; congestion within the carrier could easily impact your video traffic. You need the carrier to also do differentiated service and offer an improved SLA for the 6Mbps worth of video traffic you want to pass through them.
To answer your subinterface question: The policy-map should be applied to the physical interface of the HQ-Router, not the subinterface. It will work apply all sub-interfaces since all of those sub-interfaces are sharing the same bandwidth (i.e. the Ethernet interface).
With regards to your inability to add the priority command on ingress: The 6500's support of MQC depends heavily on what line/feature cards you have installed. Here's the documentation on it; I suggest spending some time reading through this:
So as per the advice i should apply the service policy in outbound direction of interface that is pointing to Internet Service Provider. And also i will apply it on parent interface instead of sub-interface.
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