QOS deployment 3850 avaya phones

Question

Hai
we are going to implement a campus network with 3850 switch stack and 4500x distribution and 6500 core.
the ip telephony system is avaya,i need to provide end to end  qos support.
Anybody help .suggestions,i prefer service policy model .
video conferencing also there 
Other than trusting dscp on specific phone port 
i need to differentiate multimedia conferencing traffic and voip traffic with access list.
suggestions please 
thank you

Answer 1

Hello
You can treat the Avaya Phones the same way you treat the Cisco Phones(Just no CDP, and sometimes no LLDP also).The Cisco SRND guide advises that you extend the trust boundary where you start trusting markings to the phones themselves(Cisco Collaboration System 9.x Solution Reference Network Designs (SRND).
You can set the Avaya Phone's QOS settings in their ip-network-region configuration(You can also set codecs on the ip-codec-set screen). I feel like doing this limits your configuration and management problems.And you can also do the same thing to your Video Endpoints.
Should this not be adequate for you can try using the VLAN or dst address, access-list and policy map remarking model:
Since you will assign a specific dhcp scope/vlan to voice you can write a class map statement to match traffic from that scope and remark them using an access list or you can write the class map statement to match a destination address(Which would be the destination address of the Avaya Call Server or in an older Avaya Environment the CLAN cards where the phones will register). This by definition means you will need to do this on every Access Layer Switch in your environment.
Kindly vote or mark question as answered.Thanks