We have a 4503 with Sup II+ running IOS 12.2(37)SG. Our Avaya PBX medpros and clans are connected to the WS-X4548-GB-RJ45 blade. Two ports of that same blade are the uplinks to two 6506 distribution switches.
The uplink ports are L3, and the ports connected to the medpros and clans are of course L2.
Here is an example of the QOS commands and an uplink port config and a medpro connected port config:
qos map dscp 24 25 26 27 28 29 30 31 to tx-queue 4
qos map dscp 32 33 34 35 36 37 38 39 to tx-queue 4
qos map cos 5 to dscp 46
description GHQ-RS6506A G3/2 E215
ip address xxx.xxx.xxx.xxx 255.255.255.252
description Medpro #1
switchport access vlan 910
switchport mode access
qos trust dscp
auto qos voip trust
no cdp enable
service-policy output autoqos-voip-policy
ip address xxx.xxx.18.1 255.255.255.128
The Avaya PBX marks the voice packets with DSCP=46 and the control packets with DSCP=24.
To insure that the uplinks don't zero out the markings, to trust them, do I need to add a voip trust statement to the G1/1 config even though it is an L3 interface?