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Voice over WLAN Controller 4402


I am trying to get QoS running on a 4402 controller and am having some challenges. I have created a Voice VLAN and have placed its SSID into the Platinum Prfile. The port coming out from the controller is setup as a dot1Q trunk.

When I span the controller port and run a sniffer trace I see that phones QoS settings are still being set as best effort 00.

Any recommendations would be appreciated



Re: Voice over WLAN Controller 4402

What does the config on the switch port look like? Is it set to trust the QoS settings from the controller?


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Community Member

Re: Voice over WLAN Controller 4402

hi Eric,

Here is the config on the switch port that connects to the controller.

interface GigabitEthernet0/3

switchport trunk encapsulation dot1q

switchport trunk native vlan 2

switchport mode trunk

switchport priority extend trust

srr-queue bandwidth share 10 10 60 20

srr-queue bandwidth shape 10 0 0 0

queue-set 2

priority-queue out

mls qos trust cos

auto qos voip trust


Super Bronze

Re: Voice over WLAN Controller 4402


When you say it's marked as 00 are you talking COS or DSCP?

If you look at the Platinum QoS profile in the Controller's Web GUI, you'll see a box named 'Wired Protocol' or something like that... This you can change to dot1p, at which point a '6' in a box will appear. Setting this to '5' should bring it in line with other Cisco kit.

I'd also clear off the unnecessary commands on the switch port:

switchport priority extend trust

auto qos voip trust

Finally - if you are using VLAN2 for one of the wired VLANs (especially the Voice VLAN) set the native VLAN to another unused one... the native VLAN won't have any CoS marking on it. Alternatively if you can confirm from your network capture that packets are DSCP marked correctly you can just set the port to 'mls qos trust dscp'.



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Aaron Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!
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