QoS - DiffServ marking

[dphoneguy24]

I setup in our lab a 406V2 with an Extreme Summit 200-24 switch to test some QoS scenarios. When I monitor the Extreme Switch QoS profiles, the only switch port I see with traffic transmitting out the Qp6 priority (DiffServ 46)is the port the 406V2 is connected to. I do not see it on the port the IP 5620SW set is connected to. All traffic transmitted here is out the lowest priority. I checked the 5620 tel set and it is getting the DiffServ values of 46 from the IPO when it boots up. Shouldn't VoIP traffic leaving the 5620SW set be marked with these DiffServ points?

dphoneguy24

 

[MrIPO]

I have not put a sniffer on the latest code, but the L3 QOS value should be outputting as DSCP46 which I seem to remember is the default value.
Have you put a Hub and Sniffer in place and confirmed?. When you setup the phone statically one of the last options is the Layer 3 DSCP value you want applied on all RTP packets leaving the phones interface. This is different to the L2 Vlan or 802.1p value.

http://www.iporesource.com

"Launching late 2006

 

[owiseman]

I am using the Extreme Summit 200-24 port switches in my environment. I tagged the phone to use VLAN 2; the PC plugged into the hub port on the IP Phone transmits data untagged using the default management VLAN. I have an IP412 unit with two LAN ports, this allows me to isolate VLAN 2 traffic. Phone manager, voicemail, and all other traffic travels over the untagged management VLAN to the other LAN port on the IP412. VLAN 2 traffic is set to Q6 priority. I am running 7.5 of the extreme operating system.

From the command line on the switch:
Show Port Qos

I show PC data as Q0, and Voice data as Q6. I see data being transmitted as high priority by both the phone and the PBX.

You may be able to use a similar system to isolate and give priority to your voice traffic. If you do get diffserv working, please be share your resolution

 

[janni78]

If you view Options -> View IP Settings -> Quality of Service on the phone does it say L3 Audio 46 ?

 

[dphoneguy24]

Yes - viewing settings on the IP set after it comes up - L2 settings are set to 6 and the L3 DiffServ - signaling is 34, voice traffic is 46. So it is getting these values from the IPO.

 

[janni78]

Do you have a 5610 to test with?

I know I have a bunch of them out sending correct QoS info but don't have any 5620, could be a software issue for that phone.

Just a thought

 

[dphoneguy24]

Janni78

Yes I do, I will give that I try and post my findings. Probably will be a few days before I get to it.

dphoneguy24