I am configuring a (powerconnect 3548P) switch for both data and voice, with VLAN1 for data (untagged) and VLAN100 for voice (tagged). Both the PC and IP phone are picking up the right IP addresses, but I am stuck on the configuring of QoS.
I am trying to set the QoS trust as DSCP both from a command line and the GUI but is returns an error of "Voice VLAN and advanced mode/no qos/trust dscp configuration prevention'.
I know it must be something simple but it's doing my head in as I cannot see what I'm doing wrong.
I have the same issue. My 3548 is in - Qos: basic, Basic trust: vpt.
If I try to issue the command "(config)# qos advance ", the switch doesn't know that command. I get a wrong number of parameters or invalid range. My switch is running SW version 2.0.0.40.
I was able to create the vlan using the answers in the above replies. Only issue I have now is when I run the voice vlan enable command against a port it gives me the following error:
Configuration cannot be applied in the current port mode
Port config as follows:
interface range ethernet 1/e(1-48),2/e(1-48),3/e(1-48),4/e(1-48)
spanning-tree portfast
(port im working on is 4/e34)
Do I have to put the port into trunk mode? as the data vlan is 1 and the voice vlan is 1200
Set the IP manually on the phone... no luck. Cant ping the IP etc. I'm thinking the port channel from the core to the dell stack is not passing on that vlan.
While I was typing this I found that vlan 1200 was not allowed on the port channel on the dell switch. The core now can ping the vlan. Still cant ping the phone from the switch, I will do some more testing... if anyone has some suggests let me know.
I set the phone's discovery mode to Manual VLAN and DHCP. Set the VLAN as 1200. Phone is now getting an IP from Vlan 1200 and the attached PC is getting an IP from VLAN 200. Question is I thought by adding the mac address to the oui table this process was meant to happen automatically?
Anaraendil
72 Posts
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Posted March 14th, 2011 04:00
Hi,
Did you enable QoS globally on your switch? It must be set in basic mode. Can you print here show qos output?
And are you sure that IP phone will send traffic with DSCP field, not CoS?