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New Member

VoIP - IPhone & Desktop

Thinking of introducing voip in our network. Have Cisco 2960 switch and Cisco Catalyst 500 switches.

Have one of the ip phones with 2 x 10/100 interfaces. Idea being to connect a desktop PC to one of the ports.

The best practice is to set up a voice VLAN and data VLAN.

How should the link between the IP Phones and the Cisco switch be set up? As a Dot1Q Trunk? Is that possible?


Re: VoIP - IPhone & Desktop

this is voice vlan config for 2960 from


interface FaX/Y

switchport trunk native vlan [datavlan]

switchport trunk allowed vlan [voicevlan],[datavlan]

switchport mode trunk

switchport voice vlan [voicevlan]

Hall of Fame Super Gold

Re: VoIP - IPhone & Desktop

Actually I use

switchport mode access [datavlan]

switchport voice vlan [voicevlan]

I prefer this over leaving user ports in trunk mode.

New Member

Re: VoIP - IPhone & Desktop

what does the following mean?

from the link above:

Note: Voice VLAN is only supported on access ports and not on trunk ports, even though the configuration is allowed.

New Member

Re: VoIP - IPhone & Desktop

can someone plz point me to qos commands for voip.


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