[Asterisk-Users] OT - Cisco IP Phone and PC in diferent VLANs (with 802.1x)

[Nicholas Kathmann]

Joao Pereira wrote:
> Hello to all
> I would like to know If some of you have already configured an Cisco 
> IP Phone (7940 or 7960) to work in a different VLAN than the PC that 
> is connected through the phone switch?
> I know that this can be done with the Skinny firmware, but I dont if 
> it works with the SIP firmware.
>
> The Cisco technical staff told me that these phones dont support 
> 802.1x but can work as pass-through. This way I can still use the PCs 
> with 802.1x and the phones in the same Ethernet plug.
>
> Did someone made it with the Cisco IP phones? What configuration do I 
> need in the phones and in the switch?
> Thanks
> Joao Pereira
>
If configuring with Cisco switches, I'm pretty sure they pull the 
information for which VLAN to operate in from the switch.  You have to 
configure the switchports on the Cisco switch like so:

interface fastethernet 0/1
   switchport trunk native vlan <your data vlan>
   switchport mode trunk
   switchport voice vlan <your voice vlan>
   spanning-tree portfast trunk

etc.

Thanks,
Nicholas Kathmann, CISSP
Kathmann Consulting, LLC