[cisco-voip] Simple VOIP question: Switch related

[Matthew Linsemier]

Do you have CDP enabled on the switch?  Cisco phones use CDP voice vlan
functionality.

Matt


On 7/22/08 1:00 PM, "Jeff Cartier" <jcartier at acs.on.ca> wrote:

>  
> I¹m having the worst time trying to figure out a problem.
>  
> The issue is that a 7912 phone seems to be getting an IP address in the data
> subnet.  We¹ve tried two configurations on the switchport level and neither
> are workingŠ
>  
> Interface fa0/1
> switchport mode access
> switchport voice vlan 2
> srr-queue bandwidth share 10 10 60 20
> priority-queue out
> mls qos trust cos
> auto qos voip trust
> spanning-tree portfast
>  
> AND/OR
>  
> Interface fa0/1
> Switchport mode trunk
> switchport trunk encapsulation dot1q
> switchport voice vlan 2
> srr-queue bandwidth share 10 10 60 20
> priority-queue out
> mls qos trust cos
> auto qos voip trust
> spanning-tree portfast
>  
> And yet the phone keeps receiving an IP address in the data subnet.
>  
> We¹ve verified the following:
> - helper-address on the router
> - correct DHCP scope
>  
>  
> 
> 
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