[c-nsp] Data VLAN/Voice VLAN

[Yuri Bank]

Thanks for all of the replies.

I would like to summarize the information I've gathered so far from this thread. Please correct me if I am wrong on any of this.

* If the switchport is in access mode, you must have a CDP compatible phone and CDP enabled on the switchport. When a cisco phone is connected, the trunk will be negotiated and the voice vlan will be tagged. Data will be untagged and accepted as the configured access vlan.

switchport mode access
switchport access vlan 77
switchport voice vlan 66


*If the switchport is in trunk mode, the configured voice vlan will be tagged in the same way, however the data vlan will be the native vlan configured on the switchport.

switchport mode trunk
switchport trunk allowed vlan 77,66
switchport trunk native vlan 77
switchport voice vlan 66

*If the switch supports LLDP then you can have the same configuration as the first, but with none-cisco phones.

ADD:

globally:

lldp run






--- On Mon, 8/31/09, Alan Buxey <A.L.M.Buxey at lboro.ac.uk> wrote:

> From: Alan Buxey <A.L.M.Buxey at lboro.ac.uk>
> Subject: Re: [c-nsp] Data VLAN/Voice VLAN
> To: "Bill Blackford" <BBlackford at nwresd.k12.or.us>
> Cc: "cisco-nsp at puck.nether.net" <cisco-nsp at puck.nether.net>
> Date: Monday, August 31, 2009, 1:51 PM
> Hi,
> > I agree. LLDP is fairly slick. We're currently doing
> it with a non-Cisco switch and Cisco phones in some of our
> smaller sites.
> 
> ..and i noted that LLDP is slowly leaking out as a feature
> on cisco switches -
> recent IOS for 3560 and 2960 switches can speak it...
> service needs to be turned on
> of course.
> 
> alan
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