From: James Matrisciano (jmatrisciano@kenttech.com)
Date: Fri May 13 2005 - 16:46:50 GMT-3
With the voice vlan command, that will be the vlan that gets assigned to
the phone. I will also double check this, but I have never seen the
phone do otherwise (cisco IP phone anyway). If you are not in the ccie
lab and are actually trying to figure this out, you can always go to the
phone and look at its configuration, it will show you the vlan
identifier number that it was assigned from what ever switch you are
connected to.
Last ditch effort might be to debug it and see if it is sending and vlan
advertisements to the mac address of the phone...never tried that
before, hell don't even know if that's an option...but could be pretty
cool to test out
jm
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Steve Ohnmacht
Sent: Friday, May 13, 2005 3:17 PM
To: Joiner, Shane
Cc: ccielab@groupstudy.com
Subject: Re: OT: Voice Vlan question
Unfortunately, I do not have a 3550 to actually validate, but the
command reference for show vlan looks promising... I'm curious to see
if any of the options below works for you...
[brief | dot1q tag native | id vlan-id | internal usage | name
vlan-name | remote-span | summary] [ | {begin | exclude | include}
expression]
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12225seb/cr/cl
i2.htm#wp3428485
HTH,
On 5/13/05, Steve Ohnmacht <ohnmacht@gmail.com> wrote:
> Not sure if sh vlan will show fa0/1 bound to both 100 and/or 100.
> Based off the config I would assume that you should see fa0/1 assigned
> to vlan 100 from the sh vlan output... That's something I will need to
> check myself... thanks....
>
> On 5/13/05, Joiner, Shane <SJoiner@seton.org> wrote:
> > With the following interface configuration:
> >
> > Int f0/1
> > switchport access vlan 100
> > switchport voice vlan 101
> > switchport priority extend cos 1
> > mls qos trust device cisco-phone
> > mls qos trust cos
> > no mdix auto
> > auto qos voip cisco-phone
> > spanning-tree portfast
> >
> > How can I tell if the device plugged into the port is using vlan 100
or
> > 101?
> >
> > I can perform a show cdp neighbors and see where phones are
attached.
> > If I perform show interface status then it show the port is in vlan
100.
> > Even spanning tree shows each port participating in both vlans.
> >
> > Thanks,
> > Shane
> >
> >
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