[cisco-voip] Re: Configuring VoIP on 3750s

[Mike Armstrong]

Yes, our older switches are all either 3524-PWR-XLs or 2900XLs.  I'll try 
your suggestion; thanks.

Mike

> Date: Mon, 12 Dec 2005 11:02:32 -0500
> From: "Ortiz, Carlos" <CORTIZ at broward.org>
> Subject: RE: [cisco-voip] Configuring VoIP on 3750s
> To: "Mike Armstrong" <mfa at ufl.edu>
> Cc: cisco-voip at puck.nether.net
> Message-ID:
> <26B357EF9FB7D04A989C9E82A9E5436E01BC2B48 at MREXVS01.bc.broward.cty>
> Content-Type: text/plain; charset="us-ascii"
>
> Looks like you are using the old style configuration that required the
> encapsulation commands, etc. Are you upgrading from the old 3524XL
> series? My 3750 ports look like this....
>
>
> switchport access vlan 10
> switchport mode access
> switchport voice vlan 100
> switchport port-security
> switchport port-security maximum 3
> no ip address
> srr-queue bandwidth share 10 10 60 20
> srr-queue bandwidth shape  10  0  0  0
> mls qos trust device cisco-phone
> mls qos trust cos
> no mdix auto
> auto qos voip cisco-phone
> spanning-tree portfast
>
>
> Would this work for you?
>
> Carlos
> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Mike Armstrong
> Sent: Monday, December 12, 2005 10:35 AM
> To: cisco-voip at puck.nether.net
> Subject: [cisco-voip] Configuring VoIP on 3750s
>
> We just installed a WS-C3750-48P and transferred the port configuration
> from
> two 3524s to it.  One 7940 refuses to come up, stopping with an
> "Ethernet
> disconnected" message.  We replaced it with another 7940 and all is
> well.
>
> While investigating, I actually read the 3750 Software Configuration
> Guide
> for 12.2(25)SED, and it it says "...voice VLAN is not supported on trunk
>
> ports."  (p. 15-3.) Their example configuration of a 7960 shows only:
>
>  mls qos trust cos
>  switchport voice vlan dot1p
>
> whereas we've been using something like
>
> switchport trunk encapsulation dot1q
> switchport trunk native vlan 103
> switchport trunk allowed vlan 1,2,103,1002-1005
> switchport mode trunk
> switchport voice vlan 2
> spanning-tree portfast
>
> on the 3524s, and in fact this seems to work on all the other phones
> we've
> connected to the 3750 so far.  I'm willing to accept that this
> particular
> phone might need some TAC attention, but my main question at this point
> is:
> If you can't configue the voice VLAN on a trunk port, how do you set the
>
> VLAN for the switchport on the phone?  We have no intention of extending
>
> trust past the phone, and have to set different VLANs for several
> different
> applications.
>
> Mike Armstrong
> UF/IFAS CREC
> Lake Alfred, FL