[cisco-voip] 7940 7960 wont grab ip from dhcp off switch

[ash AD]

If you are dot1q trunking to the phone, try setting the native VLAN on the trunk to the phone that you would like it to DHCP from. This worked to fix bugs on older 3524XL switches. I am sure you have tried this but, have you erased the phone configurationson the phones (option 33)? Good luck.
   
  Peter

James Grace <jgrace at digitelusa.net> wrote:
  What I notice also, is the these phone are getting address from the data
remote dhcp server. But when you look at the setting on the phone it has
the correct vlan id 

-----Original Message-----
From: Jonathan Charles [mailto:jonvoip at gmail.com] 
Sent: Friday, June 23, 2006 11:05 PM
To: Ted Nugent
Cc: Wydra, Jason; James Grace; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] 7940 7960 wont grab ip from dhcp off switch

Another fun thing is if there is a rogue VLAN sitting in the vlan
database...

Do a show vlan and see if there are VLANs on the switch that don't
make sense to you... if so, go into VLAN database and delete them...

Also, note the fact that you CANNOT configure a 3550, 3560 or 3570 to
have a voice vlan and configured as a trunk port... the voice vlan is
ignored...



Jonathan

On 6/23/06, Ted Nugent wrote:
> Another Problem I've seen that could be contributing
> to this is if you set the access vlan and voice vlan
> the same. (I think it's a bug but have not
> investigated it).
> sw acces vlan 4
> sw voice vlan 4
> Changing to a different access vlan typically fixes
> this. Also mokeying with the DHCP properties have
> caused the same problem and simply changing the access
> vlan to to something else and changing it back
> resolves the problem. You may need to down the sw port
> to get this to take.
>
>
> --- "Wydra, Jason" wrote:
>
> > Are you doing true trunking (encap dot1q) on these
> > ports or are you
> > doing an access vlan and voice vlan?
> >
> > -----Original Message-----
> > From: cisco-voip-bounces at puck.nether.net
> > [mailto:cisco-voip-bounces at puck.nether.net] On
> > Behalf Of Jonathan
> > Charles
> > Sent: Friday, June 23, 2006 9:39 PM
> > To: James Grace
> > Cc: cisco-voip at puck.nether.net
> > Subject: Re: [cisco-voip] 7940 7960 wont grab ip
> > from dhcp off switch
> >
> > Do they show up in a 'show cdp neighbors'? If not,
> > you may want to
> > enable CDP so the phones can see the voice vlan.
> >
> >
> > Jonathan
> >
> > On 6/23/06, James Grace 
> > wrote:
> > >
> > >
> > >
> > >
> > > We have a 3750 with dhcp scope config on it. We
> > have all type of
> > phone and
> > > wireless ap (cisco) that are pulling from this
> > scope. But for some
> > reason
> > > the 7940s and 7960s are grabing ip from the data
> > remote dhcp server.
> > The
> > > switch is not recognizing these phones
> > >
> > >
> > >
> > > James D. Grace
> > >
> > > CCNP CCNA MCSE MCDBA
> > >
> > > Sr. System Engineer / Professional Svc.
> > >
> > > Digitel Corporation
> > >
> > >
> > > _______________________________________________
> > > cisco-voip mailing list
> > > cisco-voip at puck.nether.net
> > >
> > https://puck.nether.net/mailman/listinfo/cisco-voip
> > >
> > >
> > >
> > _______________________________________________
> > cisco-voip mailing list
> > cisco-voip at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-voip
> >
> >
> > _______________________________________________
> > cisco-voip mailing list
> > cisco-voip at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-voip
> >
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
>
---



---


_______________________________________________
cisco-voip mailing list
cisco-voip at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip


				
---------------------------------
Want to be your own boss? Learn how on  Yahoo! Small Business. 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://puck.nether.net/pipermail/cisco-voip/attachments/20060624/38e6eee1/attachment.html