[cisco-voip] 7936 DHCP issue

[Jonathan Charles]

OK.

Are there other phones on this switch?

Is the switch running layer 3?

Is there an ip helper address going to the voice dhcp server?



J

On 2/20/06, Jonathan Charles <jonvoip at gmail.com> wrote:
>
> We have had this problem dozens of times.
>
> Here's the problem, the 7935/36 are made by Polycom, not Cisco and they
> have serious trouble with getting VLAN info via CDP.
>
> Solution?
>
> Nail the port down into the voice vlan.
>
> switchport access vlan 100 (or whatever your voice vlan is)
>
> And the phone will come up with an IP on the right vlan.
>
>
>
> Jonathan
>
> On 2/20/06, Voll, Scott <Scott.Voll at wesd.org> wrote:
>
> >  Sounds like a possible DNS issue.  I had a problem were I have a PIX
> > and the Voice vlan could NOT get to the DNS server and it did the same kind
> > of idea.
> >
> >
> >
> > Scott
> >
> >
> >  ------------------------------
> >
> > *From:* cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net]
> > *On Behalf Of *Mike Mike
> > *Sent:* Monday, February 20, 2006 1:08 PM
> > *To:* cisco-voip at puck.nether.net
> > *Subject:* [cisco-voip] 7936 DHCP issue
> >
> >
> >
> > Conference phone gets plugged into a port on the first voice vlan and
> > gets an IP from the DHCP pool no problem. Customer moves to another
> > switchport (same switch) configured on one of the other voice vlans and it
> > takes several hours to pull a new IP. Customer is using a different voice
> > vlan for each of three floors. The 7936 has the latest firmware but also
> > experienced the problem on previous version. Also, a new conf phone has been
> > tried with same results. Moving 7940's and 7960's between floors works just
> > fine. Last test was to create reservations in each pool but apparently that
> > didn't work. Anyone else seen this behavior with the 7936?
> >
> > Thanks
> >
> > _______________________________________________
> > cisco-voip mailing list
> > cisco-voip at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-voip
> >
> >
> >
>
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