[cisco-voip] 7936 DHCP issue

[Jonathan Charles]

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
>
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>
>
>
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