[A*UG] Polycom and DHCP

[Pehr Jansson]

Hi Jim

We had some pretty interesting DHCP problems with our Polycom 501  
phones.

We traced down the problem to which machine is running the DHCP  
server and resolved the problem by activating the DHCP server on the  
AAH box.

Everything worked when we first connected the phones and they  
received their addresses from a Linksys WRT54G.  On the same network  
we also have a Netgear router.  At one point in our trials and errors  
we (inadvertently) had both the netgear router and the Linksys run  
DHCP servers.  That of course caused some problems.  We disabled the  
DHCP on the Linksys and the next time we rebooted the phones, they  
did not work.  It seems that Polycom phones do not speak to all DHCP  
servers.  We also tried running a DHCP server on a Windows machine  
and the Polycom phones still could not receive it.  Ultimately, we  
activated the DHCP server on the AAH box.  That has worked fine.  I  
was trying to find the web page that I used, but cannot seem to put  
my finger on it. If you need our config file for a model, let me know.

Regards,

Pehr

On Feb 21, 2006, at 10:26 AM, Jim Freeze wrote:

> Hello
>
> Thanks all for the help last night. When I got home, I reconnected  
> my system, and
> the phone did not connect to the AAH server. A quick investigation  
> revealed the problem,
> but not the root cause. The problem is that the phone gets assigned  
> 10.0.1.4 while the
> AAH box gets assigned 192.168.15.5, even though both are on the  
> same network.
>
> Here is the setup
> (hopefully gmail won't mess this up too much)
>
> AAH box: 192.168.15.5 -----+---+
>                            |hub|----rtr----nat/rtr---> ISP/internet
> Polycom: 10.0.1.4 ---------+---+
>
> I even unplugged the AAH box from the hub to make sure that the  
> polycom was
> not getting an address from it.
>
> Any ideas why the two would find different dhcp servers? I really  
> don't think a single
> dhcp server is serving out addresses on two different nets.
>
> Thanks
> -- 
> Jim Freeze
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