[cisco-voip] 7970 won't release IP address

[Candace Holman]

I did a static binding on the MAC address and it works.  I suspect the 
server is caching the previously served IP address.

Candace

Ryan Ratliff wrote:

> What does a sniffer capture show?  If the IP phone resets when you 
> tell it to release the IP address then it's most likely just getting 
> the same IP address back from the DHCP server.
> If it doesn't reset at all I would suspect the phone is not actually 
> sending the release.
>
> -Ryan
> On Aug 3, 2005, at 3:44 PM, Candace Holman wrote:
>
> I happened to reassign a dynamic DHCP address from our voice vlan to a
> static device, but neglected to immediately change the DHCP
> availability.  I tried to use the "release address" option on a 7970 so
> that it would get a new address, and it just would not  release the
> dynamically obtained IP address.  I notice similar behavior on a 7960 -
> it will not get a new IP address even when I ask it to release the
> previously held IP address.  On the 7970, I even hard-coded a different
> ip address, and it worked, but when I re-enabled DHCP it picked up the
> old, undesirable IP address!
>
> Is this more likely a bug in the DHCP service (Cisco NetRegistrar), or a
> phone firmware bug?
>
> Candace
>
>
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