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

[Ryan Ratliff]

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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