I have 3 7921 phones. fw 1.1.1
CCM 4.2.3 (Option 150 set)
1100 AP 12.3(8)JEA3 x 1
1242 AP 12.4(10b)JA x 1
1231 AP 12.3(8)JA2 x 2
WEP 128-bit key1
MAC Auth Local list on AP
Occationally the phones will get stuck at 'Configuring IP' and show DHCP timeout. If I statically assign IP phone works fine. If I static assign IP, let it register, then enable DHCP, sometimes it will reregister fine, other times not.
I had two side-by-side and one registered fine, the other is stuck at Config IP.
I can't leave it statically assigned as we have two locations that users travel between and are on different subnets.
I've tried fw 1.2.1 but then phones that do register fine on DHCP fail totally. Seems 1.1.1 is the only on that works.
Also have 9 7920 units that work no problem.