How to flush the DHCP server

When configuring the DHCP server on the O2 Wireless Box II/III/IV, statically-assigned IP addresses can interfere with the ability to edit the DHCP server IP address pools. Read below on how to clear/flush the DHCP server.

1) Open a Command Prompt and telnet to 192.168.1.254 (Windows Vista and Windows 7 users without telnet, see bottom of page)

2) Log in with Username: SuperUser. The password is either O2Br0ad64nd or the serial number of your router printed on its underside (excluding the bit in brackets).

3) Paste in these lines (use the little icon at the top-left of the Command Prompt window in order to paste):

dhcp server lease flush
exit

At this point all DHCP leases should be deleted and the DHCP server pool should be open to editing. Click "Back" on your browser to return to the previous page.

Special note for Windows Vista and Windows 7 users: telnet is not installed by default. Go to:

Control Panel > Programs > Turn Windows features on or off

Put a tick in "Telnet Client" and click "OK"