HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual page 352

ADSL WAN Connections
ADSL Modules for the ProCurve Secure Router
7-24
Overriding Settings Received from the DHCP Server. If the DHCP
server is configured to provide a default route, a domain name, or the IP
address of a domain name system (DNS) server, the DHCP client for the ATM
subinterface will accept and use these settings. If you do not want to use one
or more of these settings, enter the appropriate options when you enable the
DHCP client:
Syntax: ip address dhcp [hostname <word> | no-default-route | no-domain-name |
no-nameservers]
For example, if you do not want the DHCP client to use the default gateway
and DNS name server addresses that it receives from the DHCP server, enter:
ProCurve(config-atm 1.1)# ip address dhcp no-default-route no-nameservers
Changing a Setting for the DHCP Client. If you want to change a setting
for the DHCP client, you must first disable the client. Then you can enter the
command to enable the client with the setting that you want to change.
Before you disable the client, you should release the IP address obtained
through DHCP. This will prevent the DHCP server from holding the IP address
and allow it to assign the IP address to another client.
Releasing or Renewing an IP address. If you want to manually force the
ATM subinterface to release or renew an IP address, enter these commands
from the ATM subinterface configuration mode context:
ProCurve(config-atm 1.1)# ip dhcp release
ProCurve(config-atm 1.1)# ip dhcp renew
Removing the DHCP Client Setting. If you decide that you no longer
want the ATM subinterface to be a DHCP client, enter:
ProCurve(config-atm 1.1)# no ip address dhcp
Configuring the ATM Subinterface as an Unnumbered Interface. To
conserve IP addresses on your network, you may want to create the ATM
subinterface as an unnumbered interface. When you assign the ATM subinter-
face an IP address, that IP address cannot overlap with the IP addresses
assigned to other interfaces on your network. As a result, each interface that
has an IP address represents an entire subnet. Depending on the subnetting
scheme you use, this could use more IP addresses than you can spare.