HP ProCurve 7000dl Series Basic Management And Configuration Manual page 399

ADSL WAN Connections
ADSL Modules for the ProCurve Secure Router
Setting the Administrative Distance. You can specify the administrative
distance to use when adding the DHCP gateway into the route table. The router
uses the administrative distance to determine the best route when multiple
routes to the same destination exist. The router assumes that the smaller the
administrative distance, the more reliable the route is.
For example, to set an administrative distance of 5, enter:
ProCurve(config-atm 1.1)# ip address dhcp 5
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.
You can configure the ATM subinterface as an unnumbered interface. The ATM
subinterface will then use the IP address of the interface you specify. The
Secure Router OS uses the IP address of the specified interface when sending
routing updates over the unnumbered interface.
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