Default Route - HP ProCurve 7000dl Series Basic Management And Configuration Manual

Dynamic Host Configuration Protocol (DHCP)
Configuring a Router Interface as a DHCP Client
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Move to the interface configuration mode context. Then enter the ip address
dhcp command with the keyword for the configuration that you do not want
the router to accept:
Syntax: ip address dhcp [no-default-route | no-domain-name | no-name-servers]
To disable more than one configuration, string the keywords together in the
same command. For example, enter:
ProCurve(config-fr 1.1)# ip address dhcp no-default-route no-domain-name
You must trust the DHCP server and be absolutely clear on what configura-
tions it will send the interface. An incorrect domain name and default route
could disrupt the entire network.
If the interface has already received configurations that it should not have,
you must release the address. Enter no ip address dhcp, and then re-enter
the ip address dhcp command with the keywords to reject the configurations.
Attaching a Network Monitoring Track to the DHCP

Default Route

As a part of network monitoring, you can attach a network monitoring track
to the DHCP client to monitor the default route sent as part of the configura-
tion. A track uses probes to test connections to remote endpoints with the
goal of either removing failed routes or logging poor network performance.
To add the DHCP default route as a monitored route, use the track option
with the ip address dhcp command. You can combine the track option with
any of the other options for the ip address dhcp command (except no-
default-route—the router cannot monitor a route that the interface does not
accept).
For example, enter this command when you enable DHCP on a Frame Relay
subinterface:
ProCurve(config-fr 1.101)# ip address dhcp track DHCPDefault
Before entering the command, you should create the track named DHCPDe-
fault. Also, you should create a probe to test the route. For example, the probe
could test connectivity to the default gateway listed in the DHCP default route.
If the probe fails to reach the gateway, the track determines that the default
route has failed and removes it. For more information about network moni-
toring and configuring tracks and probes, see the Advanced Management and
Configuration Guide, Chapter 9: Network Monitoring.