HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual page 609

Dynamic Host Configuration Protocol (DHCP)
Configuring a Router Interface as a DHCP Client
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
N o t e
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 re-enter the
command with the keywords to reject the configurations.
Configuring a Static Hostname for an Interface with a
Dynamic Address
Your organization may have a device behind the ProCurve Secure Router that
remote users should be able to reach. For example, customers may need to
access your Web server.
Often, a Web server's address is linked to the public IP address on a router
interface using Network Address Translation (NAT). If the router's interface
changes IP address, the entry for the Web server in the DNS servers' host tables
will no longer be correct. Users will no longer be able to reach the device.
When an interface receives a dynamic IP address from an ISP, its IP address
may change relatively frequently or without warning. In this situation, you
should run dynamic DNS on the router interface to ensure that customers can
always reach a device when they enter its hostname.
The ProCurve Secure Router supports a client that works with Dynamic
Networking Services, Inc. (DynDNS). After you register a hostname with
DynDNS, the dynamic DNS client automatically informs DynDNS whenever
the associated interface's IP address changes. DynDNS propagates the change
throughout its DNS servers so that you do not lose connectivity with your
customers.
See Chapter 12: Domain Name System (DNS) Services to learn how to
configure dynamic DNS.
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