Releasing And Renewing Dynamic Addresses; Monitoring Dhcp Client Activity - HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual

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2. Turn off the DHCP client:
ProCurve(config)# no ip address dhcp
This command disables the DHCP client on the interface, which then
immediately sends a message to release its DHCP-assigned address.
3. Re-enter the ip address dhcp command with the keywords for preventing
the interface from taking optional configurations. For example:
ProCurve(config)# ip add dhcp no-default-route no-domain-name no-name-
servers

Releasing and Renewing Dynamic Addresses

You can force an interface to give up the address it has received from a server.
Move to the interface configuration mode context for the DCHP client inter-
face and enter:
ProCurve(config-eth 0/1)# ip dhcp release
Take care when releasing an address; you could inadvertently lock yourself
out of the router. If you are managing the ProCurve Secure Router with a Telnet
or Web connection through that interface, your session will be immediately
terminated. You will not be able to reconnect until a DHCP server issues
another IP address to the interface.
You should then force the interface to request a new address:
ProCurve(config-eth 0/1)# ip dhcp renew
Alternatively, you can configure a static address on the interface.
You should only have to manually force the interface to renew its lease after
releasing an address. The DHCP client will periodically request to keep its
address so that data flow is not disrupted.

Monitoring DHCP Client Activity

If the interface will not take a dynamic address, you should track the DHCP
request process to determine what is going wrong. (For more information on
this process, refer to "DHCP Request Process" on page 13-3.)
To view real-time DHCP client messages, enter:
ProCurve# debug ip dhcp-client
Dynamic Host Configuration Protocol (DHCP)
Managing and Troubleshooting the DHCP Client
13-27