Configuring The Dhcp Relay Agent To Send A Dhcp-Release Request; Configuring The Dhcp Relay Agent To Support Option 82 - 3Com 4500G Family Configuration Manual

Follow these steps to enable unauthorized DHCP server detection:
To do...
Enter system view
Enable unauthorized DHCP
server detection
With the unauthorized DHCP server detection enabled, the device puts a record once for each DHCP
server. The administrator needs to find unauthorized DHCP servers from the log information. After the
information of recorded DHCP servers is cleared, the relay agent will re-record server information
following this mechanism.

Configuring the DHCP Relay Agent to Send a DHCP-Release Request

This task allows you to release a client's IP address manually on the DHCP relay agent. After you
configure this task, the DHCP relay agent actively sends a DHCP-RELEASE request that contains the
client's IP address to be released. Upon receiving the DHCP-RELEASE request, the DHCP server then
releases the IP address for the client; meanwhile, the client's IP-to-MAC binding entry is removed from
the DHCP relay agent.
Follow these steps to configure the DHCP relay agent in system view to send a DHCP-RELEASE
request:
To do...
Enter system view
Configure the DHCP relay
agent to send a
DHCP-RELEASE request

Configuring the DHCP Relay Agent to Support Option 82

Prerequisites
You need to complete the following tasks before configuring the DHCP relay agent to support Option 82.
Enabling DHCP
Enabling the DHCP relay agent on the specified interface
Correlating a DHCP server group with relay agent interfaces
Use the command...
system-view
dhcp relay server-detect
Use the command...
system-view
dhcp relay release ip client-ip
2-7
Remarks
—
Required
Disabled by default.
Remarks
—
Required