H3C Technologies H3C SecPath F1000-E - Manual (Page 66)

8
Configuring the DHCP Relay Agent to Send
DHCP-RELEASE Messages
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 message that contains the
client’s IP address to be released. Upon receiving the DHCP-RELEASE message, the DHCP server then
releases the IP address of 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 to send DHCP-RELEASE messages:
To do… Use the command… Remarks
Enter system view system-view —
Configure the DHCP relay agent to send
DHCP-RELEASE messages
dhcp relay release ip client-ip Required
Configuring the DHCP Relay Agent to Support
Option 82
Configuration prerequisites
Before performing this configuration, complete the following tasks:
• Enabling DHCP
• Enabling the DHCP relay agent on the specified interface
• Correlating a DHCP server group with relay agent interfaces
Configuration procedure
Follow these steps to configure the DHCP relay agent to support Option 82:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Enable the relay agent to support Option
82 dhcp relay information
enable Required
Disabled by default.
Configure the handling strategy for
requesting messages containing Option
82 dhcp relay information
strategy { drop | keep |
replace }
Optional
replace by default.
Configure
non-user-defined
Option 82 Configure the
padding format for
Option 82
dhcp relay information format
{ normal | verbose
[ node-identifier { mac |
sysname | user-defined
node-identifier } ] }
Optional
normal by default.