Configuring The Dhcp Relay Agent To Send A Dhcp-Release Request - H3C S5500-EI series Operation Manual

Operation Manual – DHCP
H3C S5500-EI Series Ethernet Switches
Follow these steps to correlate a DHCP server group with a relay agent interface:
Enter system view
Create a DHCP server
group and add a server
into the group
Enter interface view
Correlate the DHCP
server group with the
current interface
Note:
You can specify at most twenty DHCP server groups on the relay agent and at most
eight DHCP server addresses for each DHCP server group.
The IP addresses of DHCP servers and those of relay agent's interfaces cannot be
on the same subnet. Otherwise, the client cannot obtain an IP address.
A DHCP server group can correlate with one or multiple DHCP relay agent
interfaces, while a relay agent interface can only correlate with one DHCP server
group. Using the dhcp relay server-select command repeatedly overwrites the
previous configuration. However, if the specified DHCP server group does not exist,
the interface still uses the previous correlation.
The group-id in the dhcp relay server-select command was specified by the dhcp
relay server-group command.

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

Sometimes, you need to release a client's IP address manually on the DHCP relay
agent. With this task completed, the DHCP relay agent can actively send 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.
To do...
system-view
dhcp relay server-group
group-id ip ip-address
interface interface-type
interface-number
dhcp relay server-select
group-id
Chapter 3 DHCP Relay Agent Configuration
Use the command...
3-5
Remarks
—
Required
Not created by default.
—
Required
By default, no interface is
correlated with any DHCP
server group.