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Enabling the dhcp relay agent on an interface – H3C Technologies H3C WX6000 Series Access Controllers User Manual

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Enabling the DHCP Relay Agent on an Interface

With this task completed, upon receiving a DHCP request from the enabled interface, the relay agent
will forward the request to a DHCP server for address allocation.

Follow these steps to enable the DHCP relay agent on an interface:

To do…

Use the command…

Remarks

Enter system view

system-view

Enter interface view

Interface interface-type
interface-number

Enable the DHCP relay agent on
the current interface

dhcp select

relay

Required
With DHCP enabled, interfaces
work in the DHCP server mode.

If the DHCP client obtains an IP address via the DHCP relay agent, the address pool of the subnet
which the IP address of the DHCP relay agent belongs to must be configured on the DHCP server.
Otherwise, the DHCP client cannot obtain a correct IP address.

Correlating a DHCP Server Group with a Relay Agent Interface

To improve reliability, you can specify several DHCP servers as a group on the DHCP relay agent and
correlate a relay agent interface with the server group. When the interface receives requesting
messages from clients, the relay agent will forward them to all the DHCP servers of the group.

Follow these steps to correlate a DHCP server group with a relay agent interface:

To do…

Use the command…

Remarks

Enter system view

system-view

Create a DHCP server group and
add a server into the group

dhcp relay server-group

group-id

ip

ip-address

Required
Not created by default.

Enter interface view

interface

interface-type

interface-number

Correlate the DHCP server group
with the current interface

dhcp relay server-select

group-id

Required
By default, no interface is
correlated with any DHCP server
group.