Technical data

DHCP Relay 65
Then the server transmits the configuration information to the clients through the
DHCP relay, thereby, completing the dynamic configuration of the client.
Configuring DHCP is described in the following sections:
■ Configuring DHCP Relay
■ Troubleshooting a DHCP Relay Configuration
Configuring DHCP Relay DHCP relay configuration includes tasks described in the following sections:
■ Configuring a DHCP Server IP Address in a DHCP Server Group
■ Configuring the DHCP Server Group for the VLAN Interface
■ Configuring the Address Table Entry
■ Enabling/Disabling DHCP Security Features
■ Displaying and Debugging DHCP Relay
The server IP address is associated , through its DHCP server group, with a specific
VLAN interface. This implementation differs from others in which the server IP is a
global parameter.
Configuring a DHCP Server IP Address in a DHCP Server Group
Perform the following configuration in System view.
The backup server IP address cannot be configured independently, instead, it has
to be configured together with the master server IP address.
By default, the IP address of the DHCP Server is not configured. The DHCP Server
address must be configured before DHCP relay can be used.
Configuring the DHCP Server Group for the VLAN Interface
Perform the following configuration in VLAN interface view.
When associating a VLAN interface to a new DHCP server group, you can
configure the association without disassociating it from the previous group.
By default, VLAN interfaces have no associated DHCP server group.
Table 8 Configure/Delete the IP Address of the DHCP Server
Operation Command
Configure the IP address for a DHCP Server dhcp-server groupNo ip ipaddress1 [
ipaddress2 ]
Remove all the IP addresses of the DHCP
Server (set the IP addresses of the primary and
secondary servers to 0).
undo dhcp-server groupNo
Table 9 Configure/Delete the Corresponding DHCP Server Group of VLAN Interface
Operation Command
Configure the DHCP server group for the
VLAN interface
dhcp-server groupNo
Delete the DHCP server group for the VLAN
interface
undo dhcp-server