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286 CHAPTER 17: NETWORK PROTOCOL OPERATION
DHCP Relay
Configuration
DHCP relay configuration is described in the following sections:
■ Enabling DHCP
■ Enabling DHCP
■ Configuring the DHCP Server Group for the VLAN Interfaces
■ Configuring the User Address Entry for the DHCP Server Group
■ Enabling/Disabling the DHCP Security Feature on the VLAN interface
Enabling DHCP Be sure to enable DHCP before you perform other DHCP relay-related configuration,
for other DHCP-related configurations cannot take effect with DHCP disabled.
Configuring the IP address for the DHCP server
You can configure a master and a backup DHCP server, which are in the same DHCP
server group, in the same network segment to ensure reliability.
Perform the following configuration in System View.
By default, no IP address is configured for the DHCP server.
Note that you must configure an IP address for the backup DHCP server together with
that of the master server.
Configuring the DHCP Server Group for the VLAN Interfaces
Perform the following configuration in VLAN Interface View.
By default, no DHCP server corresponds to VLAN interfaces.
When associating a VLAN interface to a new DHCP server group, you can configure
the association without disassociating it from the previous group.
Table 280 Enable DHCP
Operation Command Description
Enter system view system-view -
Enable DHCP dhcp enable Required
By default, DHCP is disabled.
Table 281 Configuring the IP Address for the DHCP Server
Operation Command
Configure IP address for DHCP server dhcp-server groupNo ip ipaddress1 [
ipaddress2 ]
Delete all DHCP server IP addresses (set
the IP addresses of master and backup
DHCP servers to 0)
undo dhcp-server groupNo
Table 282 Configuring the DHCP Server Group Corresponding to VLAN Interfaces
Operation Command
Configure DHCP server group corresponding to VLAN interfaces dhcp-server groupNo
Delete DHCP server group undo dhcp-server