3com 5500-SI Manual De Usuario

C

HAPTER

 17: N

ETWORK

 P

ROTOCOL

 O

PERATION

DHCP relay configuration is described in the following sections: 

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■

■

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Be sure to enable DHCP before you perform other DHCP relay-related configuration, 
for other DHCP-related configurations cannot take effect with DHCP disabled.

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. 

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. 

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

Configure IP address for DHCP server

 groupNo ip ipaddress1 [ 

 ]

Delete all DHCP server IP addresses (set 
the IP addresses of master and backup 
DHCP servers to 0)

 groupNo

Table 282   Configuring the DHCP Server Group Corresponding to VLAN Interfaces

Configure DHCP server group corresponding to VLAN interfaces dhcp-server groupNo

Delete DHCP server group