Alcatel-Lucent 6850-48 参考指南

DHCP Relay Commands

OmniSwitch CLI Reference Guide

page 36-3

Adds or deletes a DHCP server IP address. DHCP Relay forwards BOOTP/DHCP broadcasts to and from 
the specified address. If multiple DHCP servers are used, configure one IP address for each server. 

ip helper address ip_address 

ip helper no address [ip_address]

DHCP server IP address (e.g. 21.0.0.10). 

N/A

OmniSwitch 6400, 6850, 6855, 9000, 9000E

• Using this command enables a Global DHCP Relay service on the switch. When the DHCP Relay is 

specified by the DHCP server IP address, the service is called Global DHCP.

• When the DHCP Relay is specified by the VLAN number of the DHCP request, the service is referred 

to as Per-VLAN DHCP.

• Global DHCP and Per-VLAN DHCP are mutually exclusive. You may only configure one or the other. 

• Use the no form of this command to delete an IP address from the DHCP Relay service. If an address 

is not specified, then all addresses are deleted.

• UPD Relay is automatically enabled on a switch when a DHCP server IP address is defined. There is 

no separate command for enabling or disabling the relay service.

• Configure DHCP Relay on switches where packets are routed between IP networks.

• You can configure up to 256 server IP addresses for one relay service.

-> ip helper address 75.0.0.10

-> ip helper no address 31.0.0.20

Release 6.1; command was introduced.