DELL PC7024 User Manual

IP Helper/DHCP Relay Commands

and DNS packets received on vlan 5 to 192.168.40.2, 

relays SNMP traps (port 162) received on interface 

vlan 6 to 192.168.23.1, and drops DHCP packets 

received on vlan 6:

console#config

console(config)#ip helper-address 192.168.40.1 dhcp

console(config)#interface vlan 5

console(config-if-vlan5)#ip helper-address 

192.168.40.2 dhcp

console(config-if-vlan5)#ip helper-address 

192.168.40.2 domain

console(config-if-vlan5)#exit

console(config)#interface 2/6

console(config-if-vlan6)#ip helper-address 

192.168.23.1 162

console(config-if-vlan6)#ip helper-address discard 

dhcp

Use the ip helper enable command to enable relay of UDP packets. To 

disable relay of all UDP packets, use the “no” form of this command. 

IP helper is enabled by default.

Global Configuration mode.

2CSPC4.XCT-SWUM2XX1.book  Page 959  Monday, October 3, 2011  11:05 AM