DELL PC6224F User Manual

IP Helper Commands

This command takes precedence over an ip helper-

address command given in global configuration mode. 

With the following configuration, the relay agent 

relays DHCP packets received on any interface other 

than vlan 5 and vlan 6 to 192.168.40.1, relays DHCP 

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.