Dell PowerConnect 8024 User Configuration Manual page 930

2 Relay DNS packets received on VLAN 10 to 192.168.40.43
console(config-if-vlan10)#ip helper-address
192.168.40.35 domain
console(config-if-vlan10)#exit
3 Relay SNMP traps (port 162) received on VLAN 20 to 192.168.23.1
console(config)#interface vlan 20
console(config-if-vlan20)#ip helper-address
192.168.23.1 162
4 The clients on VLAN 20 have statically-configured network information,
so the switch is configured to drop DHCP packets received on VLAN 20
console(config-if-vlan20)#ip helper-address
discard dhcp
console(config-if-vlan20)#exit
5 DHCP packets received from clients in any VLAN other than VLAN 10
and VLAN 20 are relayed to 192.168.40.22.
NOTE:
applies to all interfaces except VLAN 10 and VLAN 20. IP helper commands
issued in Interface Configuration mode override the commands issued in
Global Configuration Mode.
console(config)#ip helper-address 192.168.40.22
dhcp
6 Verify the configuration.
console#show ip helper-address
IP helper is enabled
I/F
----
Vl10
Vl10
Vl20
Vl20
Any
930
Configuring L2 and L3 Relay Features
The following command is issued in Global Configuration mode, so it
UDP Port Discard
-------- -----
domain No
dhcp No
dhcp Yes
162 No
dhcp No
Hit Count Server Address
--------- ---------------
0 192.168.40.43
0 192.168.40.35
0
0 192.168.23.1
0 192.168.40.22