Dell PowerConnect 6248 Configuration Guide - Page 103
Example 5: Enable IP Helper on a VLAN Routing Interface to a Server DHCP and DNS
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Example 5: Enable IP Helper on a VLAN Routing Interface to a Server (DHCP and DNS) To relay DHCP and DNS packets to 192.168.30.1, use the following commands: console(config-if-vlan100)#ip helper-address 192.168.30.1 dhcp console(config-if-vlan100)#ip helper-address 192.168.30.1 domain Example 6: Enable IP Helper on Multiple VLAN Routing Interfaces With the following configuration, the relay agent relays: • DHCP packets received on any interface other than VLAN 200 and VLAN 300 to 192.168.40.1 • DHCP and DNS packets received on VLAN 200 to 192.168.40.2 • SNMP traps (port 162) received on interface VLAN 300 to 192.168.23.1 • Drops DHCP packets received on VLAN 300 console(config)#ip helper-address 192.168.40.1 dhcp console(config)#interface vlan 200 console(config-if-vlan200)#ip helper-address 192.168.40.2 dhcp console(config-if-vlan200)#ip helper-address 192.168.40.2 domain console(config-if-vlan200)#exit console(config)#interface vlan 300 console(config-if-vlan300)#ip helper-address 192.168.23.1 162 console(config-if-vlan300)#ip helper-address discard dhcp console(config-if-vlan300)#exit Routing Configuration 103