Cisco IOS Configure DHCP Relay with IP Helper Address

Network Topology

Router1 Configuration Commands

Router1>enableRouter1#configure terminalRouter1(config)# interface fastEthernet 0/0Router1(config-if)#ip address 172.16.1.1 255.255.255.0Router1(config-if)#no shutdownRouter1(config-if)#exitRouter1(config)#service dhcpRouter1(config)#ip dhcp pool MAIN-POOLRouter1(dhcp-config)#network 192.168.10.0 255.255.255.0Router1(dhcp-config)#default-router 192.168.10.1Router1(dhcp-config)#dns-server 192.168.10.2Router1(dhcp-config)#exitRouter1(config)#ip dhcp excluded-address 192.168.10.1 192.168.10.10Router1(config)#ip route 192.168.10.0 255.255.255.0 172.16.1.2

Router0 Configuration Commands

Router0>enableRouter0#configure terminalRouter0(config)# interface fastEthernet 0/1Router0(config-if)#ip address 172.16.1.2 255.255.255.0Router0(config-if)#no shutdownRouter0(config)# interface fastEthernet 0/0Router0(config-if)#ip address 192.168.10.1 255.255.255.0Router0(config-if)#ip helper-address 172.16.1.1Router0(config-if)#no shutdown

Router1 DHCP Commands

Router1>enableRouter1#show ip dhcp pool MAIN-POOL

Router1#show ip dhcp binding

Cisco Packet Tracer File

net4 dhcp relay.pkt