# Cisco IOS Configure DHCP Relay with IP Helper Address

#### Network Topology

[![dhcprelaytopo.pkt.png](https://bookstack.taylorhome.run/uploads/images/gallery/2022-12/scaled-1680-/dhcprelaytopo-pkt.png)](https://bookstack.taylorhome.run/uploads/images/gallery/2022-12/dhcprelaytopo-pkt.png)

#### Router1 Configuration Commands

Router1>enable  
Router1#configure terminal  
Router1(config)# interface fastEthernet 0/0  
Router1(config-if)#ip address 172.16.1.1 255.255.255.0  
Router1(config-if)#no shutdown  
Router1(config-if)#exit  
Router1(config)#service dhcp  
Router1(config)#ip dhcp pool MAIN-POOL  
Router1(dhcp-config)#network 192.168.10.0 255.255.255.0  
Router1(dhcp-config)#default-router 192.168.10.1  
Router1(dhcp-config)#dns-server 192.168.10.2  
Router1(dhcp-config)#exit  
Router1(config)#ip dhcp excluded-address 192.168.10.1 192.168.10.10  
Router1(config)#ip route 192.168.10.0 255.255.255.0 172.16.1.2

#### Router0 Configuration Commands

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

#### Router1 DHCP Commands

Router1>enable  
Router1#show ip dhcp pool MAIN-POOL

[![image.png](https://bookstack.taylorhome.run/uploads/images/gallery/2022-12/scaled-1680-/image.png)](https://bookstack.taylorhome.run/uploads/images/gallery/2022-12/image.png)

Router1#show ip dhcp binding

[![image.png](https://bookstack.taylorhome.run/uploads/images/gallery/2022-12/scaled-1680-/SJLimage.png)](https://bookstack.taylorhome.run/uploads/images/gallery/2022-12/SJLimage.png)

#### Cisco Packet Tracer File

[net4 dhcp relay.pkt](https://bookstack.taylorhome.run/attachments/3)