How to configure DHCP Relay Agent on Cisco Routers

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 Here is figure which we have may configure today.

 Assigning Static IP to DHCP Server

To assign a static IP address to the server then Click server---> Config--->Interface--->Select FastEthernet0.
See below the picture

To set Default Gateway IP, Click Config--->Setting. See below the picture

Now we need to create DHCP pool on server. We create 4 DHCP pool on this network.

Enabling and Configuring DHCP Service ON the server, and create pool:



2nd Pool:

3rd pool:
4th pool:


Now We will Configure on Router:


CORE-ROUTER:

Router>enable

Router#

Router#configure terminal

Router(config)#

Router(config)#hostname core-router

core-router(config)#enable password cisco

core-router(config)#interface gig0/0

core-router(config-if)#ip address 172.7.4.137 255.255.255.252

core-router(config-if)#no shutdown

core-router(config-if)#exit

core-router(config)#

core-router(config)#interface serial0/2/0

core-router(config-if)#ip address 172.7.4.133 255.255.255.252

core-router(config-if)#no shutdown

core-router(config-if)#clock rate 64000

core-router(config-if)#exit

core-router(config)#

core-router(config)#interface serial0/2/1

core-router(config-if)#ip address 172.7.4.130 255.255.255.252

core-router(config-if)#no shutdown

core-router(config-if)#exit

 

core-router(config)#ip route 172.7.4.0 255.255.255.128 172.7.4.129

core-router(config)#ip route 172.7.3.0 255.255.255.0 172.7.4.129

core-router(config)#ip route 172.7.0.0 255.255.254.0 172.7.4.134

core-route(config)#ip route 172.7.2.0 255.255.255.0 172.7.4.134

core-router(config)#exit

core-router#copy startup-config running-config 

Router-1

Router>enable

Router#

Router#configure terminal

Router(config)#

Router(config)#hostname Router-1

Router-1(config)#enable password cisco

Router-1(config)#interface serial0/2/0

Router-1(config-if)#ip add 172.7.4.129 255.255.255.252

Router-1(config-if)#no shutdown

Router-1(config-if)#clock rate 64000

Router-1(config-if)#exit

Router-1(config)#

Router-1(config)#interface g0/0

Router-1(config-if)#ip address 172.7.4.1 255.255.255.128

Router-1(config-if)#no shutdown

Router-1(config-if)#exit

Router-1(config)#

Router-1(config)#interface gig0/1

Router-1(config-if)#ip address 172.7.3.1 255.255.255.0

Router-1(config-if)#no shutdown

Router-1(config-if)#exit

 

Router-1(config)#ip route 172.7.4.136 255.255.255.252 172.7.4.130

Router-1(config)#ip route 172.7.4.132 255.255.255.252 172.7.4.130

Router-1(config)#ip route 172.7.2.0 255.255.255.0 172.7.4.130

Router-1(config)#ip route 172.7.0.0 255.255.254.0 172.7.4.130

 

Router-1(config)#interface gig0/0

Router-1(config-if)#ip helper-address 172.7.4.138

Router-1(config-if)#exit

Router-1(config)#interface gig0/1

Router-1(config-if)#ip helper-address 172.7.4.138

Router-1(config-if)#exit

Router-1(config)#exit

Router-1#copy startup-config running-config 


Router-2

Router>enable


Router#


Router#configure terminal


Router(config)#


Router(config)#hostname Router-2


Router-2(config)#enable password cisco


Router-2(config)#interface serial0/2/1


Router-2(config-if)#ip address 172.7.4.134 255.255.255.252


Router-2(config-if)#no shutdown


Router-2(config-if)#exit


Router-2I(config)#


Router-2(config)#interface gig0/0


Router-2(config-if)#ip address 172.7.2.1 255.255.255.0


Router-2(config-if)#no shutdown


Router-2I(config-if)#exit


Router-2(config)#


Router-2(config)#interface gig0/1


Router-2(config-if)#


Router-2(config-if)#ip add 172.7.0.1 255.255.254.0


Router-2(config-if)#no shutdown

 

Router-2(config)#ip route 172.7.4.136 255.255.255.252 172.7.4.133

Router-2(config)#ip route 172.7.4.128 255.255.255.252 172.7.4.133

Router-2(config)#ip route 172.7.4.0 255.255.255.128 172.7.4.133

Router-2(config)#ip route 172.7.3.0 255.255.255.0 172.7.4.133


Router-2(config)#int gig0/0

Router-2(config-if)#ip helper-address 172.7.4.138

Router-2(config-if)#exit

Router-2(config)#interface gig0/1

Router-2(config-if)#

Router-2(config-if)#ip helper-address 172.7.4.138 

Router-2(config-if)#exit

Router-2(config)#exit

Router-2#copy startup-config running-config 

.....Configuration All OK.....😀

Now we can see the IP configuration option of The PC



Thank You ....😊


























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