Interior Gateway Routing Protocol (IGRP) can be configured in a router using the following IOS commands. If you have a new router with a latest IOS release, you may not find Interior Gateway Routing Protocol (IGRP) configuration commands because Interior Gateway Routing Protocol (IGRP) is removed from new IOS releases.
Router(config)# router igrp ASN
Router(config-router)# network Network_ID
Router(config-router)# network Network_ID
ASN in the above IOS command stands for Autonomous System Number.
The following diagram shows our lab setup. We have three routers, three switches and three hosts connected as below. The host names, IP addresses and the interfaces of the routers are shown in diagram. The IP addresses of the hosts are also shown in the diagram.
Hostname and IP address configuration in Router01
Connect to Router01 console and use the following IOS commands to configure host name as Router01.
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname Router01
Router01(config)#
Use the following IOS commands to open the fast ethernet interface Fa0/0 configuration mode on Router01 and configure IP address as 172.16.0.1/16.Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname Router01
Router01(config)#
Router01>enable
Router01#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router01(config)#interface fa0/0
Router01(config-if)#ip address 172.16.0.1 255.255.0.0
Router01(config-if)#no shutdown
Use the following IOS commands to open the serial interface S0/0 configuration mode on Router01 and configure IP address as 172.17.0.1/16. You have to set a clock rate also using the "clock rate" command on S0/0 interface, since this is the DCE side.Router01#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router01(config)#interface fa0/0
Router01(config-if)#ip address 172.16.0.1 255.255.0.0
Router01(config-if)#no shutdown
Router01>enable
Router01#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router01(config)#interface s0/0
Router01(config-if)#clock rate 64000
Router01(config-if)#ip address 172.17.0.1 255.255.0.0
Router01(config-if)#no shutdown
Do remember to run the "copy running-config startup-config" command from enable mode, if you want to save the changes you have made in the router.Router01#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router01(config)#interface s0/0
Router01(config-if)#clock rate 64000
Router01(config-if)#ip address 172.17.0.1 255.255.0.0
Router01(config-if)#no shutdown
Hostname and IP address configuration in Router02
Connect to Router02 console and use the following IOS commands to configure host name as Router02.
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname Router02
Router02(config)#
Use the following IOS commands to open the fast ethernet interface Fa0/0 configuration mode on Router02 and configure IP address as 172.18.0.1/16.Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname Router02
Router02(config)#
Router02>enable
Router02#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router02(config)#interface fa0/0
Router02(config-if)#ip address 172.18.0.1 255.255.0.0
Router02(config-if)#no shutdown
Use the following IOS commands to open the serial interface S0/0 configuration mode on Router02 and configure IP address as 172.17.0.2/16. Router02#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router02(config)#interface fa0/0
Router02(config-if)#ip address 172.18.0.1 255.255.0.0
Router02(config-if)#no shutdown
Router02>enable
Router02#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router02(config)#interface s0/0
Router02(config-if)#ip address 172.17.0.2 255.255.0.0
Router02(config-if)#no shutdown
Use the following IOS commands to open the serial interface S0/1 configuration mode on Router02 and configure IP address as 172.19.0.1/16. You have to set a clock rate also using the "clock rate" command on S0/1 interface, since this is the DCE side.Router02#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router02(config)#interface s0/0
Router02(config-if)#ip address 172.17.0.2 255.255.0.0
Router02(config-if)#no shutdown
Router02>enable
Router02#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router02(config)#interface s0/1
Router02(config-if)#clock rate 64000
Router02(config-if)#ip address 172.19.0.1 255.255.0.0
Router02(config-if)#no shutdown
Do remember to run the "copy running-config startup-config" command from enable mode, if you want to save the changes you have made in the router.Router02#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router02(config)#interface s0/1
Router02(config-if)#clock rate 64000
Router02(config-if)#ip address 172.19.0.1 255.255.0.0
Router02(config-if)#no shutdown
Hostname and IP address configuration in Router03
Connect to Router03 console and use the following IOS commands to configure host name as Router03.
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname Router03
Router03(config)#
Use the following IOS commands to open the fast ethernet interface Fa0/0 configuration mode on Router03 and configure IP address as 172.20.0.1/16.Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname Router03
Router03(config)#
Router03>enable
Router03#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router03(config)#interface fa0/0
Router03(config-if)#ip address 172.20.0.1 255.255.0.0
Router03(config-if)#no shutdown
Use the following IOS commands to open the serial interface S0/1 configuration mode on Router03 and configure IP address as 172.19.0.2/16. Router03#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router03(config)#interface fa0/0
Router03(config-if)#ip address 172.20.0.1 255.255.0.0
Router03(config-if)#no shutdown
Router03>enable
Router03#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router03(config)#interface s0/1
Router03(config-if)#ip address 172.19.0.2 255.255.0.0
Router03(config-if)#no shutdown
Do remember to run the "copy running-config startup-config" command from enable mode, if you want to save the changes you have made in the router.Router03#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router03(config)#interface s0/1
Router03(config-if)#ip address 172.19.0.2 255.255.0.0
Router03(config-if)#no shutdown
Interior Gateway Routing Protocol (IGRP) configuration in Router01
Connect to Router01 console and use the following IOS commands to configure Interior Gateway Routing Protocol (IGRP) in Router01. Please refer the beginning of this lesson to view the Interior Gateway Routing Protocol (IGRP) configuration IOS command.
In the IOS "network" command, shown below, we specify only the directly connected networks of this router.
Router01>enable
Router01#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router01(config)# router igrp 1
Router01(config-router)# network 172.16.0.0
Router01(config-router)# network 172.17.0.0
Router01(config-router)#exit
Router01(config)#exit
Router01#
Do remember to run the "copy running-config startup-config" command from enable mode, if you want to save the changes you have made in the router. Router01#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router01(config)# router igrp 1
Router01(config-router)# network 172.16.0.0
Router01(config-router)# network 172.17.0.0
Router01(config-router)#exit
Router01(config)#exit
Router01#
Interior Gateway Routing Protocol (IGRP) configuration in Router02
Connect to Router02 console and use the following IOS commands to configure Interior Gateway Routing Protocol (IGRP) in Router02. Please refer the beginning of this lesson to view the Interior Gateway Routing Protocol (IGRP) configuration IOS command.
In the IOS "network" command, shown below, we specify only the directly connected networks of this router.
Router02>enable
Router02#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router02(config)# router igrp 1
Router02(config-router)# network 172.17.0.0
Router02(config-router)# network 172.18.0.0
Router02(config-router)# network 172.19.0.0
Router02(config-router)#exit
Router02(config)#exit
Router02#
Do remember to run the "copy running-config startup-config" command from enable mode, if you want to save the changes you have made in the router. Router02#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router02(config)# router igrp 1
Router02(config-router)# network 172.17.0.0
Router02(config-router)# network 172.18.0.0
Router02(config-router)# network 172.19.0.0
Router02(config-router)#exit
Router02(config)#exit
Router02#
Interior Gateway Routing Protocol (IGRP) configuration in Router03
Connect to Router03 console and use the following IOS commands to configure Interior Gateway Routing Protocol (IGRP) in Router03. Please refer the beginning of this lesson to view the Interior Gateway Routing Protocol (IGRP) configuration IOS command.
In the IOS "network" command, shown below, we specify only the directly connected networks of this router.
Router03>enable
Router03#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router03(config)# router igrp 1
Router03(config-router)# network 172.19.0.0
Router03(config-router)# network 172.20.0.0
Router03(config-router)#exit
Router03(config)#exit
Router03#
Do remember to run the "copy running-config startup-config" command from enable mode, if you want to save the changes you have made in the router. Router03#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router03(config)# router igrp 1
Router03(config-router)# network 172.19.0.0
Router03(config-router)# network 172.20.0.0
Router03(config-router)#exit
Router03(config)#exit
Router03#
How to view the routing table in Router01
After the network is converged after the initial configuration and Interior Gateway Routing Protocol (IGRP) configuration, we can use the "show ip route" to view the routing table in Router01, as shown below.
Router01>enable
Router01#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Router01#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
C 172.16.0.0/16 is directly connected, FastEthernet0/0
C 172.17.0.0/16 is directly connected, Serial0/0
I 172.18.0.0/16 [120/1] via 172.17.0.2, 00:00:22, Serial0/0
I 172.19.0.0/16 [120/1] via 172.17.0.2, 00:00:22, Serial0/0
I 172.20.0.0/16 [120/2] via 172.17.0.2, 00:00:22, Serial0/0
C 172.17.0.0/16 is directly connected, Serial0/0
I 172.18.0.0/16 [120/1] via 172.17.0.2, 00:00:22, Serial0/0
I 172.19.0.0/16 [120/1] via 172.17.0.2, 00:00:22, Serial0/0
I 172.20.0.0/16 [120/2] via 172.17.0.2, 00:00:22, Serial0/0
The "I" character at the beginning of a line in routing table shows that it is a route discovered byInterior Gateway Routing Protocol (IGRP) and "C" character shows that it is a directly connected network.
How to view the routing table in Router02
When the network is converged after the initial configuration and Interior Gateway Routing Protocol (IGRP) configuration, we can use the "show ip route" to view the routing table in Router02, as shown below.
Router02>enable
Router02#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Router02#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
I 172.16.0.0/16 [120/1] via 172.17.0.1, 00:00:07, Serial0/0
C 172.17.0.0/16 is directly connected, Serial0/0
C 172.18.0.0/16 is directly connected, FastEthernet0/0
C 172.19.0.0/16 is directly connected, Serial0/1
I 172.20.0.0/16 [120/1] via 172.19.0.2, 00:00:20, Serial0/1
The "I" character at the beginning of a line in routing table shows that it is a route discovered by Interior Gateway Routing Protocol (IGRP) and "C" character shows that it is a directly connected network.C 172.17.0.0/16 is directly connected, Serial0/0
C 172.18.0.0/16 is directly connected, FastEthernet0/0
C 172.19.0.0/16 is directly connected, Serial0/1
I 172.20.0.0/16 [120/1] via 172.19.0.2, 00:00:20, Serial0/1
How to view the routing table in Router03
When the network is converged after the initial configuration and Interior Gateway Routing Protocol (IGRP) configuration, we can use the "show ip route" to view the routing table in Router03, as shown below.
Router03>enable
Router03#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Router03#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
I 172.16.0.0/16 [120/2] via 172.19.0.1, 00:00:02, Serial0/1
I 172.17.0.0/16 [120/1] via 172.19.0.1, 00:00:02, Serial0/1
I 172.18.0.0/16 [120/1] via 172.19.0.1, 00:00:02, Serial0/1
C 172.19.0.0/16 is directly connected, Serial0/1
C 172.20.0.0/16 is directly connected, FastEthernet0/0
I 172.17.0.0/16 [120/1] via 172.19.0.1, 00:00:02, Serial0/1
I 172.18.0.0/16 [120/1] via 172.19.0.1, 00:00:02, Serial0/1
C 172.19.0.0/16 is directly connected, Serial0/1
C 172.20.0.0/16 is directly connected, FastEthernet0/0
The "I" character at the beginning of a line in routing table shows that it is a route discovered by Interior Gateway Routing Protocol (IGRP) and "C" character shows that it is a directly connected network.
Verify the connectivity between networks using the ping command
To verify the Interior Gateway Routing Protocol (IGRP) routes and the connectivity between networks, run the ping command from Host01 (IP address: 172.16.0.10/16) to Host03 (IP address: 172.20.0.10/16).
C:\>ping 172.20.0.10
Pinging 172.20.0.10 with 32 bytes of data:
Reply from 172.20.0.10: bytes=32 time=172ms TTL=125
Reply from 172.20.0.10: bytes=32 time=188ms TTL=125
Reply from 172.20.0.10: bytes=32 time=157ms TTL=125
Reply from 172.20.0.10: bytes=32 time=188ms TTL=125
Reply from 172.20.0.10: bytes=32 time=188ms TTL=125
Reply from 172.20.0.10: bytes=32 time=157ms TTL=125
Reply from 172.20.0.10: bytes=32 time=188ms TTL=125
Ping statistics for 172.20.0.10:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 157ms, Maximum = 188ms, Average = 176ms
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 157ms, Maximum = 188ms, Average = 176ms
The ping reply from Host03 (IP address: 172.20.0.10/16) shows that the Interior Gateway Routing Protocol (IGRP) is configured well in three routers and there is network connectivity between different networks.
0 comments:
Post a Comment