EIGRP (Enhanced Interior Gateway Routing Protocol), is a Cisco Proprietary Hybrid Routing Protool. The configuration of EIGRP is similar to other Routing Protocols. In this example, we will configure EIGRP on Packet Tracer.
For our EIGRP example, we will use the below EIGRP topology on Packet Tracer.
Configure IP addresses of routers’ and PCs’ on Packet Tracer
PC0: 192.168.1.1 255.255.255.0 GW:192.168.1.2 PC1: 192.168.2.1 255.255.255.0 GW:192.168.2.2 PC2: 192.168.3.1 255.255.255.0 GW:192.168.3.2 PC3: 192.168.4.1 255.255.255.0 GW:192.168.4.2ROUTER CONFIGURATION
192.168.1.2 <ROUTER 0>
Router0> enable
Router0# config terminal
Router0(config)# interface FastEthernet0/0
Router0(config-if)# ip address 192.168.1.2 255.255.255.0
Router0(config-if)# no shutdown
Router0(config-if)# exit
Router0(config)# interface serial 0/0/0
Router0(config-if)# ip address 10.0.0.1 255.255.255.0
Router0(config-if)# no shutdown
Router0(config-if)# exit
Router0(config)# interface serial 0/0/1
Router0(config-if)# ip address 20.0.0.1 255.255.255.0
Router0(config-if)# no shutdown
Router0(config-if)# end
192.168.2.2 <ROUTER 1>
Router0> enable
Router0# config terminal
Router0(config)# interface FastEthernet0/0
Router0(config-if)# ip address 192.168.2.2 255.255.255.0
Router0(config-if)# no shutdown
Router0(config-if)# exit
Router0(config)# interface serial 0/0/0
Router0(config-if)# ip address 10.0.0.2 255.255.255.0
Router0(config-if)# no shutdown
Router0(config-if)# exit
Router0(config)# interface serial 0/0/1
Router0(config-if)# ip address 30.0.0.1 255.255.255.0
Router0(config-if)# no shutdown
Router0(config-if)# end
192.168.3.2 <ROUTER 2>
Router0> enable
Router0# config terminal
Router0(config)# interface FastEthernet0/0
Router0(config-if)# ip address 192.168.3.2 255.255.255.0
Router0(config-if)# no shutdown
Router0(config-if)# exit
Router0(config)# interface serial 0/0/0
Router0(config-if)# ip address 40.0.0.1 255.255.255.0
Router0(config-if)# no shutdown
Router0(config-if)# exit
Router0(config)# interface serial 0/0/1
Router0(config-if)# ip address 20.0.0.2 255.255.255.0
Router0(config-if)# no shutdown
Router0(config-if)# end
192.168.1.2 <ROUTER 3>
Router0> enable
Router0# config terminal
Router0(config)# interface FastEthernet0/0
Router0(config-if)# ip address 192.168.4.2 255.255.255.0
Router0(config-if)# no shutdown
Router0(config-if)# exit
Router0(config)# interface serial 0/0/0
Router0(config-if)# ip address 40.0.0.2 255.255.255.0
Router0(config-if)# no shutdown
Router0(config-if)# exit
Router0(config)# interface serial 0/0/1
Router0(config-if)# ip address 30.0.0.2 255.255.255.0
Router0(config-if)# no shutdown
Router0(config-if)# end
EIGRP CONFIGURATION
192.168.1.2 <ROUTER 0>
Router0(config)# router eigrp 1
Router0(config-router)# network 192.168.1.0
Router0(config-router)# network 10.0.0.0
Router0(config-router)# network 20.0.0.0
Router0(config-router)# no auto
Router0(config-router)# no auto-summary
Router0(config-router)# end
192.168.2.2 <ROUTER 1>
Router0(config)# router eigrp 1
Router0(config-router)# network 192.168.2.0
Router0(config-router)# network 10.0.0.0
Router0(config-router)# network 30.0.0.0
Router0(config-router)# no auto-summary
Router0(config-router)# no auto
Router0(config-router)# end
192.168.3.2 <ROUTER 2>
Router0(config)# router eigrp 1
Router0(config-router)# network 192.168.3.0
Router0(config-router)# network 40.0.0.0
Router0(config-router)# network 20.0.0.0
Router0(config-router)# no auto-summary
Router0(config-router)# no auto
Router0(config-router)# end
192.168.1.2 <ROUTER 3>
Router0(config)# router eigrp 1
Router0(config-router)# network 192.168.4.0
Router0(config-router)# network 40.0.0.0
Router0(config-router)# network 30.0.0.0
Router0(config-router)# no auto-summary
Router0(config-router)# no auto
Router0(config-router)# end
EIGRP Configuration Verification
When we use “show ip eigrp ?” command, we can see our eigrp options that we can use on Packet Tracer.
Router# show ip eigrp ? interfaces IP-EIGRP interfaces neighbors IP-EIGRP neighbors topology IP-EIGRP Topology Table traffic IP-EIGRP Traffic Statistics
We will see EIGRP neighbors with “show ip eigrp neighbors” command.
Router0# show ip eigrp neighbors
IP-EIGRP neighbors for process 100
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 10.0.0.2 Fa4/0 14 00:14:53 40 1000 0 12
1 20.0.0.2 Fa5/0 12 00:14:53 40 1000 0 11
We can verify the EIGRP interfaces with “show ip eigrp interfaces” command.
Router0# show ip eigrp interfaces
IP-EIGRP interfaces for process 100
Xmit Queue Mean Pacing Time Multicast Pending
Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes
Fa4/0 1 0/0 1236 0/10 0 0
Fa5/0 1 0/0 1236 0/10 0 0
Fa0/0 0 0/0 1236 0/10 0 0
We can see the whole Topology Table of Router0 and Router1.
outer0# show ip eigrp topology
IP-EIGRP Topology Table for AS 100/ID(192.168.1.2)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - Reply status
P 10.0.0.0/24, 1 successors, FD is 28160
via Connected, FastEthernet4/0
P 20.0.0.0/24, 1 successors, FD is 28160
via Connected, FastEthernet5/0
P 30.0.0.0/24, 1 successors, FD is 30720
via 10.0.0.2 (30720/28160), FastEthernet4/0
P 40.0.0.0/8, 1 successors, FD is 30720
via 20.0.0.2 (30720/28160), FastEthernet5/0
P 192.168.1.0/24, 1 successors, FD is 28160
via Connected, FastEthernet0/0
P 192.168.2.0/24, 1 successors, FD is 30720
via 10.0.0.2 (30720/28160), FastEthernet4/0
P 192.168.3.0/24, 1 successors, FD is 30720
via 20.0.0.2 (30720/28160), FastEthernet5/0
P 192.168.4.0/24, 1 successors, FD is 33280
via 10.0.0.2 (33280/30720), FastEthernet4/0
We can also see the EIGRP traffic statistics with “show ip eigrp traffic” command.
Router0# show ip eigrp traffic IP-EIGRP Traffic Statistics for process 100 Hellos sent/received: 965/644 Updates sent/received: 16/12 Queries sent/received: 0/0 Replies sent/received: 0/0 Acks sent/received: 5/7 Input queue high water mark 1, 0 drops SIA-Queries sent/received: 0/0 SIA-Replies sent/received: 0/0
We can check the routing table of Router0. We can see all routing table or we can see onle EIGRP routes.
Router0# 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
10.0.0.0/24 is subnetted, 1 subnets
C 10.0.0.0 is directly connected, FastEthernet4/0
20.0.0.0/24 is subnetted, 1 subnets
C 20.0.0.0 is directly connected, FastEthernet5/0
30.0.0.0/24 is subnetted, 1 subnets
D 30.0.0.0 [90/30720] via 10.0.0.2, 00:31:24, FastEthernet4/0
D 40.0.0.0/8 [90/30720] via 20.0.0.2, 00:31:24, FastEthernet5/0
C 192.168.1.0/24 is directly connected, FastEthernet0/0
D 192.168.2.0/24 [90/30720] via 10.0.0.2, 00:31:24, FastEthernet4/0
D 192.168.3.0/24 [90/30720] via 20.0.0.2, 00:31:24, FastEthernet5/0
D 192.168.4.0/24 [90/33280] via 10.0.0.2, 00:31:24, FastEthernet4/0
Router0# show ip route eigrp
30.0.0.0/24 is subnetted, 1 subnets
D 30.0.0.0 [90/30720] via 10.0.0.2, 00:31:20, FastEthernet4/0
D 40.0.0.0/8 [90/30720] via 20.0.0.2, 00:31:19, FastEthernet5/0
D 192.168.2.0/24 [90/30720] via 10.0.0.2, 00:31:20, FastEthernet4/0
D 192.168.3.0/24 [90/30720] via 20.0.0.2, 00:31:19, FastEthernet5/0
D 192.168.4.0/24 [90/33280] via 10.0.0.2, 00:31:19, FastEthernet4/0