Naveen Patel

Enhanced Interior Gateway Routing Protocol Cisco proprietary protocol Classless routing protocol Metric (32 bit) : Composite Metric (BW + Delay) by default. Administrative distance is 90 Updates are sent through Multicast IP address (224.0.0.10 ).

Naveen Patel

Enhanced Interior Gateway Routing Protocol

Max Hop count is 224 (100 by default) Supports IP, IPX and Apple Talk protocols Hello packets are sent every 5 seconds Convergence rate is fast

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Autonomous System
A unique number identifying the Routing domain of the routers. Ranges from 1- 65535 Public 1 64512 Private 64513 65535 An autonomous system is a collection of networks under a common administrative domain
Naveen Patel

Routing Protocol Classification IGP Interior Gateway Protocol Routing protocols used within an autonomous system All routers will be routing within the same Autonomous boundary RIP, IGRP, EIGRP, OSPF, IS-IS Naveen Patel EGP Exterior Gateway Protocol Routing protocol used between different autonomous systems Routers in different AS need an EGP Border Gateway Protocol is extensively

used as EGP

IGP & EGP

IGPs: RIP, OSPF, IGRP, EIGRP

EGPs: BGP

IGPs: RIP, OSPF, IGRP, EIGRP

XYZ - AS 100

ABC AS 200

IGPs operate within an autonomous system EGPs connect different autonomous systems

Naveen Patel

EIGRP Tables
Neighbor Table: Contains information about directly neighbors. Topology Table: Contains entries for all the destinations, along with feasible distance, any feasible successor, Advertised distance, and the calculated cost. Routing Table: Entries with the best path for each destination from the Topology Table are moved into Routing Table.

Naveen Patel

EIGRP Terminology
Feasible Distance: Feasible distance (FD) is the cost to a destination, including the local link cost. of the best route

Reported Distance: The cost of a route as advertised by the neighbor, so it does not include the local link cost If the advertised distance is less than the feasible distance, the route is tagged as a feasible successor. Successor: The neighbor with best cost to the destination. Feasible Successor: The neighbor with second best cost to the destination.

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EIGRP - Network Diagram

10.0.0.1/8 S0

11.0.0.1/8 S0

HYD

E0 192.168.1.1/24

S1 10.0.0.2/8

CHE

E0 192.168.2.1/24

S1 11.0.0.2/8

BAN
E0 192.168.3.1/24

LAN - 192.168.1.0/24

LAN 192.168.2.0/24

LAN - 192.168.3.0/24

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Disadvantages of EIGRP

Works only on Cisco Routers

Naveen Patel

Naveen Patel

Microsoft Windows 2000 [Version 5.00.2195] (C) Copyright 1985-2000 Microsoft Corp. C:\> telnet 192.168.1.1 Connecting ..... ================================ Welcome to Hyderabad Router ================================ User Access Verification password : **** Directly Connected Networks on Hyderabad> enable HYDERABAD Router password : **** Hyderabad# configure terminal 192.168.1.0 Enter configuration commands, one per line. End with CNTL/Z. 10.0.0.0 Hyderabad(config)# interface serial 0 Hyderabad(config-if)# ip address 10.0.0.1 255.0.0.0 Hyderabad(config-if)# no shut Hyderabad(config-if)# clockrate 64000 Hyderabad(config-if)# encapsulation hdlc Hyderabad(config-if)# exit Hyderabad(config)#

Naveen Patel

Hyderabad(config)# no ip routing Hyderabad(config)# ip routing Hyderabad(config)# router eigrp 10 Hyderabad(config-router)# network 192.168.1.0 Hyderabad(config-router)# network 10.0.0.0 Hyderabad(config-router)# Configuring EIGRP Router(config)# router eigrp <as no> Router(config-router)# network <Network ID>

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Hyderabad(config)# no ip routing Hyderabad(config)# ip routing Hyderabad(config)# router eigrp 10 Hyderabad(config-router)# network 192.168.1.0 Hyderabad(config-router)# network 10.0.0.0 Hyderabad(config-router)# ^Z Hyderabad# 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,*- candidate default U - per-user static route, o - ODR

Gateway of last resort is not set C 10.0.0.0/8 is directly connected, Serial0 D 11.0.0.0/8 [90/2681856] via 10.0.0.2, 00:00:49, Serial0 C 192.168.1.0/24 is directly connected, Ethernet0 D 192.168.2.0/24 [90/2195456] 10.0.0.2, 00:00:49, Serial0 Metric ofvia EIGRP 90 is nothing but D for EIGRP routes Administrative Distance D 192.168.3.0/24 [90/2707456] via 10.0.0.2, 00:00:25, Serial0 Composite Metric Hyderabad# Naveen Patel

Hyderabad# show ip eigrp topology IP-EIGRP Topology Table for process 10

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - Reply status

P 10.0.0.0/8, 1 successors, FD is 2169856 via Connected, Serial0 P 11.0.0.0/8, 1 successors, FD is 2681856 via 10.0.0.2 (2681856/2169856), Serial0 P 192.168.1.0/24, 1 successors, FD is 281600 via Connected, Ethernet0 P 192.168.2.0/24, 1 successors, FD is 2195456 via 10.0.0.2 (2195456/281600), Serial0 P 192.168.3.0/24, 1 successors, FD is 2707456 via 10.0.0.2 (2707456/2195456), Serial0 Hyderabad# show ip eigrp neighbors IP-EIGRP neighbors for process 10 H Address Interface Hold Uptime SRTT RTO Q Seq (sec) (ms) Cnt Num 0 10.0.0.2 Se0 13 00:07:24 42 252 0 8 Hyderabad# Naveen Patel

Microsoft Windows 2000 [Version 5.00.2195] (C) Copyright 1985-2000 Microsoft Corp. C:\> telnet 192.168.2.1 Connecting ..... ================================ Welcome to Chennai Router ================================ User Access Verification password : **** Chennai> enable Directly Connected Networks on CHENNAI Router password : **** Chennai# configure terminal 192.168.2.0 Enter configuration commands, one per line. End with CNTL/Z. 10.0.0.0 Chennai(config)# interface serial 1 11.0.0.0 Chennai(config-if)# ip address 10.0.0.2 255.0.0.0 Chennai(config-if)# no shut Chennai(config-if)# encapsulation hdlc Chennai(config-if)# interface serial 0 Chennai(config-if)# ip address 11.0.0.1 255.0.0.0 Chennai(config-if)# no shut Chennai(config-if)# encapsulation hdlc Naveen Patel

Chennai(config)# no ip routing Chennai(config)# ip routing Chennai(config)# router eigrp 10 Chennai(config-router)# network 192.168.2.0 Chennai(config-router)# network 10.0.0.0 Chennai(config-router)# network 11.0.0.0 Configuring EIGRP Chennai(config-router)# Router(config)# router eigrp <as no> Router(config-router)# network <Network ID>

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Chennai(config)# no ip routing Chennai(config)# ip routing Chennai(config)# router eigrp 10 Chennai(config-router)# network 192.168.2.0 Chennai(config-router)# network 10.0.0.0 Chennai(config-router)# network 11.0.0.0 ^ Chennai(config-router)# Z Chennai# 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,*- candidate default U - per-user static route, o - ODR

Gateway of last resort is not set

C 10.0.0.0/8 is directly connected, Serial1 C 11.0.0.0/8 is directly connected, Serial0 D 192.168.1.0/24 [90/2195456] via 10.0.0.1, 00:01:27, Serial1 C 192.168.2.0/24 is directly connected, Ethernet0 D 192.168.3.0/24 [90/2195456] viaof 11.0.0.2, 00:01:00, Serial0 IGRP 90 is Metric nothing but D for EIGRP routes Administrative Distance Chennai# Composite Metric Naveen Patel

Chennai# show ip eigrp topology IP-EIGRP Topology Table for process 10

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - Reply status

P 10.0.0.0/8, 1 successors, FD is 2169856 via Connected, Serial1 P 11.0.0.0/8, 1 successors, FD is 2169856 via Connected, Serial0 P 192.168.1.0/24, 1 successors, FD is 2195456 via 10.0.0.1 (2195456/281600), Serial1 P 192.168.2.0/24, 1 successors, FD is 281600 via Connected, Ethernet0 P 192.168.3.0/24, 1 successors, FD is 2195456 via 11.0.0.2 (2195456/281600), Serial0 Chennai# show ip eigrp neighbors IP-EIGRP neighbors for process 10 H Address Interface Hold Uptime SRTT RTO Q Seq (sec) (ms) Cnt Num 1 11.0.0.2 Se0 12 00:11:34 389 2334 0 4 0 10.0.0.1 Se1 13 00:12:02 27 200 0 5 Chennai# Naveen Patel

Microsoft Windows 2000 [Version 5.00.2195] (C) Copyright 1985-2000 Microsoft Corp. C:\> telnet 192.168.3.1 Connecting ..... ================================ Welcome to Banglore Router ================================ User Access Verification password : **** Banglore> enableDirectly Connected Networks on Banglore Router password : **** Banglore# configure terminal 192.168.3.0 Enter configuration commands, one per line. End with CNTL/Z. 11.0.0.0 Banglore(config)# interface serial 1 Banglore(config-if)# ip address 11.0.0.2 255.0.0.0 Banglore(config-if)# no shut Banglore(config-if)# clockrate 64000 Banglore(config-if)# encapsulation hdlc Banglore(config-if)# exit Banglore(config)#

Naveen Patel

Banglore(config)# no ip routing Banglore(config)# ip routing Banglore(config)# router eigrp 10 Banglore(config-router)# network 192.168.3.0 Banglore(config-router)# network 11.0.0.0 Banglore(config-router)# Configuring EIGRP Router(config)# router eigrp <as no> Router(config-router)# network <Network ID>

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Banglore(config)# no ip routing Banglore(config)# ip routing Banglore(config)# router eigrp 10 Banglore(config-router)# network 192.168.3.0 Banglore(config-router)# network 11.0.0.0 Banglore(config-router)# ^Z Banglore# 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,*- candidate default U - per-user static route, o - ODR

Gateway of last resort is not set D 10.0.0.0/8 [90/2681856] via 11.0.0.1, 00:01:32, Serial1 C 11.0.0.0/8 is directly connected, Serial1 D 192.168.1.0/24 [90/2707456] via 11.0.0.1, 00:01:32, Serial1 of IGRP 90 is Metric nothing but for EIGRP routes D D 192.168.2.0/24 [90/2195456] via 11.0.0.1, 00:01:32, Serial1 Administrative Distance Composite Metric C 192.168.3.0/24 is directly connected, Ethernet0 Banglore# Naveen Patel

Banglore# show ip eigrp topology IP-EIGRP Topology Table for process 10

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - Reply status

P 10.0.0.0/8, 1 successors, FD is 2681856 via 11.0.0.1 (2681856/2169856), Serial1 P 11.0.0.0/8, 1 successors, FD is 2169856 via Connected, Serial1 P 192.168.1.0/24, 1 successors, FD is 2707456 via 11.0.0.1 (2707456/2195456), Serial1 P 192.168.2.0/24, 1 successors, FD is 2195456 via 11.0.0.1 (2195456/281600), Serial1 P 192.168.3.0/24, 1 successors, FD is 281600 via Connected, Ethernet0 Banglore# show ip eigrp neighbors IP-EIGRP neighbors for process 10 H Address Interface Hold Uptime SRTT RTO Q Seq (sec) (ms) Cnt Num 0 11.0.0.1 Se1 14 00:14:15 36 216 0 7 Banglore# Naveen Patel

Hyderabad# ping 192.168.3.10 Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.3.10, timeout is 2 seconds:

!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms

Hyderabad# ping 192.168.2.10 Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.2.10, timeout is 2 seconds:

!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms

Hyderabad#

Naveen Patel

Chennai# ping 192.168.1.10 Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.1.10, timeout is 2 seconds:

!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms

Chennai# ping 192.168.3.10 Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.3.10, timeout is 2 seconds:

!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms

Chennai#

Naveen Patel

Banglore# ping 192.168.1.10 Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.1.10, timeout is 2 seconds:

!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms

Banglore# ping 192.168.2.10 Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.2.10, timeout is 2 seconds:

!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/43/44 ms

Banglore#

Naveen Patel