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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 ).

Enhanced Interior GatewayRouting Protocol

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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

Enhanced Interior GatewayRouting Protocol

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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

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Interior Gateway

Protocol

Routing protocols usedwithin an autonomous

system

All routers will be

routing within thesame Autonomous

boundary

RIP, IGRP, EIGRP,

OSPF, IS-IS

Exterior Gateway

Protocol

Routing protocol usedbetween different

autonomous systems

Routers in different AS

need an EGP

Border Gateway

Protocol is extensively

used as EGP

IGP EGP

Routing Protocol Classification

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XYZ - AS 100 ABC AS 200

IGPs operate within an autonomous system

EGPs connect different autonomous systems

EGPs: BGP

IGPs: RIP, OSPF,IGRP, EIGRP

IGPs: RIP, OSPF,IGRP, EIGRP

IGP & EGP

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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.

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EIGRP Terminology

Feasible Distance: Feasible distance (FD) is the cost of the best route

to a destination, including the local link cost.

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

LAN - 192.168.1.0/24 LAN 192.168.2.0/24

E0192.168.3.1/24

LAN - 192.168.3.0/24

E0192.168.1.1/24

E0192.168.2.1/24

10.0.0.1/8S0

S110.0.0.2/8

11.0.0.1/8S0

S111.0.0.2/8

HYD CHE BAN

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Works only on Cisco Routers

Disadvantages of EIGRP

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exityderabad(config-if)#Hyderabad(config)#

telnet 192.168.1.1================================Welcome to Hyderabad Router================================User Access Verificationpassword :****

****enableconfigure terminalinterface serial 0ip address 10.0.0.1 255.0.0.0

no shutclockrate 64000encapsulation hdlc

Hyderabad>password :Hyderabad#Enter configuration commands, one per line. End with CNTL/Z.Hyderabad(config)#Hyderabad(config-if)#Hyderabad(config-if)#Hyderabad(config-if)#Hyderabad(config-if)#

Microsoft Windows 2000 [Version 5.00.2195](C) Copyright 1985-2000 Microsoft Corp.C:\>Connecting .....

Directly Connected Networks onHYDERABAD Router

192.168.1.0

10.0.0.0

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Hyderabad(config)# router eigrp 10Hyderabad(config-router)#Hyderabad(config-router)# network 192.168.1.0Hyderabad(config-router)# network 10.0.0.0

no ip routingyderabad(config)#Hyderabad(config)# ip routing

Configuring EIGRP

Router(config)# router eigrp

Router(config-router)# network

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show ip routeyderabad#Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter areaN1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi- IS-IS, L1-IS-IS level-1, L2-IS-IS level-2,*- candidate defaultU - per-user static route, o - ODR

Gateway of last resort is not setC 10.0.0.0/8 is directly connected, Serial0D 11.0.0.0/8 [90/2681856] via 10.0.0.2, 00:00:49, Serial0C 192.168.1.0/24 is directly connected, Ethernet0D 192.168.2.0/24 [90/2195456] via 10.0.0.2, 00:00:49, Serial0D 192.168.3.0/24 [90/2707456] via 10.0.0.2, 00:00:25, Serial0Hyderabad#

^Z

Hyderabad(config)# router eigrp 10Hyderabad(config-router)#Hyderabad(config-router)# network 192.168.1.0Hyderabad(config-router)# network 10.0.0.0

no ip routingyderabad(config)#Hyderabad(config)# ip routing

D for EIGRP routes90 is nothing but

Administrative Distance

Metric of EIGRP

Composite Metric

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show ip eigrp topologyyderabad#IP-EIGRP Topology Table for process 10Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,

r - Reply statusP 10.0.0.0/8, 1 successors, FD is 2169856via Connected, Serial0P 11.0.0.0/8, 1 successors, FD is 2681856via 10.0.0.2 (2681856/2169856), Serial0P 192.168.1.0/24, 1 successors, FD is 281600via Connected, Ethernet0P 192.168.2.0/24, 1 successors, FD is 2195456via 10.0.0.2 (2195456/281600), Serial0P 192.168.3.0/24, 1 successors, FD is 2707456via 10.0.0.2 (2707456/2195456), Serial0Hyderabad# show ip eigrp neighborsIP-EIGRP neighbors for process 10H Address Interface Hold Uptime SRTT RTO Q Seq(sec) (ms) Cnt Num0 10.0.0.2 Se0 13 00:07:24 42 252 0 8Hyderabad#

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Chennai(config-if)#Chennai(config-if)#

================================Welcome to Chennai Router================================User Access Verificationpassword :****

****enableconfigure terminal

ip address 10.0.0.2 255.0.0.0no shutencapsulation hdlcinterface serial 0

Chennai>password :Chennai#Enter configuration commands, one per line. End with CNTL/Z.Chennai(config)#Chennai(config-if)#Chennai(config-if)#Chennai(config-if)#Chennai(config-if)#

Microsoft Windows 2000 [Version 5.00.2195](C) Copyright 1985-2000 Microsoft Corp.C:\>Connecting .....

Chennai(config-if)#

telnet 192.168.2.1

interface serial 1

ip address 11.0.0.1 255.0.0.0no shutencapsulation hdlc

Directly Connected Networks onCHENNAI Router

192.168.2.0

10.0.0.0

11.0.0.0

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Chennai(config)# router eigrp 10Chennai(config-router)#Chennai(config-router)# network 192.168.2.0Chennai(config-router)# network 10.0.0.0

no ip routinghennai(config)#Chennai(config)# ip routing

network 11.0.0.0Chennai(config-router)# Configuring EIGRPRouter(config)# router eigrp


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show ip routehennai#Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter areaN1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi- IS-IS, L1-IS-IS level-1, L2-IS-IS level-2,*- candidate defaultU - per-user static route, o - ODR

Gateway of last resort is not set

C 10.0.0.0/8 is directly connected, Serial1C 11.0.0.0/8 is directly connected, Serial0D 192.168.1.0/24 [90/2195456] via 10.0.0.1, 00:01:27, Serial1C 192.168.2.0/24 is directly connected, Ethernet0D 192.168.3.0/24 [90/2195456] via 11.0.0.2, 00:01:00, Serial0Chennai#

^Z

Chennai(config)# router eigrp 10

Chennai(config-router)#Chennai(config-router)# network 192.168.2.0Chennai(config-router)# network 10.0.0.0

no ip routinghennai(config)#Chennai(config)# ip routing

network 11.0.0.0Chennai(config-router)#



Metric of IGRP

Composite Metric

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show ip eigrp topologyhennai#IP-EIGRP Topology Table for process 10Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,r - Reply statusP 10.0.0.0/8, 1 successors, FD is 2169856via Connected, Serial1P 11.0.0.0/8, 1 successors, FD is 2169856via Connected, Serial0P 192.168.1.0/24, 1 successors, FD is 2195456

via 10.0.0.1 (2195456/281600), Serial1P 192.168.2.0/24, 1 successors, FD is 281600via Connected, Ethernet0P 192.168.3.0/24, 1 successors, FD is 2195456via 11.0.0.2 (2195456/281600), Serial0Chennai# show ip eigrp neighborsIP-EIGRP neighbors for process 10H Address Interface Hold Uptime SRTT RTO Q Seq(sec) (ms) Cnt Num1 11.0.0.2 Se0 12 00:11:34 389 2334 0 40 10.0.0.1 Se1 13 00:12:02 27 200 0 5Chennai#

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exitanglore(config-if)#Banglore(config)#

================================Welcome to Banglore Router================================User Access Verificationpassword :****

****enableconfigure terminal

ip address 11.0.0.2 255.0.0.0no shutclockrate 64000encapsulation hdlc

Banglore>password :Banglore#Enter configuration commands, one per line. End with CNTL/Z.Banglore(config)#Banglore(config-if)#Banglore(config-if)#Banglore(config-if)#Banglore(config-if)#

Microsoft Windows 2000 [Version 5.00.2195](C) Copyright 1985-2000 Microsoft Corp.C:\>Connecting .....telnet 192.168.3.1

interface serial 1

Directly Connected Networks onBanglore Router

192.168.3.0

11.0.0.0

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Banglore(config)# router eigrp 10Banglore(config-router)#Banglore(config-router)# network 192.168.3.0Banglore(config-router)# network 11.0.0.0

no ip routinganglore(config)#Banglore(config)# ip routing

Configuring EIGRP

Router(config)# router eigrp


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show ip routeanglore#Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter areaN1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi- IS-IS, L1-IS-IS level-1, L2-IS-IS level-2,*- candidate defaultU - per-user static route, o - ODR

Gateway of last resort is not setD 10.0.0.0/8 [90/2681856] via 11.0.0.1, 00:01:32, Serial1C 11.0.0.0/8 is directly connected, Serial1D 192.168.1.0/24 [90/2707456] via 11.0.0.1, 00:01:32, Serial1D 192.168.2.0/24 [90/2195456] via 11.0.0.1, 00:01:32, Serial1C 192.168.3.0/24 is directly connected, Ethernet0Banglore#

^Z

Banglore(config)# router eigrp 10

Banglore(config-router)#Banglore(config-router)# network 192.168.3.0Banglore(config-router)# network 11.0.0.0

no ip routinganglore(config)#Banglore(config)# ip routing



Metric of IGRP

Composite Metric

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show ip eigrp topologyanglore#IP-EIGRP Topology Table for process 10Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,

r - Reply statusP 10.0.0.0/8, 1 successors, FD is 2681856via 11.0.0.1 (2681856/2169856), Serial1P 11.0.0.0/8, 1 successors, FD is 2169856via Connected, Serial1P 192.168.1.0/24, 1 successors, FD is 2707456via 11.0.0.1 (2707456/2195456), Serial1P 192.168.2.0/24, 1 successors, FD is 2195456via 11.0.0.1 (2195456/281600), Serial1P 192.168.3.0/24, 1 successors, FD is 281600via Connected, Ethernet0Banglore#show ip eigrp neighborsIP-EIGRP neighbors for process 10H Address Interface Hold Uptime SRTT RTO Q Seq(sec) (ms) Cnt Num0 11.0.0.1 Se1 14 00:14:15 36 216 0 7Banglore#

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ping 192.168.3.10yderabad#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 msHyderabad#ping 192.168.2.10Type 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 msHyderabad#

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ping 192.168.1.10hennai#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 msChennai# ping 192.168.3.10Type 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 msChennai#

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ping 192.168.1.10anglore#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 msBanglore#ping 192.168.2.10Type 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 msBanglore#

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15 Eigrp