dynamic routing igrp

2

• Cisco proprietary protocol

• Classful routing protocol

• Updates are broadcasted via 255.255.255.255

• Administrative distance is 100

• Metric (24 bit) : Composite Metric

(BW+Delay+Load+MTU+Reliability)

• Max Hop count is 255 (100 is default)

• Load balancing of 6 equal or unequal paths

• Used for large organizations

Interior Gateway Routing Protocol

3

• Update timer : 90 sec

• Invalid timer : 270 sec

• Flush timer : 630 sec

• Holddown timer : 280 sec

IGRP Timers

4

• 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

Autonomous System Number

5

• 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

• 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

Routing Protocol Classification

6

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

7

IGRP - Network Diagram

E0 192.168.1.150/24

HYD

LAN - 192.168.1.0/24

E0 192.168.2.150/24

CHE

LAN - 192.168.2.0/24

E0 192.168.3.150/24

BAN

LAN - 192.168.3.0/24

10.0.0.1/8S0

S110.0.0.2/8

11.0.0.1/8S0

S111.0.0.2/8

8

• Only works on Cisco Routers

• Slow convergence

• Formation of Routing loops

Disadvantages of IGRP

10

exitHyderabad(config-if)#Hyderabad(config)#

telnet 192.168.1.150

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

****enable

configure terminal

interface serial 0ip address 10.0.0.1 255.0.0.0no 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 on HYDERABAD Router

192.168.1.010.0.0.0

Directly Connected Networks on HYDERABAD Router

192.168.1.010.0.0.0

11

Hyderabad(config)#router igrp 5

Hyderabad(config-router)#

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

no ip routingHyderabad(config)#

Hyderabad(config)#ip routing

Configuring IGRPRouter(config)# router igrp <as no>Router(config-router)# network <Network ID>


12

show ip routeHyderabad#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, Serial0I 11.0.0.0/8 [100/10476] via 10.0.0.2, 00:00:18, Serial0C 192.168.1.0/24 is directly connected, Ethernet0I 192.168.2.0/24 [100/8576] via 10.0.0.2, 00:00:18, Serial0I 192.168.3.0/24 [100/10576] via 10.0.0.2, 00:00:18, Serial0Hyderabad#

^Z

Hyderabad(config)#router igrp 5

Hyderabad(config-router)#

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

no ip routingHyderabad(config)#

Hyderabad(config)#ip routing

I – for IGRP routes I – for IGRP routes 100 is nothing but Administrative Distance

100 is nothing but Administrative Distance

Metric of IGRP Composite Metric


13

show ip protocolsHyderabad#Routing Protocol is "igrp 5" Sending updates every 90 seconds, next due in 49 seconds Invalid after 270 seconds, hold down 280, flushed after 630 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Default networks flagged in outgoing updates Default networks accepted from incoming updates IGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0 IGRP maximum hopcount 100 IGRP maximum metric variance 1 Redistributing: igrp 5 Routing for Networks: 192.168.1.0 10.0.0.0 Routing Information Sources: Gateway Distance Last Update 10.0.0.2 100 00:01:10 Distance: (default is 100)Hyderabad#

14

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

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

****enable

configure 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)#


Chennai(config-if)#

telnet 192.168.2.150

interface serial 1

ip address 11.0.0.1 255.0.0.0no shutencapsulation hdlc

Directly Connected Networks on CHENNAI Router192.168.2.0

10.0.0.011.0.0.0

Directly Connected Networks on CHENNAI Router192.168.2.0

10.0.0.011.0.0.0

15

Chennai(config)#router igrp 5

Chennai(config-router)#

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

no ip routingChennai(config)#

Chennai(config)#ip routing

network 11.0.0.0Chennai(config-router)# Configuring IGRP

Router(config)# router igrp <as no>Router(config-router)# network <Network ID>


16

show ip routeChennai#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


C 10.0.0.0/8 is directly connected, Serial1C 11.0.0.0/8 is directly connected, Serial0I 192.168.1.0/24 [100/8576] via 10.0.0.1, 00:00:28, Serial1C 192.168.2.0/24 is directly connected, Ethernet0I 192.168.3.0/24 [100/8576] via 11.0.0.2, 00:00:54, Serial0Chennai#

^Z

Chennai(config)#router igrp 5

Chennai(config-router)#

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

no ip routingChennai(config)#

Chennai(config)#ip routing

network 11.0.0.0Chennai(config-router)#





17

show ip protocolsChennai#Routing Protocol is "igrp 5" Sending updates every 90 seconds, next due in 56 seconds Invalid after 270 seconds, hold down 280, flushed after 630 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Default networks flagged in outgoing updates Default networks accepted from incoming updates IGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0 IGRP maximum hopcount 100 IGRP maximum metric variance 1 Redistributing: igrp 5 Routing for Networks: 10.0.0.0 11.0.0.0 192.168.2.0 Routing Information Sources: Gateway Distance Last Update 11.0.0.2 100 00:00:22 10.0.0.1 100 00:00:59 Distance: (default is 100)Chennai#

18

exitBanglore(config-if)#Banglore(config)#

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

****enable

configure 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)#


telnet 192.168.3.150

interface serial 1

Directly Connected Networks on Banglore Router192.168.3.0

11.0.0.0

Directly Connected Networks on Banglore Router192.168.3.0

11.0.0.0

19

Banglore(config)#router igrp 5

Banglore(config-router)#

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

no ip routingBanglore(config)#

Banglore(config)#ip routing



20

show ip routeBanglore#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


I 10.0.0.0/8 [100/10476] via 11.0.0.1, 00:00:01, Serial1C 11.0.0.0/8 is directly connected, Serial1I 192.168.1.0/24 [100/10576] via 11.0.0.1, 00:00:01, Serial1I 192.168.2.0/24 [100/8576] via 11.0.0.1, 00:00:01, Serial1C 192.168.3.0/24 is directly connected, Ethernet0Banglore#

^Z

Banglore(config)#router igrp 5

Banglore(config-router)#

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

no ip routingBanglore(config)#

Banglore(config)#ip routing





21

show ip protocolsBanglore# Sending updates every 90 seconds, next due in 11 seconds Invalid after 270 seconds, hold down 280, flushed after 630 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Default networks flagged in outgoing updates Default networks accepted from incoming updates IGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0 IGRP maximum hopcount 100 IGRP maximum metric variance 1 Redistributing: igrp 5 Routing for Networks: 192.168.3.0 11.0.0.0 Routing Information Sources: Gateway Distance Last Update 11.0.0.1 100 00:01:02 Distance: (default is 100)Banglore#

22

ping 192.168.3.1Hyderabad#Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 192.168.3.1, timeout is 2 seconds:

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

!!!!!

ping 192.168.2.1Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds:

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

!!!!!

23

ping 192.168.1.1Chennai#Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:

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

!!!!!


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

!!!!!

24

ping 192.168.1.1Banglore#Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:

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

!!!!!


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

!!!!!

dynamic routing igrp

Technology

ip routing hyderabadconfig

hyderabad router hyderabad

isnothing igrp

disadvantages of igrp

shut hyderabadconfig

hyderabad router password

exit hyderabadconfig

igrp network diagram10