day07-2 dynamic routing ospf

8/13/2019 Day07-2 Dynamic Routing Ospf

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Open standard protocol

Successor of RIP

Classless routing protocol

Works with Link State Advertisements

Updates are Multicast

Works with Dijkstra algorithm, also called SPF

algorithm

Administrative distance is 110

Metric = Cost =108/Bandwidth in bps (CISCO)

Open Shortest Path First


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It maintains three tables :

Neighbor Table

Neighbor table contains information about the directly

connected ospf neighbors forming adjacency.

Database table

Database table contains information about the entire

view of the topology with respect to each router.

Routing information Table

Routing table contains information about the best path

calculated by the shortest path first algorithm in the

database table.

OSPF Tables


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Broadcast Multiaccess

Ethernet

Election of DR and BDR

Point to Point

Dedicated Serial Link

Non Broadcast Multiaccess

Frame Relay, X.25

OSPF Topologies


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OSPF - Network Diagram

E0192.168.1.150/24

HYD

LAN - 192.168.1.0/24

E0192.168.2.150/24

CHE

LAN - 192.168.2.0/24

E0192.168.3.15

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

AREA 0


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Consumes More Memory and CPU processing

Disadvantages of OSPF


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

telnet 192.168.1.150================================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 ospf 1Hyderabad(config-router)#Hyderabad(config-router)# network 192.168.1.0 0.0.0.255 area 0Hyderabad(config-router)# network 10.0.0.0 0.255.255.255 area 0

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

Configuring OSPF

Router(config)# router ospf

Router(config-router)# network area


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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, Serial0O 11.0.0.0/8 [110/128] via 10.0.0.2, 00:00:36, Serial0C 192.168.1.0/24 is directly connected, Ethernet0O 192.168.2.0/24 [110/74] via 10.0.0.2, 00:00:36, Serial0O 192.168.3.0/24 [110/138] via 10.0.0.2, 00:00:36, Serial0Hyderabad#

^Z

O for OSPF routes110 is nothing but

Administrative Distance

Metric of OSPF

Cost

Hyderabad(config)# router ospf 1Hyderabad(config-router)#Hyderabad(config-router)# network 192.168.1.0 0.0.0.255 area 0Hyderabad(config-router)# network 10.0.0.0 0.255.255.255 area 0

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


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show ip ospf databaseyderabad#OSPF Router with ID (192.168.1.150) (Process ID 1)

Router Link States (Area 0)Link ID ADV Router Age Seq# Checksum Link192.168.1.150 192.168.1.150 790 0x80000003 0x897B 3192.168.2.150 192.168.2.150 234 0x80000005 0x542 5192.168.3.150 192.168.3.150 232 0x80000003 0xD328 3Hyderabad# show ip ospf neighborNeighbor ID Pri State Dead Time Address192.168.2.150 1 FULL/ - 00:00:36 10.0.0.2Hyderabad#


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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 192.168.2.150

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 ospf 2Chennai(config-router)#Chennai(config-router)# network 192.168.2.0 0.0.0.255 area 0Chennai(config-router)# network 10.0.0.0 0.255.255.255 area 0

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

network 11.0.0.0 0.255.255.255 area 0Chennai(config-router)# Configuring OSPFRouter(config)# router ospf



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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, Serial0O 192.168.1.0/24 [110/74] via 10.0.0.1, 00:01:33, Serial1C 192.168.2.0/24 is directly connected, Ethernet0O 192.168.3.0/24 [110/74] via 11.0.0.2, 00:01:33, Serial0Chennai#

^Z



Metric of OSPF

Cost

Chennai(config)# router ospf 2

Chennai(config-router)#Chennai(config-router)# network 192.168.2.0 0.0.0.255 area 0Chennai(config-router)# network 10.0.0.0 0.255.255.255 area 0

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

network 11.0.0.0 0.255.255.255 area 0Chennai(config-router)#


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show ip ospf databasehennai#OSPF Router with ID (192.168.2.150) (Process ID 2)

Router Link States (Area 0)Link ID ADV Router Age Seq# Checksum Link192.168.1.150 192.168.1.150 1253 0x80000003 0x897B 3192.168.2.150 192.168.2.150 695 0x80000005 0x542 5192.168.3.150 192.168.3.150 693 0x80000003 0xD328 3Chennai# show ip ospf neighborNeighbor ID Pri State Dead Time Address192.168.3.150 1 FULL/ - 00:00:35 11.0.0.2192.168.1.150 1 FULL/ - 00:00:32 10.0.0.1Chennai#


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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 192.168.3.150

interface serial 1

Directly Connected Networks onBanglore Router

192.168.3.0

11.0.0.0


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Banglore(config)# router ospf 1Banglore(config-router)#Banglore(config-router)# network 192.168.3.0 0.0.0.255 area 0Banglore(config-router)#

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

network 11.0.0.0 0.255.255.255 area 0Configuring OSPF

Router(config)# router ospf



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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 setO 10.0.0.0/8 [110/128] via 11.0.0.1, 00:02:09, Serial1C 11.0.0.0/8 is directly connected, Serial1O 192.168.1.0/24 [110/138] via 11.0.0.1, 00:02:09, Serial1O 192.168.2.0/24 [110/74] via 11.0.0.1, 00:02:09, Serial1C 192.168.3.0/24 is directly connected, Ethernet0Banglore#

^Z



Metric of OSPF

Cost

Banglore(config)#router ospf 1Banglore(config-router)#Banglore(config-router)# network 192.168.3.0 0.0.0.255 area 0Banglore(config-router)#

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

network 11.0.0.0 0.255.255.255 area 0


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show ip ospf databaseanglore#OSPF Router with ID (192.168.3.150) (Process ID 1)

Router Link States (Area 0)Link ID ADV Router Age Seq# Checksum Link192.168.1.150 192.168.1.150 1506 0x80000003 0x897B 3192.168.2.150 192.168.2.150 948 0x80000005 0x542 5192.168.3.150 192.168.3.150 944 0x80000003 0xD328 3Banglore#show ip ospf neighborNeighbor ID Pri State Dead Time Address192.168.2.150 1 FULL/ - 00:00:37 11.0.0.10.1Banglore#


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ping 192.168.3.1yderabad#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#


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ping 192.168.1.1hennai#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# ping 192.168.3.1Type 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 msChennai#


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ping 192.168.1.1anglore#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#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 msBanglore#

day07-2 dynamic routing ospf

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