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Bgp Routing Protocol

 

WHAT IS BGP

1. BGP IS A STANDERISED EXTERIOR GATEWAY PROTOCOL.

2.  DESIGNED TO EXCHANGE ROUTING AND REACHABILITY INFORMATION AMONG AUTONOMOUS SYSTEM (AS)  NUMBER ON THE INTERNET.

3. EACH BGP STORE INFORMATION ABOUT HOW TO REACH OTHER NETWORK.


FEATURES OF BGP

1. CONNECT MULTI AS NUMBER.

2. KNOWN AS MULTI DOMAIN ROUTING.

3. MOSTLY USED FOR ISP LEVEL NETWORK.

4. IT IS AN EXTERIOR ROUTING PROTOCOL.

5. INTER DOMAIN ROUTING PROTOCOL.

6. USED FOR INTERNET COMMUNICATION SYSTEM

7. NUMBER OF HOPES IS EQUAL AS NUMBER.

8. IT IS A PATH VECTOR ROUTING PROTOCOL.

9. SLOW ROUTING DECISIONS.

10. IT IS RUN OVER TCP .

11. BGP SUPPORTED SECURITY.

________________

BGP MESSAGE

OPEN MESSAGE

TCP COMMUNICAION WITH NEIGHBOUR ROUTER.

UPDATE MESSAGE

CONTAINS ROUTER UPDATE.

KEEPALIVE MESSAGE

CONTAIN NEIGHBOUR ALIVE HOST DETAILS.

UPDATE MESSAGE

ALL UPDATE BETWEEN NEIGHBOURS ROUTER OF HOST.

______________

CONFIGURATION BGP

STEP 1 

1. FIRST OF ALL YOU HAVE TO TAKE  TWO SWITCHES AND  ROUTER.

SWITCH AND ROUTER  CAN TAKE ANY MODEL OF  AND  AND ALSO YOU HAVE TO TAKE  AFTER THAT PC AND A LAPTOP.

2. AFTER THAT ASSIGN A IP ADDRESS IN ALL DEVICES.


STEP 2 

CONFIGURATION BGP IN TWO ROUTER R1 AND R2.

______________

STEP 1

CONFIGURATION IP ADDRESS IN ALL DEVICES.

GO TO R1 CONFIGURATION MODE AND ENTER COMMANDS

Router(config)# inter gig0/0

Router(config-if)# ip address 1.1.1.1 255.0.0.0

Router(config-if)# no shutdown

Router(config)#inter gig0/1

Router(config-if)#ip address 192.168.1.1 255.255.255.0

Router(config-if)#no shutdown


GP TO R2 CONFIGURATION MODE AND ENTER COMMANDS


Router(config)# inter gig0/0

Router(config-if)# ip address 1.1.1.2 255.0.0.0

Router(config-if)# no shutdown

Router(config)#inter gig0/1

Router(config-if)#ip address 192.165.1.1 255.255.0.0

Router(config-if)#no shutdown


AFTER THAT GO TO PC 1 "DESKTOP" AND CLICK "IP CONFIGURATION" AND ENTER IP ADDRESS SAME AS IT IS LAPTOP 1.


STEP 2

GO TO R1 CONFIGURATION  MODE AND ENTER COMMANDS.

Router(config)# ROUTER BGP 20

Router(config-router)# network 1.1.1.0

Router(config-router)# network 192.168.1.0


NETWORK MEANS THE IP ADDRESS THAT IS CONNECTED TO YOUR ROUTER'S INTERFACE, ADD A ZERO TO THAT ADDRESS BY ENDING LAST DIGIT TO CONVERT TO IT AND IT WILL BECOME YOUR NETWORK ADRESS.

AND R1 ATTACHED IP ADDRESS IS 1.1.1.1 AND 192.168.1.1


Router(config-router)# neighbor 172.168.1.1  remote-as 30

Router(config-router)# neighbor 1.1.1.2  remote-as 30


AND NEIGHBOR NETWORK MEANS THAT WHOEVER YOUR OTHER SIDE  IS CONNECTED TO THE SAME NETWORK, THAT IS, WHOEVER YOUR OTHER SIDE  IP ADDRESS IS CONNECTED WITH , THEIR ADDRESS HAS TO BE ENTERED AND ALONG WITH THEM THIS AUTONOMOUSE NUMBER(AS) SHOULD ALSO BE ADD.


____________


GO TO R2 CONFIGURATION MODE AND ENTER COMMANDS.


Router(config)# ROUTER BGP 30

Router(config-router)#  network 1.1.1.0

Router(config-router)#  network 172.165.0.0

Router(config-router)# neighbor 192.168.1.1  remote-as 20

Router(config-router)# neighbor 1.1.1.21 remote-as 20


___________


GO R1 ENABLE MODE 

Router# show ip bgp summary

GO TO R2 ENABLE MODE

Router# show ip bgp summary


CHECK THE CONNECTIVITY AND COMMUNICATION BETWEEN SCHOOL LAN AND UNVERSTY LAN. 

PING PC 1 TO LAPTOP 1

C:\> PING 172.165.1.10


YOU SAW THAT THERE IS COMMUNICATION BETWEEN THE SCHOOL LAN AND UNIVERSTY LAN.

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