BGP - [Part 19] - PEER GROUP CONFIGURATION

Initially as per our topology, we will add some static routes.

Router1(config)#ip route 2.2.2.2 255.255.255.255 192.167.23.2

Router1(config)#ip route 3.3.3.3 255.255.255.255 192.167.24.3

Router2(config)#ip route 3.3.3.3 255.255.255.255 192.167.23.1

Router2(config)#ip route 1.1.1.1 255.255.255.255 192.167.23.1

Router2(config)#ip route 192.167.24.0 255.255.255.0 192.167.23.1

Router3(config)#ip route 1.1.1.1 255.255.255.255 192.167.24.1

Router3(config)#ip route 2.2.2.2 255.255.255.255 192.167.24.1

Router3(config)#ip route 192.167.23.0 255.255.255.0 192.167.24.1

Now we will set the MED

Router1(config)#route-map MED permit 10

Router1(config-route-map)#set metric 2000

Configuration Without BGP Peer Group

Router1(config)#router bgp 10

Router1(config-router)#neighbor 2.2.2.2 remote-as 20

Router1(config-router)#neighbor 3.3.3.3 remote-as 30

Router1(config-router)#neighbor 2.2.2.2 update-source loopback 1

Router1(config-router)#neighbor 3.3.3.3 update-source loopback 1

Router1(config-router)#neighbor 2.2.2.2 ebgp-multihop 2

Router1(config-router)#neighbor 3.3.3.3 ebgp-multihop 2

Router1(config-router)#neighbor 2.2.2.2 route-map MED out

Router1(config-router)#neighbor 3.3.3.3 route-map MED out

Configuration With BGP Peer Group

Initially, again we will start BGP configuration from starting 

Router1 Configuration - 

Router1(config)#router bgp 10

Router1(config-router)#neighbor 2.2.2.2 remote-as 20

Router1(config-router)#neighbor 3.3.3.3 remote-as 30

Now we will create BGP Peer Group

Router1(config)#router bgp 10

Router1(config-router)#neighbor R2-R3 peer-group

Now we will add neighbor in this group

Router1(config-router)#neighbor 2.2.2.2 peer-group R2-R3

Router1(config-router)#neighbor 3.3.3.3 peer-group R2-R3

Now which you want to configure, you can be applied to the peer group instead of applying it to the neighbor directly -

Router1(config-router)#neighbor R2-R3 update-source loopback 1

Router1(config-router)#neighbor R2-R3 ebgp-multihop 2

Router1(config-router)#neighbor R2-R3 route-map MED out

Router2 Configuration -

Router2(config)#route-map MED permit 10

Router2(config-route-map)#set metric 2000

Router2(config-route-map)#exit

Router2(config)#router bgp 20

Router2(config-router)#neighbor 1.1.1.1 remote-as 10

Router2(config-router)#neighbor 3.3.3.3 remote-as 30

Router2(config-router)#neighbor R1-R3 peer-group

Router2(config-router)#neighbor 1.1.1.1 peer-group R1-R3

Router2(config-router)#neighbor 3.3.3.3 peer-group R1-R3

Router2(config-router)#neighbor R1-R3 update-source loopback 1

Router2(config-router)#neighbor R1-R3 ebgp-multihop 2

Router2(config-router)#neighbor R1-R3 route-map MED out

Router2(config-router)#exit

Router3 Configuration -

Router3(config)#route-map MED permit 10

Router3(config-route-map)#set metric 2000

Router3(config-route-map)#exit

Router3(config)#router bgp 30

Router3(config-router)#neighbor 1.1.1.1 remote-as 10

Router3(config-router)#neighbor 2.2.2.2 remote-as 20

Router3(config-router)#neighbor R1-R2 peer-group

Router3(config-router)#neighbor 1.1.1.1 peer-group R1-R2

Router3(config-router)#neighbor 2.2.2.2 peer-group R1-R2

Router3(config-router)#neighbor R1-R2 update-source loopback 1

Router3(config-router)#neighbor R1-R2 ebgp-multihop 2

Router3(config-router)#neighbor R1-R2 route-map MED out

Router3(config-router)#exit

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Anubhav Upadhyay

Hello and welcome to networktopic Blog. My name is Anubhav. I am a Senior Network Egineer. I have created this blog specially to serve interview questions and answer on Network Routing and Switching, I will try my best to serve correct and updated networking knowledge for you as per my corporate experience.

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