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Editor to share with you the example analysis of BGP loop backtracking interconnection, I believe that most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's go to know it!

Experiment name: BGP loop loop interconnection experiment

Purpose: proficient in using and configuring BGP, understanding the use of update-source, ebgp-multihop, next-hop-self

Experimental topology diagram:

The steps of the experiment:

Router R1 configuration:

Router > en

Router#conf t

Router (config) # int e0Universe 0

Router (config-if) # ip add 172.16.255.1 255.255.255.0

Router (config-if) # no shut

Router (config-if) # int loop 0

Router (config-if) # ip add 172.16.0.1 255.255.255.0

Router (config-if) # no shut

Router (config-if) # int loop 1

Router (config-if) # ip add 172.16.1.1 255.255.255.0

Router (config-if) # no shut

Router (config-if) # int loop 2

Router (config-if) # ip add 172.16.2.1 255.255.255.0

Router (config-if) # no shut

Router (config-if) # int loop 3

Router (config-if) # ip add 172.16.3.1 255.255.255.0

Router (config-if) # no shut

Router (config-if) # exit

Router (config) # router bgp 500

Router (config-router) # neighbor 172.16.16.1 remote-as 500

Router (config-router) # neighbor 172.16.16.1 update-source loop 0

Router (config-router) # net 172.16.255.0 mask 255.255.255.0

Router (config-router) # net 172.16.0.0 mask 255.255.255.0

Router (config-router) # net 172.16.1.0 mask 255.255.255.0

Router (config-router) # net 172.16.2.0 mask 255.255.255.0

Router (config-router) # net 172.16.3.0 mask 255.255.255.0

Router (config-router) # exit

Router (config) # router rip

Router (config-router) # version 2

Router (config-router) # net 172.16.0.0

Router (config-router) # no auto-summ

Router R2 configuration:

Router > en

Router#conf t

Router (config) # int e0Universe 0

Router (config-if) # ip add 172.16.255.2 255.255.255.0

Router (config-if) # no shut

Router (config-if) # int e0bin1

Router (config-if) # ip add 10.1.255.1 255.255.255.0

Router (config-if) # no shut

Router (config-if) # int loop 0

Router (config-if) # ip add 172.16.16.1 255.255.255.0

Router (config-if) # no shut

Router (config-if) # exit

Router (config) # router bgp 500

Router (config-router) # neighbor 172.16.0.1 remote-as 500

Router (config-router) # neighbor 172.16.0.1 update-source loop 0

Router (config-router) # neighbor 172.16.0.1 next-hop-self

Router (config-router) # neighbor 192.168.0.1 remote-as 600

Router (config-router) # neighbor 192.168.0.1 update-source loop 0

Router (config-router) # neighbor 192.168.0.1 ebgp-multihop 2

Router (config-router) # net 172.16.16.0 mask 255.255.255.0

Router (config-router) # net 172.16.255.0 mask 255.255.255.0

Router (config-router) # net 10.1.255.0 mask 255.255.255.0

Router (config-router) # exit

Router (config) # ip route 192.168.0.0 255.255.255.0 10.1.255.2

Router (config) # router rip

Router (config-router) # version 2

Router (config-router) # net 172.16.0.0

Router (config-router) # no auto-summ

Router R3 configuration:

Router > en

Router#conf t

Router (config) # int e0bin1

Router (config-if) # ip add 10.1.255.2 255.255.255.0

Router (config-if) # no shut

Router (config-if) # int loop 0

Router (config-if) # ip add 192.168.0.1 255.255.255.0

Router (config-if) # no shut

Router (config-if) # int loop 1

Router (config-if) # ip add 192.168.1.1 255.255.255.0

Router (config-if) # no shut

Router (config-if) # int loop 2

Router (config-if) # ip add 192.168.2.1 255.255.255.0

Router (config-if) # no shut

Router (config-if) # int loop 3

Router (config-if) # ip add 192.168.3.1 255.255.255.0

Router (config-if) # no shut

Router (config-if) # exit

Router (config) # router bgp 600

Router (config-router) # neighbor 172.16.16.1 remote-as 500

Router (config-router) # neighbor 172.16.16.1 update-source loop 0

Router (config-router) # neighbor 172.16.16.1 ebgp-multihop 2

Router (config-router) # aggregate-address 192.168.0.0 255.255.252.0 summary-only

Router (config-router) net 192.168.0.0 mask 255.255.255.0

Router (config-router) net 192.168.1.0 mask 255.255.255.0

Router (config-router) net 192.168.2.0 mask 255.255.255.0

Router (config-router) net 192.168.3.0 mask 255.255.255.0

Router (config-router) net 10.1.255.0 mask 255.255.255.0

Router (config-router) # exit

Router (config) # ip route 172.16.16.0 255.255.255.0 10.1.255.1

The above is all the contents of the article "sample Analysis of BGP Loop interconnection". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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