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BGP Finite State Machine RFC is not correct when comparing to cisco

AbdoRefky
Level 1
Level 1

‎04-26-2017 12:02 AM

Nothing of what the RFC tell really happened.

 

what really happening is that the router will move from idle to active .. and if the three-way-handshake finished ... one of the two router will move from active to idle to connect !!! and you will see that on the debug from the passive open after the TCP hand shack on the right screen debug .

 

 

 

RFC 4271 - A Border Gateway Protocol 4 (BGP-4)

 

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Anton Abik
Level 4
Level 4

‎10-21-2018 08:50 AM

The FSM is not a RFC compliant. I tried to resolve this last year without success:

https://learningnetwork.cisco.com/message/636776#636776

 

And the best is that several books covering BGP doenst explain this correctly and just brings another confusion to the topic.

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