BGP

[Aneek]

What is BGP Synchronisation rule. 

I have difficulty understanding it. Pls, explain. 

[balaji.bandi]

here is good reference with example :

https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/26634-bgp-toc.html#synch

[Aneek]

Thank you so much. 

[Vishnu Vardhan S]

The BGP synchronization rule states that if an AS provides transit service to another AS, BGP should not advertise a route until all of the routers within the AS have learned about the route via an IGP.