BFD down due to that BGP session flapping

[R Manjunatha]

Hi 

We have a connection from on-premises to Azure via the ExpressRoute virtual router, with BFD enabled. The BFD interval is set to 1000ms on the on-premises side and 300ms on the Azure side. However, the BGP session is frequently resetting due to BFD being down. Can anyone suggest a solution to stabilize this link?

regards,

[balaji.bandi]

what is the Logs show on the Device, what device on-premisses (router and IOS running)

check some troubleshooting tips :

https://www.cisco.com/c/en/us/support/docs/ip/ip-routing/220364-troubleshoot-bidirectional-forwarding-de.html

Try disabling the BFD and see is the BGP stable ? (for troubleshooting)

[Torbjørn]

What is the min_rx and max age set to on either end? 

[R Manjunatha]

as per the BFD template min-tx 1000 and min-rx 1000 multipliers 3 

R1-bfd 1000ms------to-----Azure --- bfd 300ms

[R Manjunatha]

could you please confirm if high bandwidth utilization due to the BFD session will go down very often 

[MHM Cisco World]

Why you use mismatch interval in each side?

MHM

[MHM Cisco World]

any update ?

MHM