BFD is flapping between Qfx10002 and F5 devices
The BFD is flapping between qfx10002 and F5 device
From the var log we noticed the below log messages
%DAEMON-4-BFDD_STATE_UP_TO_DOWN: BFD Session X.X.X.X (IFL XXX) state Up -> Down LD/RD(48/2723) Up time:4d 03:23 Local diag: CtlExpire Remote diag: None Reason: Detect Timer Expiry.
For large-scale network deployments with a large number of BFD sessions, specify a minimum interval of no less than 500 ms. An interval of 1000 ms is recommended to avoid any instability issues.
https://www.juniper.net/documentation/us/en/software/junos/high-availability/topics/topic-map/bfd.html#:~:text=An%20interval%20of%201000%20ms,for%20Routing%20Engine%2Dbased%20sessions.
We need to change the BFD timer as 1000ms and check the BFD status, if the issue remains the same after change the timer, we need to check the BFD traces.