Hello Premkumar
The slow-timer in BFD is used to control the rate at which BFD control packets are sent when the BFD session is up. The value of the slow-timer is the interval in milliseconds that BFD control packets are sent.
To verify the slow-timer, you can use the following command:
show bfd neighbors details
The values MinTxInt and MinRxInt correspond to the slow timer values that are set.
The slow-timer values used when the BFD session is up and working fine. If there are problems with the BFD session, the system switches to using the echo function to detect path failures. If the echo function is disabled, the system will use the slow-timer to detect path failures.
More information can be found at the following Cisco command reference:
I hope this has been helpful!
Laz