Hi,
use this path to download files:
ftp://ftp.cisco.com/pub/mibs/viptela-mibs/
VIPTELA-BFD.mib is used for BFD monitoring. Below detailed info and link:
BFD(VIPTELA-BFD.mib)Operational data related to the Bidirectional Forwarding Protocol (BFD). The values returned are similar to those in the show bfd history, show bfd sessions, and show bfd summaryCLI commands, and the BFD History, BFD Sessions, and BFD Summary options in the vManage Monitor ►Network ►Real Time screen.
https://cisco.com/c/dam/en/us/td/docs/routers/sdwan/configuration/config-18-2.pdf
page 31
Regards,
HTH,
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