The value of this object identifies the node on which a BFD session is set up.
The values are as follows.
Options:
1. upe(1) -indicates that a BFD session is set up on a UPE to detect a PW
2. spe(2) -indicates that a BFD session is set up on an SPE to detect a PW
3. none(3) -indicates that a BFD session does not detect a PW
Default: none