This object indicates technique used by a service instance to
forward service frames.
'other'
If the forwarding behavior of a service instance is
not defined or unknown, this object is set to other(0).
'bridgeDomain'
Bridge domain is used to forward service frames by a
service instance. If cevcSIForwardingType is
'bridgeDomain(1)', there must exist an active
row in the cevcSIForwardBdTable with the same
index value of cevcSIIndex. The object
cevcSIForwardBdNumber indicates the identifier of
the bridge domain component being used.