sdpBindPwPeerStatusBits indicates the bits set by the LDP
peer when there is a fault on its side of the pseudowire.
LAC failures occur on the SAP that has been configured on
the PIPE service, PSN bits are set by SDP-binding failures
on the PIPE service. The pwNotForwarding bit is set when
none of the above failures apply, such as an MTU mismatch
failure. This value is only applicable if the peer is
using the pseudowire status signalling method to indicate
faults.