The value of sdpBindOperStatus indicates the operating status of
this Service-SDP binding.
'up' The Service-SDP binding is operational.
'noEgressLabel' The ingress label is available but the
egress one is missing.
'noIngressLabel' The egress label is available but the
ingress one is not.
'noLabels' Both the ingress and the egress labels
are missing.
'down' The binding is administratively down.
'svcMtuMismatch' Both labels are available, but a service
MTU mismatch was detected between the local
and the far-end devices.
'sdpPathMtuTooSmall' The operating path MTU of the corresponding
SDP minus the size of the SDP Bind control
word (if applicable) is smaller than the
service MTU.
'sdpNotReady' The SDP's signaling session is down.
'sdpDown' The SDP is not operationally up.
'sapDown' The SAP associated with the service is down.