This object identifies the LPD Group status.
When the LPD Group status changes and
rttMplsVpnMonReactLpdNotifyType is set to 'lpdGroupStatus' or
'lpdAll' a rttMonLpdGrpStatusNotification will be generated.
When the LPD Group status value is 'unknown' or changes to
'unknown' this notification will not be generated.
When LSP Path Discovery is enabled for a particular row in
rttMplsVpnMonCtrlTable, 'single probes' in the 'lspGroup' probe
cannot generate notifications independently but will be
generating depending on the state of the group. Notifications
are only generated if the failure/restoration of an individual
probe causes the state of the LPD Group to change.
This object will be set to 'unknown' on reset.