The value of tmnxPimSnpgGenTrackingSupport indicates the router's
capability to disable Join message suppression.
The value of tmnxPimSnpgGenTrackingSupport is 'true' if all CE routers
advertise tracking support in the PIM Hellos they send. If one or
more CE routers does not advertise tracking support in the PIM
Hellos they send, then the value of tmnxPimSnpgGenTrackingSupport
is set to 'false'. If the value of tmnxPimSnpgGenTrackingSupport is
'true', then it implies Join Suppression is disabled in the VPLS;
and vice-versa. This is used to determine the operational state of
tmnxPimSnpgGenOperState. If the value of tmnxPimSnpgGenTrackingSupport
is 'true', then the value of tmnxPimSnpgGenOperState is 'snoop',
otherwise it is 'proxy'.