The value of tmnxPimSnpgGenHoldTime specifies the duration that
allows the PIM-snooping switch to snoop all the PIM states in the
VPLS.
During this duration, multicast traffic is flooded in the VPLS.
At the end of this duration, multicast traffic is forwarded using
the snooped states.
PIM snooping is enabled when value of tmnxPimSnpgGenAdminState
is 'inService'. When PIM snooping is enabled in VPLS, there is a
period of time when the PIM snooping switch may not have built
complete snooping state. The switch cannot build states until the
routers connected to the VPLS refresh their PIM messages.
The value of tmnxPimSnpgGenHoldTime is in effect only if PIM snooping
is enabled.