This is the DTIM period for this MBSSID enabled SSID.
It is the number of beacon intervals that shall elapse
between transmission of Beacons frames containing a
TIM element whose DTIM Count field is 0.
This DTIM period is only applicable if MBSSID is
enabled at the interface which this SSID is attached,
i.e. cd11IfMultipleBssidEnable is 'true'.
The default value is 0 which indicates dot11DTIMPeriod
of IEEE802dot11-MIB is used. The current valid DTIM
period range for the radio is 1 to 100.