ZyXEL Communications Dimension ES-3124 Support Notes page 119

ES-3100 Series Switch Support Notes
Try to generate some broadcast traffic from the probe or your network
device, then you should see the BroadcastPkts increasing.
5. In conclusion, if the Switch
supports RMON, then you can
get the values from the Switch
in the RMON Group(s),
otherwise, it will return 0 and
always stays 0. Without the
supporting of RMON, then it is
impossible to monitor those
elements in the RMON MIB
Group
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