I work with a Business WOW!/Astound connection on Coax. I see about 400-500kb/s ~800pps continuous of Broadcast ARP Traffic coming in the connection. That's not normal, is it? Basically, ARP Requests for every IP address on the Cable plant. Shouldn't the cable modem be filtering those, even if it is in bridge mode? The Mikrotik seems to be handling them fine, but I have a Grandstream PBX on a public IP Address, and I think that the volume may be causing it problems.

Is there a way in the mikrotik to filter any ARP that is not part of my /29 subnet?

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