said by kash1:Looking everywhere for a setting to keep these out of our internal network!
There is not a customer accessible setting in the SMCD3G that will do that. There may be a telnet CLI command that will do it, but finding a Comcast CSR who knows how (or is willing to do it) is a futile exercise.
If you don't have your own firewall/router between the SMCD3G's LAN and your network, the ARP broadcasts are going to be there.
Call Comcast business class support and get a trouble ticket (and/or post in this site's »
Comcast Direct forum). If enough customers do that, perhaps someone might eventually escalate it to Comcast engineering for a fix. I have done this for both the ARP traffic problem and the now non-functioning firewall rules setup for True Static IP (I suspect that there is a relationship between the now dysfunctional SPI firewall and the ARP traffic being passed to the LAN).