Do any of yall have any BSOD services that pass tagged traffic through the modem upstream to the CMTS. So far I have only found 1 modem (SB6121) that passes the single tag with no issues in my testing. I have tried an Arris CM820 (fw=110a) but it drops the vlan tag randomly, with packet size varying from 100 bytes to 1500 bytes. Ticket currently open with Arris on that. I have also been unsuccessful with bridging any router modems and passing tagged traffic as well (SBG6580, DG860). I may be missing something in the configuration on those.
I have the same issue with CM820. Multitag forwarding is screwed.
EPC3008 and 3010 forward multitag fine, but they don't have Downstream Unencrypted Traffic Filtering support and MAC address ageing feature work improper too.
Don't try CM with routers. Their internal switch chip is now always tag aware, but can't stack proper user traffic proper to internal CPU interface.
DUT on the 6121 does not work either. I have a 3010 being shipped to me next week for testing. What are you seeing with the mac aging filter on the 3010? Are you offering a tagged service to your customers? If so what modem has worked the best for you?