@swifty  Because the MX does not handle multicast IPTV properly, I have put another gateway device ahead of the MX and the MX now uplinks to a LAN port on that gateway, so the config I currently have on the MX WAN port is not helpful.   However, I use a Vigor 130 modem configured as below: VDSL 2 enabled (Tag value 101 - Priority 0) PPPoE/PPPoA disabled MPoA (RFC1483/2684) enabled (Bridge mode enabled) PPPoE/PPPoA only needs to be disabled if using multicast IPTV (eg BT Sport), similarly MPoA is only enabled to assist with smooth multicast operation. It works perfectly.   The gateway appliance ahead of the MX has its WAN port configured: Connection type: PPPoE User name: bthomehub@btbroadband.com Password: BT Smart Queues: Disabled The public IP address of the MX is passed through from the appliance it is connected to.   Before I had to put the additional gateway device ahead of the MX, it connected to the Internet in exactly same manner as the connection I have described above.   Most BT FTTC cabinets can handle Jumbo Packets, but BT PPPoE maxes out at 1520, so make sure Baby Jumbo Packets are enabled   ... View more

@lxLondon wrote: The BT Smart Hub has 4 ports in the back. Port 1 is used for the MX64 and Port 2 for the BT TV Ultra HD box. It's a simple solution with the downside that the TV box is not in the Meraki network. I asked if you were using the second LAN port on the modem as you claimed to have attached the BT TV Ultra HD box to a "BT modem".   However, it transpires that you have actually attached it to a BT HomeHub router.   As you say, what you have done "works", but, unless BT has upgraded the HomeHub recently, you may have potential Double-NAT issues.   I am not quite sure what the downsides are in connecting the STB to the BT HH compared to attaching it to the MX/MS stack.   In our analytic network, we have dual stacks. The BT STB is connected by Ethernet to a switch on the non-Meraki stack (which supports IGMP-Proxies and Snooping). The STB is connected to a TV by an HDMI 2.0 cable. The TV is connected to a switch on the Meraki stack using an Ethernet cable. This is a rock solid arrangement. We are not interested in how much bandwidth the STB consumes, we have "plenty", and the statistics are available on the third-party dashboard, we do check it to ensure that there is no multicast traffic leakage.   It would be interesting to know if the BT HH reflects multicast video steams out all the LAN ports.   ... View more