Older and newer product standards have sometime needed a firmware update to coexist peacefully.

Not trying to argue - just trying to help and make sure it really matters - as per the above it wouldn't in some use cases. Are you sure it actually breaks multicast for remote multicast aware...

"work at" does not equal usable bandwidth. According to SmalNetBuilder tests, typical best case throughput for AV500 devices is 40-50mbits See...

As powerline is effectively shared bandwidth anyway, I can't see that it makes much difference if the powerline devices send multicast as broadcast anyway.

" This is an absolutely vital feature for IPTV - without IGMP, multicast streams aren't properly directed to the devices viewing those streams, but instead convert into broadcast streams that flood...

The 9020 requires 3.2.4b to be stable (now on UK support site). And the 7020s would ideally require the latest firmware to be fully compatible with it... Check the other EU support sites.