@michmoor said in Just installed the release; Something wrong with multicast !!!:
192.168.100.15 is appearing in multiple vlans [which is fine and can happen].
No it shouldn't... There is no reason at all that some source IP on network X should ever be seen on network Y.. If it is there is no isolation at layer 2.. Your just running multiple L3 on the same L2. This is not "fine" - does it happen, can it happen.. Yeah but unless your running the multiple L3 on purpose - maybe transition transition from one L3 to a different L3.. Some sort of loopback address over a different network, etc.
Multicast sure be seen on any interface in an L2.. But your interfaces at L3 should be in different L2s - or your not actually isolating anything.. And you might as well just get some dumb switches and just run multiple L3s on them and call it hey look ma I am segmenting ;)
The only time you should see multiple different source L3 networks hit a interface on an L2 is if that interface is a transit network.. But that L2 is different than your source networks L2, and you wouldn't see multicast on it.
You have something odd in your network, be it by design or accident is the question. Are you for some reason running multiple L3s on the same L2?