VxRail CISCO 3548

I have a CISCO 3548 ToR Switch (System Version 9.2) connected to VxRail Nodes 4.7. The Discovery phase is going OK, but then fails at one of the later steps. CISCO are saying that the Switch does support IPv6 Multi-Casting and this is the reason why. I have not seen a list of supported switches, but from other queries in this Community, I can see that there are 'known' issues which have been experienced with this Switch. Has anybody got a config guide for this switch which shows exactly what should be setup? Any help would be appreciated.