Multicast not working with IPoIB with ESXi 6.5

My lab is running:

  • ESXi, 6.5.0, 4887370
  • OFED 1.8.2.5
  • ConnectX-2 MHQH29C with 2.9.1000
  • IS5035 switch with subnet manager

I followed the instructions here: https://forums.servethehome.com/index.php?threads/10gb-sfp-single-port-cheaper-than-dirt.6893/page-9#post-145423 https://forums.servethehome.com/index.php?threads/10gb-sfp-single-port-cheaper-than-dirt.6893/page-9#post-145423

I am able to get IPoIB working and all of the hosts can ping each other.

However, multicast is not working. How can I get multicast to work? It is preventing vSAN from working.

The solution was to upgrade to ESXi 6.5 update 1 which contains vSAN 6.6. vSAN 6.6 removes the need for multicast.