I was able to set up the cluster, node1 can see node2 in HA system status, but node2 stops at startup at "Starting ASG High Availability clustering - waiting for STP on eth3" and shuts down after about 5 mins.
7.901 is running under vSphere 4, I already tried with "other x64 linux" and "other x86linux" with "Intel E1000" and "flexible" NIC.