Sampsa Laine wrote: Is it possible to run a cluster over both ethernet and FDDI? Basically, I'd like to connect Machine A -> B using ethernet and B -> C using FDDI - is this possible? Sampsa . Unfortunately that configuration violates the rule of full connectivity. All cluster members must have direct connectivity to other members. But if you add a FDDI-Ethernet-bridge, you should get a "legal" configuration. Kari