They aren't supported on Integrity. Only Ethernet LANs are. Sampsa Laine wrote: Hmm, not ideal. I do have 3 FDDI cards, do you know if the DEFPA cards work on OpenVMS for Integrity boxes? Sampsa On 29 Sep 2009, at 19:50, Kari Uusim ki wrote: 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 .