Trying to upgrade my I/O with a managed hirschman RS20E switch, I've been through AB's whitepaper. I've got 2 Hirschmans working fine but with less traffic going to ENBT modules now but when I try to connect the 3rd my modules go on and offline like crazy. I've got IGMP snooping enabled, I've tried increasing my timeslice, been through MANY hirschman settings. I'm communicating to a Control Logix processor, initailly communication is fine but then I start losing the modules. I'm not showing any collisions or CRC errors in the Hirschman statistics either...can anybody help???