Weirdly enough, I have no problem with running the bridge and SIMH on the same machine - caveat: I am running on OS X. At the moment, I have the following: - Gorilla (OS X 10.4.something) running the bridge on interface 0 - GORVAX (SIMH, OpenVMS 7.3, MULTINET) running on interface 0, acting as a router between the bridge and a MULTINET tunnel to the outside - CHIMPY (running VMS 8.3, TCP/IP services), acting as an end node on the bridged network So on the main host, there's only one interface and it all works (all = DECNET, I can't get IP traffic from Gorilla to GORVAX). Sampsa On 2 Mar 2009, at 09:50, Angela Kahealani wrote: On Sunday, 2009-03-01 21:50:24 Johnny Billquist wrote: The one limitation is that it is usually problematic to have the same machine that is running the bridge also participate as a DECnet node on the same interface. Because then you need to see all your own outgoing packets. Not all hardware will do that for you. So, if you try to run in one machine, with hardware that can't see its own packets, then you need 3 interfaces, 1: To talk TCP/IP / UDP for main interface plus UDP side of bridge 2: DECnet side of bridge 3: DECnet speaking software or a machine with only one interface running the bridge program, and a machine with two interfaces, one for TCP/IP/UDP and one DECnet. Or have I still misunderstood? Aloha, Angela -- "(I'll) Be Seeing You..." All information and transactions are private between the parties, and are non negotiable. All rights reserve without prejudice, Angela Kahealani. http://kahealani.com