On May 8, 2013, at 4:43 PM, Bob Armstrong wrote: I vaguely remember reading that there's simh support for it, but I don't see it. =20 =20 I don't think there's any specific simh support for a Multinet port, but you can of course run Multinet "thru" simh (i.e. install Multinet on a si= mh VAX/VMS system and tunnel DECnet thru the simh emulated Ethernet controller). =20 =20 I assume you're asking about a simh invention that talks to a remote Multinet VAX/VMS system on the simh host side and pretends to be some oth= er device (like a DMR/DUP/DMV/whatever) on the simulated side - I've never s= een anything like that. =20 DECnet/Linux can supposedly emulate a Multinet tunnel. Is that what you're thinking of? But in that case you're running DECnet on the Linux host and simh has nothing to do with it. I want to learn how to make my DECnet speak Multinet. Rob mentioned wantin= g to do the same for his "user mode router". So it would be another DECnet= datalink. Point to point or Ethernet-like? Yes, I saw the DECnet/Linux code. It's rather puzzling because it seems to= tie into a tun/tap device -- so it expects Ethernet behavior. But then it= converts to short headers, which suggests point to point behavior. Which = is it? The data headers are only a tiny part of the difference between the= two datalink flavors... paul Multinet is a PTP driver, it can speak UDP or TCP and there was a message a year sgo or so here on th meailinglist from the people at TGV that did it explaining the details. -P