[HECnet] Old protocols in new ones

I didn't see that. I have never used the product called Multinet myself. When I use the term "Multinet" it has always referred to the encapsulation of DECnet point to point routing packets with a 4 byte header, sent either as UDP packets or over a TCP stream. This is what I understand to be the so-called "Multinet datalink" (which as I have said many times isn't an actual datalink and reflects only the utter ignorance of its creators). That "protocol" should be avoided; if there is no alternative then only the TCP variant should be used. The UDP variant is utterly unfit for any use in any application whatsoever and always has been; I should probably delete it from PyDECnet rather than permit it with a warning as I currently do. If the product called Multinet also supports DDCMP, that's a different matter entirely. I have never heard of any such thing. How does it work? Is it compatible with DDCMP over TCP as implemented in SIMH? If yes -- and even if it only supports only connect or listen but not both concurrently as SIMH does -- it should work with PyDECnet. I'd be interested in hearing about it. If it isn't compatible with the SIMH version for some other reason, then I would expect it not to work with PyDECnet either. If so, and if someone can supply me with a description of how it operates, hopefully with at least some protocol captures, I may be able to add support for it. paul