JOHNSON@NUHUB.ACS.NORTHEASTERN.EDU.UUCP (02/05/87)
>Everything was working fine until we connected another segment >of Ethernet into the "control" port of the Delni. . . . >After much discussion and testing, we have theorized the following: > The Deqna on the Micro PDP-11 is sending out a heartbeat > pulse and depending on the position of the switch on > the Delni the heartbeat is either responded to (turned around) > by the Delni ("Local" setting) or the heartbeat is not > answered by the Delni and/or the rest of the network ("Global"). . . . >Any help, comments, suggestions would be greatly appreciated. > Mike Pung > Oak Ridge National Lab > Pung%ornl-ncc@ornl-msr.arpa At Northeastern University we had a similar problem. After much research and talking to some of our coop students who work for DEC we came to the sam conclusion. I have a copy of ethernet standard one (1). In it there s no mention of the heartbeat. There is however a standard number two (2) that I am trying to get hold of. The heartbeat is in there. We solved the problem by getting a H4000. Everything works fine now. We wanted an H4000A but nobody made them at the time. Any body shipping them now? DEC wasn't much help though. We had to solve it on our own. Chris Johnson Northeastern University csnet: johnson@nuhub.acs.northeastern.edu arpa: johnson%nuhub.acs.northeastern.edu@relay.cs.net at&t: (617) 437-2335