mcr@julie.UUCP (Michael Richardson) (04/09/89)
Guy Harris wrote alot along the lines of: >Opens on the "dial-in" device block until carrier comes up (unless >you've not turned "soft carrier" off - more on this below). Opens on >the "dial-out" device succeed even if carrier isn't up, so that you can >talk to the modem. In addition, once the dial-out device is open, any >opens on the dial-in device that are waiting for carrier to come up will >*NOT* complete when carrier comes up! CD will come up if the dial out At the Carleton Department of Electronics there are two Metheus workstations that were connected to the SUN network by Ethernet. Unfortunately the ethernet cards are less than perfect and tend to hang the Campus-wide network... They have been removed from the ethernet. The need to transfer files (the plotter is connected to the Metheus) is great and a UUCP link is going to be set up. I didn't think there would be any problem on the SUN side making it bidirectional (there is an ALM board there), and this thread confirms this. However, the Metheus has dial out lines and dial in lines. They are not connected, so either the Metheus polls or the SUN polls. (Not both.) Polling every five minutes (or every minute) is not hard (the connection is hard wired) but not as "elegant" as just invoking uucico when needed. (The SUNs and Metheus are around the corner, down the hall. Invoking uucico on the other end manually isn't convenient) Since there are two Metheuses that need to be connected (so the other one can share the plotter too. We'll worry about how to set up lpr/vpr later.) and we were thinking of running two lines (there are lots of spare serial ports on both ends) from/to the SUN I had thought of connecting things in a circle: chapel-------->mccoy ^ / | / | / uhura<----/ (uhura is a SUN. Can you guess what the rest of the machines are called?) (arrows indicate who polls who) Would this work? In order to send from chapel to uhura, chapel sends a dummy file to mccoy!uhura!chapel, causing mccoy to poll uhura, and uhura to poll chapel, getting the transfer done... Or would it be better just to send the file (likely large, but infrequent) to mccoy!uhura!/user/x/myfile? This is probably overkill considering the low volume of stuff that is going to be transfered, but it has become a bit of a mental exercise... (BTW: none of them are HDB. I don't know enough about HDB to know if it would even solve this, or if any of this is really a problem. Two working Ethernet boards would solve everything :-) -- :!mcr!: Michael Richardson Amiga v--------+ UUCP: uunet!attcan!lsuc!nrcaer!julie!mcr | INTERNET mcr@doe.carleton.ca Fido: Michael Richardson @ 1:163/109.10<--+ Alter @ 7:483/109.10