newton@einstein.eds.com (Richard E. Newton) (05/02/91)
I am looking for information about Apollo's DDS (Domain Datagram Service) protocols that most of Apollo's native services are built on. In particular, I'm looking for design and planning information for bridging or routing the DDS protocols over wide area network links. I have Apollo's "Planning Domain Networks and Internets" document that contains some "Domain Internet Configuration Rules". In one place the document says that the maximum end-to-end delay of a link must be 100 microseconds, in another 100 milliseconds. Which is correct? (I may have an old version of this document) The document also states "the minimum transmission rate over a single link must be at least one megabit per second". Can these protocols be run over slower links? What is the minimum transmission rate that these protocols can run over? We are only looking at connecting 3 networks together. Does topology and number of network hops effect the minimum transmission rate and maximum delay needed for the protocols to work? Are the apollo protocols able to recognize slow speed or congested links and adjust re-transmission timers and timeouts accordingly? Is there anybody out there running these protocols in a WAN environment? Are there any problems associated with doing so? I have tried get these questions answered by HP/Apollo, but they haven't been able to get me in touch with someone that seems to know what they are taking about. Any assistance would be greatly appreciated. Dick Newton Phone 313-265-7226 Electronic Data Systems ARPA newton@einstein.eds.com 750 Tower Drive, PO BOX 7019 UUCP ...uunet!edsews!einstein!newton Troy, MI 48007-7019