kml@mosquito.cis.ufl.edu (Kevin Lahey) (10/16/90)
I've always been a bit disappointed that the dogfight program could only be used on my local net, since it uses broadcast UDP packets. Has anyone hacked the program to use TCP connections, instead? It seems like, IMHO, I could get the program set up so that I could play with someone at a really remote site this way. Am I missing something? Has this already been done? Is it a really lame idea? Am I asking too many questions? :-) Thanks, Kevin kml@mosquito.cis.ufl.edu "X11 -- the MULTICS of window systems."
vjs@rhyolite.wpd.sgi.com (Vernon Schryver) (10/16/90)
In article <24904@uflorida.cis.ufl.EDU>, kml@mosquito.cis.ufl.edu (Kevin Lahey) writes: > I've always been a bit disappointed that the dogfight program could only > be used on my local net, since it uses broadcast UDP packets. ... With luck, the SGI IGMP expert will answer, urging everyone not to panic, since dog now knows about UDP multicast, has an officially registered multicast port, and the IGMP multicast router is standard in 3.3. SGI once again has a single, coporate circus because of it. The circus had been fragmented since dog switched from XNS multicast to UDP broadcast. If you were at Interop, you might have noticed people in the NOC and the Interop booth dogfighting with each other and with people in the SGI booth, despite the fact that widely separated networks were involved. Our expert had created an IGMP tunneling router on one of the IRIS's. If someone happened to set up such tunneling routers on the Internet, or if IGMP gets popular in the Internet, people with direct connections to the Internet will be able see how many dog fighters are required to saturate the NFS backbone. I did my part by twisting arms for IGMP at router vendors, who said "wait until OSPF." Is dogfighting between academic institutions a "fair use?" Will dog work with the packet delays in the Internet? Sounds like "research" to me. Vernon Schryver, vjs@sgi.com P.S. Since the SGI Internet gateway is too paranoid to IP forward, we will not be among you lucky bad guys filling up the Internet. P.P.S. Remember, IRIS's don't kill networks, people kill networks.
blbates@AERO4.LARC.NASA.GOV ("Brent L. Bates AAD/TAB MS361 x42854") (10/18/90)
A while back someone posted some diffs to dog that would allow you to dogfight with ONE other machine. I don't remember who. I think there was also some other changes to reduce network traffic. These should be in the info-iris archives or at least some of them. -- Brent L. Bates NASA-Langley Research Center M.S. 361 Hampton, Virginia 23665-5225 (804) 864-2854 E-mail: blbates@aero4.larc.nasa.gov or blbates@aero2.larc.nasa.gov