kenton@space.mit.edu (Kenton C. Phillips) (05/13/89)
Summary: Telnet hangs shortly after logging into our Microvax-II, running Ultrix 2.2. Details: NCSA Telnet 2.2 running on a Mac IIcx with system 6.0.3 (but same problem with other macs, e.g. Plus and 6.0.2), connected to AppleTalk. Kinetics FastPath 2 gateway to the ethernet, running KIP release of 6/88; ROM version 3.0 (4.2 gives me a headache). The Microvax-II on the ethernet is running Ultrix 2.2. Telnetting to other machines - Suns running SunOS 3.x, or Microvaxen running BSD 4.3 - it seems to work normally. But I log in to the Ultrix machine and do something to generate a page or two of text (e.g., `ps -aux`), and the connection hangs halfway through. The window on the Mac disappears after a while, presumably because of timeouts. Any suggestions on why the connection would die? Thanks. -- Kenton C. Phillips kenton@space.mit.edu
krauskpf@uxe.cso.uiuc.edu (05/17/89)
DEC's Ultrix system ships with IP trailers turned ON. I admit it is a failing of NCSA Telnet to not handle trailers, even passively, but I don't hear a lot of crying when they are turned off either. Performance gains, even for VAXen, have been debated on various mailing lists before. If NCSA Telnet hangs when talking to an Ultrix host when it should be displaying a large page of text, you probably have trailers turned on in the Ultrix system. To turn them off, refer to the ifconfig man page and include the -trailers option on the ifconfig line for your boot sequence. Tim Krauskopf NCSA yes, I do think we should eventually do something like Sun's "handle anything" receiver which never sends, but can receive trailers.