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Text File  |  1992-11-08  |  1.5 KB  |  31 lines
  1. Newsgroups: comp.sys.sun.hardware
  2. Path: sparky!uunet!zaphod.mps.ohio-state.edu!swrinde!sdd.hp.com!spool.mu.edu!yale.edu!qt.cs.utexas.edu!cs.utexas.edu!torn!utzoo!henry
  3. From: henry@zoo.toronto.edu (Henry Spencer)
  4. Subject: Re: Sun is violating the Ethernet-Spec with its
  5. Message-ID: <BxC6qA.FIz@zoo.toronto.edu>
  6. Date: Sat, 7 Nov 1992 08:10:55 GMT
  7. References: <1992Nov2.230122.6670@Informatik.TU-Muenchen.DE> <1992Nov4.165432.4917@news.duc.auburn.edu>
  8. Organization: U of Toronto Zoology
  9. Lines: 20
  10.  
  11. In article <1992Nov4.165432.4917@news.duc.auburn.edu> elling@eng.auburn.edu writes:
  12. >Rule #1 for ethernets, turn off SQE.  I know of no hardware made in a
  13. >*long* time that needs SQE...
  14.  
  15. Are you sure you don't have this backwards?  It's the old hardware that
  16. *didn't* do SQE and could react badly to it.  A fair bit of new stuff
  17. does get unhappy if it doesn't see SQE.
  18.  
  19. >... If you have SQE enabled, the transceiver
  20. >can put extra junk on the trunk that may contribute to collisions.
  21.  
  22. Documentation, please, preferably including identification of specific
  23. models of transceiver which do this.  SQE is supposed to be entirely,
  24. completely, 100% local to the drop cable.  No properly-functioning
  25. transceiver will put anything on the Ethernet itself as a result of
  26. SQE.  (With one proviso:  that you follow the rule saying "no SQE on
  27. transceivers connected to a repeater".)
  28. -- 
  29. MS-DOS is the OS/360 of the 1980s.      | Henry Spencer @ U of Toronto Zoology
  30.               -Hal W. Hardenbergh (1985)|  henry@zoo.toronto.edu  utzoo!henry
  31.