mikes@iuvax.cs.indiana.edu (Michael Squires) (05/28/91)
In article <91144.182624RBYAML@ROHVM1.BITNET> RBYAML@ROHVM1.BITNET (Aengus Lawlor) writes: >In article <227@gordon.UUCP>, jpd@gordon.UUCP (Jim Drummey) says: >>however, allows a login OK but hangs as soon as transfer starts. Is there a >>known problem with the NCSA ftp? Other ftps work. We have a heavily used thinnet network (35+ Suns, many NFS mounts; 8800 VAX with ULTRIX, etc., etc.) and have standardized on the WD8003E. We had trouble with the 3C501 and 3C503 under NCSA Telnet, until recently no trouble with the 8003E. It appears that the changes in SunOS 4.1.1 may have finally caused the WD8003E's to crash (lockups under NETWATCH after large NFS packets (multple UDP "fragments"); DESQView 386 crashing with illegal instruction errors) and we've found that running WD8013's solves the Telnet problem. The 3C501 and 3C503 also do not work properly in an SCO UNIX V box on the same wire, WD8003E works fine. ftp works reliably for us only if started at the UNIX host end and only if one file is transferred at a time; mput/mget can cause crashes or corrupted files. If we use the PC ftpbin.exe performance is erratic. rcp from the UNIX host to the PC works most of the time for small files but crashes with large files (400K or more). The use of mput/mget will usually cause problems, including corrupted files. "lpr" does not work reliably either (on some systems it works almost all the time, on others it just as reliably locks up). These problems seem to occur whether we use NCSA 2.2, NCSA 2.3 beta, the NCSA 2.2D (from Clarkson?), or CUTCP Telnet with or without the packet drivers. The Mac version of NCSA Telnet (2.2 or 2.3) does not seem to have these problems. I believe these problems are due to our network, which is heavily loaded (35 plus Suns, VAX 8800, Alliant, NeXT's, etc., etc.) and which has very long runs (600 feet) of marginal thinnet (impedance isn't right, varies from 52 to over 60 ohms). Systems on subnets with little traffic have none of these problems. -- Mike Squires (mikes@iuvax.cs.indiana.edu) 812 855 3974 (w) 812 333 6564 (h) mikes@iuvax.cs.indiana.edu 546 N Park Ridge Rd., Bloomington, IN 47408 Under construction: mikes@sir-alan.cica.indiana.edu