Date: Sun, 4 Jan 1998 17:46:01 -0800 (PST) From: Bill <bill@wagill.com> To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/5429: Ethernet collision during file transfers into FreeBSD machine. Message-ID: <199801050146.RAA00322@duchess.wagill.com> Resent-Message-ID: <199801082230.OAA09062@hub.freebsd.org>
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>Number: 5429 >Category: kern >Synopsis: Ethernet collision during file transfers into FreeBSD machine. >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Class: support >Submitter-Id: current-users >Arrival-Date: Thu Jan 8 14:30:03 PST 1998 >Last-Modified: >Originator: William Gill >Organization: >Release: FreeBSD 2.2.5-RELEASE i386 >Environment: FreeBSD duchess.wagill.com 2.2.5-RELEASE FreeBSD 2.2.5-RELEASE #0: Tue Oct 21 14:33:00 GMT 1997 jkh@time.cdrom.com:/usr/src/sys/compile/GENERIC i386 Network topology: - FreeBSD machine with Linksys 16-bit ISA ethernet card; - Windows95 machine-1 with Linksys 32-bit PCI ethernet card; - Linksys 8-UTP + 1-BNC port ethernet hub; - FreeBSD machine, Win95 machine-1, hub on coax cable; - Windows 95 macine-2 with Lynksys 32-bit PCI ethernet card; - Lantronix LPS1 print server; - Hub, Win95 machine-2, print server on twisted-pair cable. >Description: With FreeBSD 2.1.7 transfers between Win95 machine-1 (on coax) and FreeBSD machine (on coax) took place at nearly 10 mbps with very few collisions (as displayed on hub collision light). Once I upgraded to 2.2.5, when doing file trasnfers FROM Win95 machine TO FreeBSD machine of a very large file (ie: 20 MB), the collision light on the hub stays on permanently during the transfer, showing collisions for every data burst, and forcing a slowdown of the transfer rate. In contrast, transfers FROM the FreeBSD machine TO the Win95 machine are collision-free, and run at nearly 10 mbps. Nothing in the hardware has changed between 2.1.7 and 2.2.5. On a possibly-related problem, if I move the Win95 machine connection from BNC (coax) to the hub (twisted pair), transfers FROM Win95 TO FreeBSD are *very* slow, peaking at about 4 mbps; transfers FROM FreeBSD TO Win95 are not as fast, but as high as 8 mbps. It seems to me that something has changed in the way FreeBSD handles the ethernet card, since I have not touched a thing in the hardware when I upgraded from FreeBSD 2.1.7 to 2.2.5. >How-To-Repeat: Problem is consistently repeatable. >Fix: You tell me. >Audit-Trail: >Unformatted:
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