Date: Sun, 09 Jun 1996 18:16:11 -0700 From: David Greenman <davidg@Root.COM> To: Dave Andersen <angio@aros.net> Cc: taob@io.org (Brian Tao), root@edmweb.com, isp@freebsd.org Subject: Re: Computer disappears from the network, then reappears...? Message-ID: <199606100116.SAA16312@Root.COM> In-Reply-To: Your message of "Sun, 09 Jun 1996 14:42:48 MDT." <199606092042.OAA11101@terra.aros.net>
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>Lo and behold, Brian Tao once said: > >> Yup... many times under 2.1.0R and only once so far with >> 2.2-960501. > > Here's another once under -stable. > >> > The machine is a 16-meg Pentium 100 with Asus Triton motherboard and >> > SCSI-II hard drive on an Adaptec 2940. The ethernet card is an SMC >> > EtherPower 10/100 in 10 mbps (standard ethernet) mode. >> >> The odd thing here is that only one machine here (that I know of) >> exhibits this behaviour. It is a 486DX4/100, ASUS P/I-486SP3G >> motherboard with 32MB RAM and the same EtherPower card, running at 10 Mbps. >> We have a dozen other P133 servers with the same model of SMC's and > > The machine of ours that hung is a P100, triton, 2 adaptec 2940s, and >an Intel EtherExpress 10/100 running at 10Mbps. > > I think I smell a common feature -- we're all using the fxp0 driver. >This server never exhibited this before I dropped in the EtherExpress. >Are there any known bugs in the driver? (I would assume not). There aren't any known bugs in the driver, but the 82557 chip (the NIC) has a bug that causes it to "go away" when it sees any garbage data. There is a "work around" that basically amounts to resetting the chip if you don't see any traffic in <n> seconds. I think this is pretty disgusting, however, so I didn't implement it. The newer revision chips are supposed to have this problem fixed. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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