Date: Fri, 21 Feb 1997 03:02:14 +1030 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: zach@blizzard.gaffaneys.com (Zach Heilig) Cc: hackers@freebsd.org Subject: Re: sbwait hang? Message-ID: <199702201632.DAA19850@genesis.atrad.adelaide.edu.au> In-Reply-To: <87enebeuqs.fsf@murkwood.gaffaneys.com> from Zach Heilig at "Feb 20, 97 02:39:55 am"
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Zach Heilig stands accused of saying: > > Yep, I think I know the problem... I thought I was wrong when you > mailed me that they were connected by serial ports, but now that you > mention that there are modems on the loop, it's fairly probable that > there is a sequence of bytes that need escaping (and these occur about > 4Meg into the linux tar file). The modem is probably dropping or > corrupting those bytes, and corrupting the packet (this might have > something to do with the compression software in one of the modems). > Other packets would still make it through though. That's an interesting thought. > Run tcpdump on the slip interface, and that should verify what's > happening. I'll try to do that; it can be painful waiting for the leading 3M to go through, so I'll experiment with cutting most of it off. > BTW, what brand of modems are those? One is a Dataplex DPX225 (Rockwell 14k4 chipset), the other is a Banksia MF6 (Rockwell 28k chipset). We've been using them for this link for about two years now; this is the first time I've met this sort of problem. > Zach Heilig (zach@blizzard.gaffaneys.com) | ALL unsolicited commercial email -- ]] Mike Smith, Software Engineer msmith@gsoft.com.au [[ ]] Genesis Software genesis@gsoft.com.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control. (ph) +61-8-8267-3493 [[ ]] Unix hardware collector. "Where are your PEZ?" The Tick [[
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