From owner-freebsd-hackers Thu Feb 20 08:32:38 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id IAA21052 for hackers-outgoing; Thu, 20 Feb 1997 08:32:38 -0800 (PST) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id IAA21043 for ; Thu, 20 Feb 1997 08:32:32 -0800 (PST) Received: (from msmith@localhost) by genesis.atrad.adelaide.edu.au (8.8.5/8.7.3) id DAA19850; Fri, 21 Feb 1997 03:02:15 +1030 (CST) From: Michael Smith Message-Id: <199702201632.DAA19850@genesis.atrad.adelaide.edu.au> Subject: Re: sbwait hang? In-Reply-To: <87enebeuqs.fsf@murkwood.gaffaneys.com> from Zach Heilig at "Feb 20, 97 02:39:55 am" To: zach@blizzard.gaffaneys.com (Zach Heilig) Date: Fri, 21 Feb 1997 03:02:14 +1030 (CST) Cc: hackers@freebsd.org X-Mailer: ELM [version 2.4ME+ PL28 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk 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 [[