Date: Sat, 13 May 2000 13:39:11 +0100 From: Brian Somers <brian@Awfulhak.org> To: "Andrey A. Chernov" <ache@FreeBSD.org> Cc: Igor Timkin <ivt@logger.gamma.ru>, current@FreeBSD.org, Jonathan Lemon <jlemon@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org, brian@hak.lan.awfulhak.org Subject: Re: cvs commit: src/sys/netinet tcp.h tcp_input.c tcp_output.c tcp_timer.c tcp_var.h Message-ID: <200005131239.NAA29044@hak.lan.Awfulhak.org> In-Reply-To: Message from "Andrey A. Chernov" <ache@FreeBSD.org> of "Thu, 11 May 2000 12:00:34 PDT." <20000511120033.A61202@freebsd.org>
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> On Tue, May 09, 2000 at 02:56:58PM +0400, Igor Timkin wrote: > > The same problem. Local is openssh (current), remote is ssh-1.2.22 (2.2.6), > > slip ~24kbps connection. Remote log: > > May 9 09:59:17 crocus sshd[21285]: fatal: Local: Corrupted check bytes on input. > > This thing is even worse - I notice the same problem occurse in > CURRENT->CURRENT ssh connection, both with NewReno! > It means that NewReno implementation have some internal errors when two > identical -currents can't speak each other properly sometimes (when modem have > long 30secs retrain). This has been happening to me in environments with high packet loss, and before the NewReno changes went in. It was only happening in a rather dubious environment were there was high packet loss (compressed PPP over uncompressed PPP over a saturated ISDN dialup that drops up to one in every three packets). There were other bugs involved too - see recent updates to nat_cmd.c, so I never really took the whole thing too seriously (apart from suggesting to root@freefall that they shouldn't worry). I'm still seeing these errors: ipfw: -1 Refuse UDP 194.242.139.171 62.7.110.151 in via tun1 Fragment = 185 But haven't looked into them too deeply for the same reasons. All I'm saying is that I wouldn't suspect that the problem is entirely NewReno but rather that the NewReno stuff may be irritating some other problem(s). > -- > Andrey A. Chernov > <ache@nagual.pp.ru> > http://nagual.pp.ru/~ache/ -- Brian <brian@Awfulhak.org> <brian@[uk.]FreeBSD.org> <http://www.Awfulhak.org>; <brian@[uk.]OpenBSD.org> Don't _EVER_ lose your sense of humour ! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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