Date: Mon, 29 Jan 1996 12:16:25 +0100 (MET) From: Andreas Klemm <andreas@knobel.gun.de> To: Jonathan Hahn <hahn@and.com> Cc: freebsd-bugs@FreeBSD.org, freebsd-isp@FreeBSD.org Subject: Re: Latency problem with pppd/Telebit Netblazer Message-ID: <Pine.BSF.3.91.960129121235.520B-100000@knobel.gun.de> In-Reply-To: <199601280827.AAA17566@and.com>
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On Sun, 28 Jan 1996, Jonathan Hahn wrote:
> I am using pppd under FreeBSD 2.1, my ISP (Bay Area Internet
> Solutions) has a Telebit Netblazer. Ever since I switched to this
> ISP, I noticed a very annoying latency on outbound characters. I
> could type text into an xterm window and it would take from 1-4
> seconds to get transmitted over my modem; and I could get 30+Kb/sec
> inbound but just ~4Kb/sec outbound. (I didn't have this problem
> with my previous ISP (Best) who uses Livingston boxes.)
>
> I tried one change to my software/hardware config after another.
> I finally found the cause of the problem: it goes away when I
> disable Van Jacobsen header compression (-vj on the pppd command
> line). My ISP says everyone else uses VJ compression and has no
> problem. All I know is, it caused me much grief.
>
> Hope others can benefit from my experience.
Same for me. When I switched from FreeBSD 1.1.5.1 to FreeBSD 2.X
(don't remember exactly the release), then the Xyplex Terminal
Server of my ISP simply hung (the whole t-server!). The problem could
be tracked down. So after disabling VJ compression completely on the
Xyplex for my machine (ppp account) cured the problem.
We didn't try -currents ppp vj compression 'til yet.
--
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