Date: Sun, 28 Jan 1996 00:27:21 -0800 From: Jonathan Hahn <hahn@and.com> To: freebsd-bugs@freebsd.org, freebsd-isp@freebsd.org Subject: Latency problem with pppd/Telebit Netblazer Message-ID: <199601280827.AAA17566@and.com>
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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. -jon hahn@and.com http://and.com/hahn P.S. I don't subscribe to these groups, so e-mail directly if trying to reach me.
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