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#! rnews 2070 bsd Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!nntp.coast.net!lll-winken.llnl.gov!enews.sgi.com!news.mathworks.com!newsfeed.internetmci.com!news.sesqui.net!uhura.phoenix.net!usenet From: Cam Johnson <cam@solidsys.com> Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: FTP performance with pppd Date: Sun, 04 Aug 1996 11:19:20 +0000 Organization: SS NetCon Lines: 38 Message-ID: <32048738.41C67EA6@solidsys.com> References: <32037C10.41C67EA6@solidsys.com> <32041EE6.8F6@www.play-hookey.com> <4u1rrj$6b2@ucthpx.uct.ac.za> NNTP-Posting-Host: dial8.breh.phoenix.net Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.0b5aGold (X11; I; FreeBSD 2.1.5-RELEASE i386) S Marquard wrote: > > Ken Bigelow <kbigelow@www.play-hookey.com> writes: > > >Cam Johnson wrote: > >> > >> I'm experiencing poor ftp transfer rates when using pppd. Approx 600 > >> byes per sec > >> via pppd and 2800 bytes per sec when using ijppp. This is true for both > >> 2.1.5R and current. Has anyone else seen this as my search of the > >> archives > >> has yielded nothing. > >> > >> Thanks > > >Too many possibilities to be sure without further data, but... > > >Try adjusting your mtu size. As long as I'm on a dialup line, I set mtu > >to 576. When/if I go to ISDN I'll up that. > > I have got throughput of about 2700bps using pppd, vs 3100bps using ijppp > (with 28.8 modems). Adjusting the mtu/mru values hasn't helped. > I'd also like to know what the difference is. > > Stephen Marquard > scm@silver.wcape.school.za > smarq@ucthpx.uct.ac.za Lokks as though I have at least partially solved my performance problem by turning off vj compression i.e. in the /etc/ppp/options adding -vj. Performace is still not up to that of ijppp, and I know that there have been some bugs in the pppd vj implementation in the past. -- Cam Johnson SS NetCon, 5610 Guhn Rd., Houston, TX 77040 713-895-0500 or SS Netcon, 3010 Possum Trot, Brenham, TX 77833 409-277-9507 FAX 713-690-2722 email cam@solidsys.com