Hi
One should check that the network is 100Mbit and working on FullDuplex
mode. As Atro says the 1000 kB/s is slow and the problem seems to
be in network it self. Specially the auto mode may couse problems.
Hannes
On Mon, 22 Jan 2001, Atro Tossavainen wrote:
> Hejsan Per,
>
> > --- spec ---
> > SSH2.0.13 -- Solaris 2.7 -- SPARC 220R -- Extreme24 (switch)
> >
> > Hi,
> >
> > I Sent a 50MB file (from host a to host b) with scp and got ~185kb/s
> > over a 100Mbit switched full duplex LAN.
> >
> > Is that good or bad?
>
> Very bad indeed!
>
> SSH2 uses the Triple-DES cipher by default, if I'm not entirely mistaken.
>
> Try "scp -c blowfish ..."
>
> If you get ~1000 kB/s on ftp on a 100 Mbit switched LAN, that's bad too
> and you should look into the causes of your networking problems.
>
> In a similar setup, I would see maybe ~5-6 MB on unencrypted local
> traffic (on hosts on the same LAN).
>
> I tested scp'ing the Linux kernel (24 MB gzipped) to localhost on our
> E220R (450 MHz CPU). It encrypted the package using 3DES on SSH1 at
> less than 1000 kB/s, using IDEA at 1700 kB/s, and Blowfish at close
> to 4000 kB/s. Doesn't explain why you only got <200 kB/s, however.
>
> Then again, I have very little experience on SSH2.
>
> > Compression doesn't help.
>
> That's normal. If you've read my recent postings on the list, you have
> repeatedly heard that compression is an extra burden on the CPU that
> can only help on really slow lines.
>
> mvh,
>
> --
> Atro Tossavainen (Mr.) / The Institute of Biotechnology at
> Systems Analyst, Techno-Amish & / the University of Helsinki, Finland,
> +358-9-19158939 UNIX Dinosaur / employs me, but my opinions are my own.
> < URL : http : / / www . iki . fi / atro . tossavainen / >
>
Hannes Niemi
[EMAIL PROTECTED]
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Osoite: Tekniikantie 15a D, PL 405,
02101 ESPOO
