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Date:      Tue, 22 Nov 2011 16:09:53 +0000
From:      Matthew Seaman <>
To:        Bas Smeelen <>
Cc:        FreeBSD Questions <>
Subject:   Re: 9.0-PRERELEASE slow scp transfer
Message-ID:  <>
In-Reply-To: <>
References:  <>

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On 22/11/2011 15:17, Bas Smeelen wrote:
> When i copy a file with scp which is a few hundred megabytes on2. from =
> get about 130 KB/s
> I can find nothing in the logs or netstat errors on this 9.0-PRERELEASE=
> I have switched network kabels and ports on the switch.
> How could i further investigate?

Check the duplex settings in ifconfig(8) output on all three machines.
They should all say:

   media: Ethernet autoselect (1000baseTX <full-duplex>)

assuming you're not forcing everything to a particular speed.  Any
mention of '100baseTX <half-duplex>' indicates a failure to negotiate
the link settings, which could well be due to a hardware problem.  Mind
you, in that case you'ld see plenty of errors in the output of 'netstat -=

If that's not the problem then it sounds like you've eliminated all the
obvious causes.  Which means a bug in 9.0-PRERELEASE, so please bring
this up on freebsd-current@... where it should come to the attention of
the developers working on getting 9.0 out of the door.  Include 'pciconf
-lbv' output for the NICs and PHYs on all three machines if you would be
so kind.



Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
                                                  Flat 3
PGP:     Ramsgate
JID:               Kent, CT11 9PW

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