On 05-Jan-01 Tom Samplonius wrote:
>
> On Thu, 4 Jan 2001, Nicole wrote:
>
> ...
>> The problem is that when trying to scp a file or send a large file to it
>> via
>> sendmail, (large = 253952 <a copy of sendmail>) it seems to transmit along
>> happily, then (at least for scp) at abt 1/2 way through, it seems to just
>> start
>> crawling. When I have let it run, it will go forever and will seem to
>> eventually finish but will hang as the transfer speed keeps dropping through
>> the
>> floor.
> ...
>
> Mismatched duplex settings can cause problems like this. When using a
> switch, duplex settings on your server and switch must match. Most
> FreeBSD ethernet card drivers default to autonegotiation, but can be
> changed with an ifconfig option. Auto negotiation may not be trustworthy
> as it requires a good and recent switch, and a good and recent card. You
> should verify that autonegotiation actually picks the right duplex setting
> before trusting it with your hardware. Auto negotation requires that both
> the server and switch are set to auto. "auto negotation" is not the same
> as "auto detect".
>
> And hubs are always half-duplex.
>
> Tom
Yup.... Set to 100/TX via ifconfig -
Ifconfig -a shows:
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
media: 100baseTX status: active
supported media: autoselect 100baseTX <full-duplex> 100baseTX
10baseT/UTP <full-duplex> 10baseT/UTP
The switch is showing: 100Mbps/Half/BP-Off
As opposed to another server on the same switch, set to auto.
ifconfig -a
media: autoselect (100baseTX <full-duplex>) status: active
supported media: autoselect 100baseTX <full-duplex> 100baseTX
10baseT/UTP <full-duplex> 10baseT/UTP
The switch shows: 100Mbps/Full/Enabled (IEEE 802.3x)
Hmm Even if I force the switch to full duplex it does not seem to change the
server to full duplex when using autonegotiate via ifconfig.. What is the
right syntax to force full neg via ifconfig?
Nicole
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