Subject: Re: tlp won't do full duplex
To: None <firstname.lastname@example.org>
From: Brad Spencer <email@example.com>
Date: 07/02/2000 12:47:37
On Sun, Jul 02, 2000 at 11:02:13AM -0400, Andrew Gillham wrote:
> If you are taking your card out of autonegotiate mode, then the switch is
> not going to be able to figure out the duplex. Basically you just need to
> get a NIC that works correctly autonegotiating with your switch, or you
> are stuck at 100Mbit/s half-duplex. While a switch can figure out whether
> you are talking 10Mbit/s or 100Mbit/s at it (when your NIC is not doing
> NWAY), it has no way to know whether you can receive and transmit at the
> same time. I have a Netgear 4 port that has dipswitches that will let me
> force the port to full-duplex. My 8 port switch (Linksys DSS-8E?) doesn't
> have any such fancy stuff so I am forced to get cards that do NWAY right
> with NetBSD for the machines on that switch.
The problem though is that while the card and the switch _do_ happily
negotiate full duplex, as soon as ifconfig runs, the driver messes it up,
turning off full duplex, no matter what I specify. So the problem is not
with the card, but apparently with the driver. I gather then that what
you're telling me is that until tlp does NWAY, I'm out of luck. Is that
right? Is there some way I can tell/patch tlp to not mess with the
autonegotiated speed/duplex settings?
I use the tlp driver with a D-link quad 21143 card. Running with 1.4P, it
happly autoselects 100Mbits full-duplex when attached to a Linksys 5 port
switch. It also happly selects 10Mbits half-duplex when attached to a
normal hub. I'v never had to tell it anything about the speed or duplex.
I probably missed it, but what is being sent as arguments to ifconfig??
Brad Spencer - firstname.lastname@example.org http://anduin.eldar.org
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