Subject: Re: DECchip 21143 and the tlp driver.
To: None <firstname.lastname@example.org>
From: Wolfgang Rupprecht <email@example.com>
Date: 10/29/1999 10:08:40
firstname.lastname@example.org (Brad Spencer) writes:
> > 2) Falling back on the de driver... I have a 10/100 ethernet switch that
> > can do full duplex and the auto probe finds that it is connected to a
> > 100Mbits full duplex port, as expected. However, it appears that an
> > output error is generated [or at least recorded] for every every packet
> > sent down the wire. Slightly annoying, but I don't know if this is
> > significant.
> What swicth do you have ?
> I have a cisco 10/100 switch I don't have this behavior under 1.4.x.
> Maybe your board and switch dissagree on the half/full duplex settings ?
> The switch is a Linksys 5 port. I also have an 8 port down the hall in
> the closet.
When I had an early SMC etherpower card that didn't autonegotiate I
found that I could never get it to switch media correctly without the
interface being down for a while before and after the media change.
# de1 comes up 10BaseT
ifconfig de1 down
ifconfig de1 media 100BaseTX
sleep 1 # this is crucial
ifconfig de1 up
BTW my D-link 4-port DFE-570TX comes up ok so I never had to force the
media to upshift. I do see the fifo heuristics being changed if I
really beat on the PCI bus. This will only happen to me if I tar(1)
on an NFS-mounted system. The combination of hot-n-heavy disk I/O and
network I/O appears to starve the PCI bus. I do make sure I put my
ethernet card in the slot closest to the CPU, which I am told on my
intel al440lx board gives it a higher priority. That might be why I
don't see it more often.
Wolfgang Rupprecht <email@example.com>
DGPS signals via the Internet http://www.wsrcc.com/wolfgang/gps/dgps-ip.html