Re: 3c515 issue

On Tue, 1 Oct 2002, Kris Van Hees wrote:

> On Tue, Oct 01, 2002 at 02:37:40AM -0400, Donald Becker wrote:
> > On Mon, 30 Sep 2002, Kris Van Hees wrote:
> > > On top of this, an ftp between the router and another host on the switch (known
> > > to be using 100BaseTX) runs at about 1262.3 kB/s whereas a transfer between
> > > two hosts on the switch that are known to be using 100BaseTX, the transfer rate
> > > is 10706.9 kB/s.
> > 
> > Uhmmm, this is a card on the ISA bus.  At best you will get 5.33MB/sec,
> > and that is with 100% of the CPU time waiting for the ISA bus and no
> > dropped packets.
> 
> Hah!  So much for the 3Com web page that states that you should be able to
> make 20-25Mb/s.

Mb is Megabit
MB is Megabyte

25Mb/sec is about 3MB/sec

> > > Finally, an ifconfig reports that basically every transmitted packet has a
> > > carrier error associated with it:
> > 
> > This is a bug in the driver -- the negotiated full duplex setting isn't
> > being correctly set in the NIC.  I would help, but that's a modified
> > driver.  You should ask the last person to modify it for support.
> 
> Hm, I shuld have realized that from using the driver in the 2.4.19 kernel.
> Unfortunately, the Scyld driver at ftp://ftp.scyld.com/pub/network/isa/3c515.c
> does not compile with the 2.4.19 kernel.  Here is what I get:

Yes, that is correct.
There is a cost to the users that results from the political
machinations a few years ago that resulted in my drivers updates being
rejected, and other people's bogus changes being accepted instead.


-- 
Donald Becker				[email protected]
Scyld Computing Corporation		http://www.scyld.com
410 Severn Ave. Suite 210		Second Generation Beowulf Clusters
Annapolis MD 21403			410-990-9993