Subject: Re: Weird TCP/IP behaviour
To: Paul Mather <firstname.lastname@example.org>
From: Manuel Bouyer <email@example.com>
Date: 11/26/2001 23:21:14
On Mon, Nov 26, 2001 at 05:00:14PM -0500, Paul Mather wrote:
> The lance ethernet driver:
> NetBSD 1.5Y (CHUMBY) #2: Wed Nov 21 11:44:53 EST 2001
> DEC 3000 - M300LX, 125MHz, s/n
> 8192 byte page size, 1 processor.
> total memory = 112 MB
> ioasic0 at tc0 slot 5 offset 0x0: slow mode
> le0 at ioasic0 offset 0xc0000: address 08:00:2b:3d:d7:b8
> le0: 32 receive buffers, 8 transmit buffers
> => Does netstat -i show errors on the interface ?
> No errors.
> Name Mtu Network Address Ipkts Ierrs Opkts
> Oerrs Colls
> le0 1500 <Link> 08:00:2b:3d:d7:b8 6075433 0 8829331
> 0 4521
> Actually, I think I just solved the problem. I noticed that one of the
> differences between my 1.5 DEC3000/300 and 1.4 DECstation 5000/240 is
> that net.inet.tcp.cwm is set to 1 on the former and 0 on the latter.
> When I set net.inet.tcp.cwm to 0 on the NetBSD 1.5 box, the problem went
> away. When I set it to 1, FTP speeds went straight down to ~7 KB/sec
> when sending from the 1.5 machine to another subnet.
> I guess net.inet.tcp.cwm defaults to 1 nowadays.
Can you send-pr this ? This is certainly not the intended behavior ...
Manuel Bouyer <firstname.lastname@example.org>