lkml.org 
[lkml]   [1997]   [Nov]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Network Setup w/Digital DC21041 Tulip

Kaitlin R. Silver wrote:

> Okay, i'll start it off. I have a smc card that uses the dec 21041
> chipset. The w95 machine is just a intel etherexpress 16, all setup a-ok.

> The topography of my network is the easiest possible...
> LINUX MACHINE = 198.162.0.50
> WIN95 MACHINE = 198.162.0.100
>
> I dont have a hub, and I bought a good quality crossover cable.

> I start up my ifconfig w/..
> ifconfig eth0 198.162.0.50 pointopoint 198.162.0.100 up

Try

ifconfig eth0 198.162.0.50 netmask 255.255.255.0 broadcast 198.162.0.255 up

Ethernet is a broadcast protocol, not point to point, even if you do
only have two hosts. The IP layer may be able to figure out the right
settings itself, or then again it might not.

> So, I ran tcpdump -i eth0 and... viola.. I got these results
>
> root@dSC:~# tcpdump -i eth0
> tcpdump: listening on eth0
> 10:31:39.887117 arp who-has 198.162.0.100 tell 198.162.0.50

OK, so Linux knows that eth0 isn't really a point-to-point interface,
and issues ARP requests ...

> 10:31:44.883816 arp who-has 198.162.0.100 tell 198.162.0.50
> 10:31:49.883810 arp who-has 198.162.0.100 tell 198.162.0.50
> 10:31:54.883820 arp who-has 198.162.0.100 tell 198.162.0.50

... and is still asking 15 seconds later without having received a
reply.

> 10:32:35.596246 b5:0:2f:0:20:0 ad:0:11:0:26:0 ef00 60:
> 4300 5600 5400 2600 f000 7200 b300 9900
> fd00 ffff ffff ffff ffff ffff ffff ffff
> ffff ffff ffff ffff ffff ffff ffff

Don't know what this is offhand, but it's not ARP. You don't specify
the MAC addresses in use, so I don't know which way it's going either.
As it's nearly a minute since the original ARP request, it's probably
not related to it.

> 10:32:54.883821 arp who-has 198.162.0.100 tell 198.162.0.50

75 seconds later, and the Linux box is still issuing ARP requests.

> Which leads me to my final conclusion. What the heck is going on, and what
> is the next step to getting my mini-lan going here ;)

Your Windows box isn't answering the ARP requests. You don't know
whether or not it's receiving them in the first place, unless you can
get tcpdump or similar on the Windows box.

--
Glynn Clements <glynn@sensei.co.uk>

\
 
 \ /
  Last update: 2005-03-22 13:40    [W:0.269 / U:0.048 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site