I have an Alphstation400 connected to a Win NT (Dell) machine. The
Alpha has an Etherworks 435 connected by a reverse-polarity 10BaseT
cable to a WindowsNT workstation (to save the cost of a hub -- this is
a small configuration that will grow sooner or later). The ethernet
controller on the Alpha is incapable of 100 Mb as far as I can tell. It
can still do full duplex, ARP and autodetect of simplex/duplex. When I
boot there are no device errors and the tu0 is recognized. lan_config
is used to override the defaults from SRM. It sets the device to 10Mb,
simplex, no ARP,
autoconfig simplex/duplex, and use UTP (10BaseT). There are no errors
from or lan_config or ifconfig if I use that as well. (The device has to
be jumpered for the UTP mode).
Ok now the device on the PC is fancier because it will run at 100Mb.
It's configured through a diagnostic program to autconfig speed and
duplex but I think ARP is hardwired. I have it set up to autoconfig
wherever possible and to not use ARP.
Now, since I don't have my domain and IP addresses assigned yet I use
127.3 for the Alpha and 127.2 for the PC. (the Alpha being
bigger/faster in principle).
Here's the kicker: I can ping the Alpha from the PC no matter how
sloppily I have set up the routes on the Alpha, or how screwed up they
get because the Alpha is sometimes PPP connected to my ISP and gets the
routes screwed up with the lan routes.
Even without PPP turned on the route is screwed up (see below). The
route at the PC
is: 127.1 (me) reaches 127.3 directly, a bit screwy but it works.
But no matter what I do to set up the route on the Alpha side, including
using the Netconfig app I can't get the Alpha to ping the PC. route
I've tried with host routing and net routing. With and without the
-interface qualifier, with the source address being 127.1 and 127.3 (the
true address of the Alpha) and even the PPP address.
I have tried omitting all of -net, -host and netmasks in all
combinations. I have tried using CIDR and netmask (191.255.255.0 which
works on the PC). But alas to no avail. I've also tried omitting the
optional elements like -host or -net in all
combinations.
None of this accomplishes a simple ping to to the PC. I can ping myself
using the lan
associated address (127.3) but that's it. I have even tried turning on
gated hoping it might discover the route after the PC does it's pinging
but that just confused things and I'm not ready for setting up the Alpha
as a gateway router yet. First I have to solve this.
So... Please. Any Tcp/IP or routing gurus out there. Help!
And yes I checked the jumpers. Twice.
Regards,
Avi
Received on Wed Nov 03 1999 - 05:10:11 NZDT