Linux network adapter(s) give(s) "Destination network unreachble"

wzs · 02-06-2005, 02:05 PM

Hi guys!
Okay, I'm quite new to linux, but here's my problem:
I've got a Windows 2000 computer, a Windows XP computer, and this new RH9 networked. Or at least, that's what I'd like. The Windows computers all network fine, but the RH9 is intermittently networking.

The RH9 computer has a nForce 2 board, so at first I naturally tried to use the onboard ethernet. I downloaded the driver to a cd and installed it onto the RH9 box. after rebooting, it still failed to work. Whenever I would attempt to ping any computer, it said "Destination network unreachable."

Okay, I got pretty bored trying to solve that, so I put in a spare 3Com adapter I had lying around. RH detected it fine and let me set it right up. So now I had 2 ethernet adapters, eth0 being the nForce and eth1 being the 3Com. I used ifdown to shutdown the nForce and attached the network cable to the 3Com, which I did get a link light for both. Same message happened. I messed around with route for a while, and it worked! After a few reboots, I decided to try to get vgetty working. I installed drivers for my Dell MDP-3900 modem (they were conexant HCF drivers). But I didn't reboot. Then I did, the modem was detected, and the network was off again. My LAN is configured like this:

Router, uplinked to Cable Modem, DHCP-assigned wan address. Internal wan IP=192.168.2.1. Default GW. Internally, DHCP is disabled for 192.168.2.1.
Windows XP, IP=192.168.2.72, hostname=bob, default gw=192.168.2.1, pri dns=38.9.212.2
Windows 2000, IP=192.168.2.120, hostname=andrew, same settings as Win XP
new RH9, IP=192.168.2.152, hostname=linux, default gw=192.168.2.1, pri dns=38.9.212.2
Wireless Router, External IP=192.168.2.10, same external settings as XP, internal IP=192.168.1.1, DHCP active internally on this network

I should explain that my dns stopped working after the cable company upgraded, and the tech support people instructed me to change my dns server to 38.9.212.2. Is this bad practice? 192.168.2.1 never works anymore.
Right now, all Windows computer are working and my PocketPC accesses the internet fine from the Wireless Router.

Okay, now for the RH9 routing table:

Code:

 
Destination Gateway Genmask Flags Metric Ref Use Iface
default  andrew  255.255.255.0  UG  0  0  0  eth1
192.168.2.0  *  255.255.255.0  U  0  0  0  eth1
169.254.0.0  *  255.0.0.0  U  0  0  0  eth1
127.0.0.0  *  255.0.0.0  U  0  0  0  lo
default andrew  0.0.0.0  UG  0  0  0 eth1

Another interesting thing: the RH9 box is convinced that andrew resolves to 192.168.2.1. Last time I checked....nope, andrew => 192.168.2.120.
I'm quite stumped here. Any help would be appreciated!

Thanks,
Andrew