[NTLUG:Discuss] Which nic the gateway?

[Stephen Davidson]

HI Michael.

I have a script that I manually run (SuSE 10.0 on a Dell Latititude, but 
should give you some idea).  The script does the following;
1) 'Eject' the built in Wireless (there are some wireless networks in 
the vicinity that confuse things, and I have NOT figured out how to 
support multiple wireless secure and unsecured networks in Linux)
2) Restart the networks services (forces a cleanup of the network stack)
3) /etc/init.d/network down eth0 (shuts down the onboard NIC)

After that, everything normally runs happily through the Docking 
Station's NIC.

Regards,
Steve

Michael Barnes wrote:
> I've got a Dell laptop running SUSE 9.2.  It has a built-in NIC (eth0) 
> and a second NIC (eth1) in the docking station.  When I come into the 
> office and put it into the dock and fire it up, it pulls DHCP from the 
> server.  My problem is, when using the dock, DHCP assigns a static IP 
> address, but assigns the gateway as reachable via eth0.  Then I have to 
> go to command line and ifdown eth0, then ifup eth1 to re-pull DHCP and 
> set the gateway reached via eth1.  Once I do that, then all is happy 
> until I reboot.
>
> I cannot seem to find anything in the DHCP configuration which allows me 
> to specify a specific NIC to use, or anything in the laptop that lets me 
> turn off the laptop NIC when in the dock.
>
> Thanks for any ideas,
> Michael
>
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