Re: newbie 2nd NIC config help request

Here is my thoughts on what is happening.  When you bring up eth1 via dhcp, it
gets a DNS server assigned.  This DNS server overrides whatever DNS is already
configured for the machine.  When you take eth1 offline and the DHCP lease is
dropped, this removes the DHCP assigned DNS and allows the normal DNS to take
over.  If you can configure your DHCP client not to pull DNS entries, it should
fix the problem.

Patrick M


--- Scott Christensen <[email protected]> wrote:
> To enable playing with this modem I installed a 2nd NIC into my Linux box.
> 
> eth0 is static connected to my 4-port DSL router. (192.168.2.17)
> eth1 is dhcp connected to Actiontec modem.       (192.168.0.4)
> 
> Got the 2nd NIC up and working, telnet to the modem ok (192.168.0.1), but 
> then DNS for the web quits working and I can no longer surf from the Linux 
> machine via eth0.
> 
> if I do:  ifconfig eth1 down
> 
> and wait for a while, then surfing works fine.
> 
> if I do: ifconfig eth1 up
> 
> I can no longer surf, however I can still ping web machines by manually 
> specifying x.x.x.x addresses.
> 
> ie.
> 
> ping mit.edu               blah blah - unknown host - blah blah
> ping 18.7.21.70          works fine
> 
> BTW, I did a route -n and see the default route is still on the 192.168.2.x 
> rail, which is how it should be.
> 
> This DNS thing is probably a very classic 2 NIC problem, and I appologize 
> for asking this group, but my searching HOWTO's for this solution has been a 
> little frustrating so far.
> 
> I thought perhaps some of you have your Linux box set up similar to this and 
> have gotten past this issue already?
> 
> BTW, not sure this matters but the 2nd NIC I installed is an old ISA Linksys 
> Ether16CT that was gathering dust in a junk drawer.
> 
> modprobe ne  io=0x300 irq=5
> 
> Seems to work fine other than messing up my DNS.  (I assume that DHCP from 
> the modem is hijacking it)
> 
> TIA.
> 
> _________________________________________________________________
> Get business advice and resources to improve your work life, from bCentral. 
> http://special.msn.com/bcentral/loudclear.armx
> 
> __
> ActionHack Mailing List - ActionHack-W7/[email protected]
> http://www.express.org/mailman/listinfo/actionhack
> http://www.embeddedlinuxinterfacing.com/wiki.php/ActiontecDualModem


__________________________________
Do you Yahoo!?
Yahoo! Search - Find what you’re looking for faster
http://search.yahoo.com
__
ActionHack Mailing List - ActionHack-W7/[email protected]
http://www.express.org/mailman/listinfo/actionhack
http://www.embeddedlinuxinterfacing.com/wiki.php/ActiontecDualModem