[lug] ppp and eth0

rm at fabula.de rm at fabula.de
Wed Apr 28 09:36:32 MDT 2004

On Wed, Apr 28, 2004 at 09:28:54AM -0600, Gary Hodges wrote:
> Do I need to bring eth0 down when making a ppp connection?  I've had a 
> student working on a task for me and he believes that eth0 needs to be 
> brought down before the ppp connection is established.  This doesn't 
> make sense to me, but it wouldn't be the first time he proved me wrong.
> Gray

The general answer (to a rather general question) is: no.
But things depend on your network setup and the way your distro
handles it.

Ethernet and ppp (most often on top of a serial line or ethernet ) don't 
directly interfere. Usually the script that starts/sets up the ppp 
interface takes care of setting the correct routes (usually one uses
ppp to connect to the internet and hence these scripts set the default
route to use the ppp interface. If you need ppp to connect to a specific
net and still need your default route via ethernet you need to tweak
the scripts).

I might be able to help more if you can provide a bit more information.

 HTH Ralf Mattes

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