second ethernet

Jeff Vian jvian10 at
Wed Dec 14 02:33:45 UTC 2005

On Tue, 2005-12-13 at 17:43 -0800, jdow wrote:
> From: "Jeffrey Ross" <jeff at>
> > I'm looking to add a second Ethernet interface to my FC3 system.  The 
> > interface is going to be used strictly as a capture interface for 
> > ethereal and as such has no need for an IP address..
> > 
> > The questions are:
> > 
> > 1) How do I force the existing Ethernet interface (built onto the 
> > motherboard), which shows up as a via-rhine to remain as eth0 and the 
> > new interface which will be an Intel card as eth1
> If the new card is not Via Rhine it's very easy. This is what I have
> in my /etc/modprobe.conf file as the first two lines. (The last is
> coincidence not requirement.)
> alias eth0 via-rhine
> alias eth1 8139too
> If both somehow end up as via-rhine you need to use some other means of
> distinguishing the cards. "lspci" can give you some features you may
> be able to use in modprobe.conf to distinguish the cards. Of course,
> "man modprob.conf" is rather a good idea.
> > 2) enable the card without any addressing (IP or otherwise) so the card 
> > remains silent?
> That, too is easy. Don't assign it an IP address. If you use dhclient
> this may be a tad awkward. A good read on the dhcp client documentation
> is a rather good idea.
> > 3) will this process work for adding multiple additional interfaces, and 
> > is there a limit to network interfaces besides physical space for cards?
> So far as I know you can keep going as far as you want. The problem
> becomes generating a distinguishing feature for the cards.

Even if otherwise identical all cards have one unique attribute.  the
MAC address.

More information about the fedora-list mailing list