Re: adding eth1
On Fri, Feb 28, 2003 at 09:06:03PM +0100, Ina&Frank wrote:
> Debian Folks
> I have a next question.
> I wandered through the manpages and internet for a few hours but can't
> seem to find a satisfactory answer for this one.
> I have an up and running IBM PC with Debian kernel 2.2.19 at the moment.
> It has one NIC (rtl8139) which works fine.
> I want to add a second identical card (eth1) but I am a bit confused how
> to configure it.
> Is modifying /etc/interfaces and /etc/ifstate sufficient? Where do I
> tell the system what IRQ to use. And does that have to be another IRQ as
> eth0? Or can they share it?
> Or do I have to compile a new kernel? Or is there a config tool for it,
> like gpmconfig for the mouse?
First, I have to mention that I hate rtl8139 cards :-) However, if it
works for you ...
Anyway, I'm guessing these are PCI cards, yes? If so, you don't need
to worry about IRQs. As someone pointed out recently, PCI NICs are
detected in PCI order (the order listed by lspci; the physical order
in the machine generally). This means that your present eth0 could
become eth1; write down the MAC of your existing interface before you
insert the new one.
You don't need a new driver or kernel since you've already got the
Once you start your computer, run
dmesg | grep '^eth'
You'll see something like this (I have Netgear FA-311s in this box):
eth0: NatSemi DP8381 at 0xc4825000, 00:02:e3:02:c7:45, IRQ 11.
eth1: NatSemi DP8381 at 0xc4827000, 00:02:e3:02:dc:be, IRQ 10.
eth2: NatSemi DP8381 at 0xc4829000, 00:02:e3:02:dc:ca, IRQ 9.
Look for the MAC address of your old eth0 to see which interface that
card is now assigned.
To assign an IP address to the card, edit /etc/networking/interfaces
and add a stanza for eth1. Further details available in interfaces(5)
(or on this list of course). Then just run
I have no idea what /etc/ifstate is, but I'm pretty sure you don't
need to edit it.
Nathan Norman - Incanus Networking mailto:firstname.lastname@example.org
A young man wrote to Mozart and said:
Q: "Herr Mozart, I am thinking of writing symphonies. Can you give me any
suggestions as to how to get started?"
A: "A symphony is a very complex musical form, perhaps you should begin with
some simple lieder and work your way up to a symphony."
Q: "But Herr Mozart, you were writing symphonies when you were 8 years old."
A: "But I never asked anybody how."