NIC Selection

jludwig wralphie at comcast.net
Fri Apr 30 17:50:15 UTC 2004


On Fri, 2004-04-30 at 12:19, bryan at redfedora.co.uk wrote:
> > Ok, then lets assume that eth0 has the lowest ip.  Does that mean that
> > eth1 would never be used?
> >
> >
> > >
> > > Given that you did not have created any specific routes for each device
> > > or created iptables source routing, then the kernel chooses the card
> > > with the lowest IP.
> 
> I always thought it dished out eth0 eth1 and so on with the PCI slot it was
> plugged into. The higher up in the slots it was the lower the number. I have
> to admit I've not checked too carefully before but it stuck in me nog that
> that was how it worked.
> 
> Bry
Not only Will it use the lowest IP, but if two cards are on the same
physical net it does the same act.  I know -- having this happen testing
hubs and switches. 
jludwig <wralphie at comcast.net>





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