[TriLUG] network cards

M. Mueller (bhu5nji) bhu5nji at yahoo.com
Fri Jan 25 13:27:24 EST 2002


eth<x> is the symbolic name assigned by the kernel to the Ethernet interface. 
With PCI, an interface that is eth0 in a singly homed machine can become eth1 
when a second interface is to the machine.  This effect is due to the order 
in which the cards are found during the boot up sequence.  Probes can run 
high to low, or low to high.  This is a software decision that may not be 
open for change - but it's worth a look-see in the BIOS.  You may want to try 
swapping the card positions in your machine to gauge the effect, for example, 
will card A become eth0 in a machine where it is 1 of 1 Ethernet IF and 1 of 
2 Ethernet IF?  Another approach is to accept the eth<x> names assigned to 
the cards by the system and then "ifconfig" them to match the appropriate net 
address for you network.

Mike M.


On Friday 25 January 2002 08:00 am, you wrote:
> I am having a bizzare problem - I have a netfinity-5100 with dual nic's
> - It has an on board (eth0) pcnet32 --- the second is in pci slot 1
> (eepro100) (eth1) ...  When the system boots up, eth0 expects, eepro100
> and eth1 exepect pcnet32 - so I bring it up in Single user mode, change
> the drivers and do an init 5 (all is well) -- if i try to reboot, then I
> start all over.  Has anyone any idea why the devices/software switch
> positions? Could it be the bios?
>
> tia,
> mark
>
>
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