On Tue, 9 Jul 2002, John Telford wrote: > I'm building routers. It's difficult to tell in advance which NIC will > be assigned eth0 and which will assigned eth1 when using two NICs. Ping > testing usually clears up this simple problem. > > The identification problem gets worse when adding a third NIC, after > sorting out the first two NICs. Frequently the eth0 or eth1 assignments > for the first two NICs change. > > Of course adding a fourth and fifth NIC multiplies the identification > problem. Yes, some of my routers are supporting five network segments. > > My question is, what's the algorithm for assigning Ethernet > designations? I know it not placement order in the PCI bus, and I know > its not the NIC data-link address. > > So what is it? Almost random. However, there's some evidence to suggest: order of probing of device drivers order of I/O addresses Unfortunately, in systems with identical cards that are configured using plug-and-play methods such as those used by PCI random is the best shot you have... Doei, Arthur. -- /\ / | arthurvl@sci.kun.nl | Work like you don't need the money /__\ / | A friend is someone with whom | Love like you have never been hurt / \/__ | you can dare to be yourself | Dance like there's nobody watching _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
