On Wed, Jul 10, 2002 at 08:18:18PM -0000, Binyon Steve Contr Det 4 AFC2TIG/ASRCC wrote: > John, > You will have problems with identical cards, where upon reboot there > is a chance that the assignment between eth1 and eth2 (or in your case eth1, > eth2, eth3, eth4...) will switch on you. It appears that eth(n) is a > logical assignment to the first card that is detected at boot time, and is > therefore independent on the MAC address of the card or what PCI slot that > the card is inserted into. I dont have a good answer for you, a few months > ago a similar question arose and really wasn't answered at that time either. > The question on what algrothim used is a good one.
On most routers I am using NICs with the same vendor part/model number. Interesting possibility. Fortunately I haven't experienced eth(n) assignments changing between reboot. My experience is adding another *may* change eth(n) assignments. > I'm looking at the source myself to figure it out. Read up on the > PnP stuff and see if this may lead to something else. Sorry no help, but > I'm currently looking into it. > Steve Binyon > > -----Original Message----- > From: John Telford [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, July 09, 2002 2:52 PM > To: redhat-list > Subject: which NIC is which > > > 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? > > Thanks ...John > -- > John Telford - Owner > JohnTelford.com LLC > 503-292-6865 - fax:503-292-3094 > [EMAIL PROTECTED] - www.johntelford.com > > > > _______________________________________________ > Redhat-list mailing list > [EMAIL PROTECTED] > https://listman.redhat.com/mailman/listinfo/redhat-list > > > > _______________________________________________ > Redhat-list mailing list > [EMAIL PROTECTED] > https://listman.redhat.com/mailman/listinfo/redhat-list > -- John Telford - Owner JohnTelford.com LLC 503-292-6865 - fax:503-292-3094 [EMAIL PROTECTED] - www.johntelford.com _______________________________________________ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
