Messages in this thread | | | Date | Tue, 6 Aug 2002 13:04:43 -0700 (PDT) | From | "Randy.Dunlap" <> | Subject | Re: ethtool documentation |
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On Tue, 6 Aug 2002, Richard B. Johnson wrote:
| On Tue, 6 Aug 2002, Chris Friesen wrote: | | > "Richard B. Johnson" wrote: | > | > > Because of this, there is no such thing as 'unused eeprom space' in | > > the Ethernet Controllers. Be careful about putting this weapon in | > > the hands of the 'public'. All you need is for one Linux Machine | > > on a LAN to end up with the same IEEE Station Address as another | > > on that LAN and connectivity to everything on that segment will | > > stop. You do this once at an important site and Linux will get a | > > very black eye. | > | > Can't we already tell cards (some of them anyway) what MAC address to use when | > sending packets? This doesn't overwrite the EEPROM, but it does last for that | > session... | > | > Chris | | Sure you can. And it was assumed that the MAC address provided by | the manufacturer would always be used by the software for the MAC | address on the wire. However, 'software engineers' have decided
Assumed by whom? IEEE allows locally administered addresses, and most NIC mfrs that I know of support/allow them.
| that they don't have to follow the rules, so they provide hooks | so you can use a MAC address of anything. They even call it | "Local Administration...", which decoded means; "Screw the | committee".
<snippage>
-- ~Randy
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