confused about MAC address generation

Hi all

I'm a bit confused about a tutorial found at the ieee site.

I.e. 3com got the OUI assigned by ieee of 00-50-04 (hex) If I dump networktraffic from a system that is having such a 3com nic installed I find in the dump what I would expect namely 00-50-40-xx-xx-xx as the machines MAC address. Now, the confusing part actually comes from the following document:

formatting link

According to this document the OUI AC-DE-48 would have a binary representation of


where 'C' would contain the last significant bit but would be transmitted first??

Is it true that the bits of a byte on ethernet are transfered in "non network" order or do I miss something? If this is true, all is well in that a dump of above example OUI in fact would result in AC-DE-48-xx-xx-xx and not in CA-ED-84 but I think they better should take that "tutorial" off line or else point this out more clearly - no? Any comments welcome.



Reply to
Markus Zingg
Loading thread data ...

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.