[coLinux-devel] MAC clarifications for bridged daemon

[Alejandro R. S. <as...@MI...>]

Since I've run into this problem with one user, I figure I'll mention it
here for reference.

A MAC address is not a set of random numbers. There is a ieee standard,
and some of the bits actually mean something.

The first two bits of the MAC address have very specific meanings. The
first bit specifies if the MAC refers to an individual or a group; set
it to 0. The second bit specifies if the MAC is globally administered or
not; this bit should technically be a 1.

so your MAC should technically start with one of:
?2, ?6, ?A, ?E

and can start with:
?0, ?4, ?8, ?C
though these would technically violate the ieee spec.

If you want to learn more about the MAC address format, ask your
favorite search engine.

-Alejandro