On 12/10/2016 14:32, Alvaro Herrera wrote:
> Julien Rouhaud wrote:
>> and you can instead make macaddr64 support both format, and provide a
>> macaddr::macaddr64 cast
> Having macaddr64 support both formats sounds nice, but how does it work?
> Will we have to reserve one additional bit to select the representation?
> That would make the type be 65 bits which is a clear loser IMO.
> Is it allowed to just leave 16 bits as zeroes which would indicate that
> the address is EUI48?  I wouldn't think so ...

>From what I read, you can indicate it's an EUI-48 address by storing
FF:FF (or FF:FE for MAC-48) in 4th and 5th bytes of the EUI-64 address.

Julien Rouhaud
http://dalibo.com - http://dalibo.org

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