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 -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
