* Gert Doering > Does one of you have a pointer for me what Windows 7 is using here? Some > sort of "windows installation global identifier"? Hi Gert, I believe this is due to Windows 7 is using privacy extensions with SLAAC by default (RFC 4941). Best regards, -- Tore Anderson Redpill Linpro AS - http://www.redpill-linpro.com/ Tel: +47 21 54 41 27