On 03/20/2016 09:45 AM, Andrei Borzenkov wrote:
20.03.2016 16:43, James Knott пишет:
Also, I find that locally administered MAC address puzzling. It is not MAC, it is IPv6 address. At the end it can contain anything, nowhere is it mandated that it must be valid MAC.
No, if it's a MAC address it's supposed to follow certain rules, including setting the 7th bit to one for locally managed MACs. When the MAC is used to to form an IPv6 link local address, that 7th bit will be inverted, which is why I pointed out 8c vs 8e earlier. While it's certainly possible to create a link local address by other means, the address Carlos provided included fffe in the middle of the MAC portion, which indicates the link local address was created from the MAC and not by other means. That fffe is not supposed to be used for any other purpose. I just took a look at the IPv6 addresses for my computer. It has one link local address and one unicast address, both based on the MAC address and with fffe inserted and with MAC bit 7 inverted, along with several random number based unicast addresses, without fffe inserted. Those random number addresses are generated periodically, with older ones eventually falling off the list. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org