27 Dec
2011
27 Dec
'11
11:38 p.m.
On Dec 27, 2011, at 4:28 PM, Glen Kent <glen.kent@gmail.com> wrote:
I had assumed that nodes derive their link local address from the Route Advertisements. They derive their least significant 64 bytes from their MACs and the most significant 64 from the prefix announced in the RAs.
No, link local addresses are not derived from RAs. Even a system not connected to a router will have a link local address on each ethernet (I couldn't tell you how link local works on PPP, ATM, etc, without looking it up - but it doesn't require /64 networks).