Re: [Softwires] [BEHAVE] Some Thought about the Automatic Tunnel Address

[Iljitsch van Beijnum <iljitsch at muada.com>]

On 8 Sep 2009, at 6:17 , Xu Xiaohu wrote:

> What's the real purpose of the above model (IPv6 addresses beginning  
> with
> other than '000' use a 64-bit prefix)? Can somebody help explain it?

The IPv6 addresses in ::/3 are/were used for special purposes, such as  
the localhost address, IPv4-mapped addresses and mapping NSAPs and  
IPX. So the requirement that there should be a valid IID in those  
addresses doesn't make sense.