On Tue, 27 Aug 2002 14:43:38 -0400 Peter John Hill <peterjhill@cmu.edu> wrote:
On Tuesday, August 27, 2002, at 10:41 AM, Joe Baptista wrote:
Ipv6 uses 128 bits to provide addressing, routing and identification information on a computer. The 128-bits are divided into the left-64 and the right-64. Ipv6 uses the right 64 bits to store an IEEE defined global identifier (EUI64). This identifier is composed of company id value assigned to a manufacturer by the IEEE Registration Authority. The 64-bit identifier is a concatenation of the 24-bit company_id value and a 40-bit extension identifier assigned by the organization with that company_id assignment. The 48-bit MAC address of your network interface card is also used to make up the EUI64.
Since it so easy for a host (relative to ipv4) to have multiple ip addresses, I like what Microsoft has done. If told by a router, a Win XP box will assign itself a global unicast address using EUI-64. It will also create a global unicast anonymous address. This will not be tied to the hardware, and the OS will also limit how long it uses that
Wasn't this described in an Internet draft ? Do you know what the status is - I cannot seem to find it. Marshall
address before deprecating that address and creating a new preferred anonymous address. I can see servers using the EUI-64 address, while clients use the anonymous address. It will allow servers to narrow down who is accessing their servers to a 64 bit subnet. That will be good enough for most statistics, but will make it more difficult to do the scarier tracking of users.
I have noticed that the Linux and Mac OS X ipv6 implementations so not create the private addresses automatically. Peter Hill Network Engineer Carnegie Mellon University