Aggregation for IPv4-compatible IPv6 address space
Hi all: With IPv4-compatible IPv6 address space, could I aggregate the address space? say 192.168.0.0/16 become ::192.168/112? or It must be converted to native IPv6 address space? Just wondering, Get the name you always wanted with the new y7mail email address. www.yahoo7.com.au/y7mail
in the most recent architecture, rfc 4291, that was deprecated. The exact statement is 2.5.5.1. IPv4-Compatible IPv6 Address The "IPv4-Compatible IPv6 address" was defined to assist in the IPv6 transition. The format of the "IPv4-Compatible IPv6 address" is as follows: | 80 bits | 16 | 32 bits | +--------------------------------------+--------------------------+ |0000..............................0000|0000| IPv4 address | +--------------------------------------+----+---------------------+ Note: The IPv4 address used in the "IPv4-Compatible IPv6 address" must be a globally-unique IPv4 unicast address. The "IPv4-Compatible IPv6 address" is now deprecated because the current IPv6 transition mechanisms no longer use these addresses. New or updated implementations are not required to support this address type. I should think you are within bounds to not announce it at all. On Feb 4, 2008, at 6:09 AM, snort bsd wrote:
Hi all:
With IPv4-compatible IPv6 address space, could I aggregate the address space?
say 192.168.0.0/16 become ::192.168/112? or It must be converted to native IPv6 address space?
Just wondering,
Get the name you always wanted with the new y7mail email address. www.yahoo7.com.au/y7mail
You mean do you have to express it in hex? The original spec allowed both ways I believe... but just so you realize, this has been deprecated. Mostly 'cause people can't subnet. :) Scott -----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of snort bsd Sent: Sunday, February 03, 2008 11:10 PM To: nanog@merit.edu Subject: Aggregation for IPv4-compatible IPv6 address space Hi all: With IPv4-compatible IPv6 address space, could I aggregate the address space? say 192.168.0.0/16 become ::192.168/112? or It must be converted to native IPv6 address space? Just wondering, Get the name you always wanted with the new y7mail email address. www.yahoo7.com.au/y7mail
On 4-Feb-2008, at 00:19, Scott Morris wrote:
You mean do you have to express it in hex?
There are two related things here: (a) the ability to represent a 32- bit word in an IPv6 address in the form of a dotted-quad, and (b) the legitimacy of an IPv6 address of the form ::A.B.C.D, where A.B.C.D is an IPv4 address. (a) is a question about the presentation of IPv6 addresses. (b) is a question about the construction of IPv6 addresses to be used in packet headers. I believe (a) is still allowed. However, (b) is not allowed. Since (b) is not allowed, (a) is arguably not very useful. Joe
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snort bsd