Throw me a IPv6 bone (sort of was IPv6 ignorance)
aid at logic.org.uk
Mon Sep 24 20:11:12 UTC 2012
On 24 Sep 2012, at 17:57, Tore Anderson <tore.anderson at redpill-linpro.com> wrote:
> * Tore Anderson
>> I would pay very close attention to MAP/4RD.
> FYI, Mark Townsley had a great presentation about MAP at RIPE65 today,
> it's 35 minutes you won't regret spending:
Interesting video; thanks for posting the link.
This does seem a strange proposal though. My understanding from the video is that it is a technology to help not with the deployment of IPv6 but with the scarcity of IPv4 addresses. In summary; it simply allows a number of users (e.g. 1024) to share a single public IPv4 address.
My feeling is therefore, why are the IPv4 packets to/from the end user being either encapsulated or translated into IPv6 - why do they not simply remain as IPv4 packets?
If the data is kept as IPv4, this seems to come down to just two changes,
* The ISP's router to which the user connects being able to route packets on routes that go beyond the IP address and into the port number field of TCP/UDP.
* A CE router being instructed to constrain itself to using a limited set of ports on the WAN side in its NAT44 implementation.
Why all the IPv6 shenanigans complicating matters?
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