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Why NAT64 must win. Andy Davidson 27 th Septeber 2012...
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Transcript of Why NAT64 must win. Andy Davidson 27 th Septeber 2012...
![Page 1: Why NAT64 must win. Andy Davidson 27 th Septeber 2012 ______________________________________________________ CTO, 2Connect UK. RIPE65, Amsterdam andy@2connectintl.com.](https://reader035.fdocuments.us/reader035/viewer/2022070306/55162546550346c6758b48e7/html5/thumbnails/1.jpg)
Why NAT64 must win.
Andy Davidson 27 th Septeber 2012
______________________________________________________CTO, 2Connect UK .
RIPE65, Amsterdam [email protected]
The Long Term View.
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Transitional Technology
Technology to facilitate transitioning of the internet from its initial and current infrastructure to the
successor addressing and routing system of IPv6.
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Transitional Technology
“Crappy little hacks” that add a new cost burden to ISPs, hurt the end user’s experience, and disrupt the
pace of innovation at content producers.
Necessary
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Necessary Features
Sidestep NAT when v6
Turn it off!
A step to native v6
Enormous scale
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Turn it off!
This point is key. If we can’t turn off the NAT one day, it becomes a new cost of doing
business. Transition = temporary.
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NAT44 – does it pass the test?
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NAT 444444444
Buy now, pay later. And later. And later. Is this your vendor’s preferred solution?
Not transitional.
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Amazingly, this technology has traction – but even if it could work for access ISPs,
what will hosting companies do?
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Worst of all…..
The only possible outcome is more NAT, more boxes, more COST….
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DS-Lite – does it pass the test?
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DS-LiteIPv4 Tunnel
IPv6 Native
DualContent
DS-Lite is non-deterministic.Where will dual-stack content be routed?Are you sure? Always?
NAT
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This is where you always wantrequests from dual-stacked users to go…
…. In order to avoid the request traversing your NAT
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IPv4 IPv6
See GeoffTV, RIPE64
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So even when content upgrades…..
A very likely outcome is more NAT, more boxes, more COST….
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6rd – does it pass the test?
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CPE
ISPV4 only
IPv4
IPv66rd gw
Here, the isp has to do extra work, but only for IPv6. What happens when IPv6 traffic
grows ?
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CPE
ISPV4 only
IPv4
IPv66rd gw
Does this seem counter-intuitive to anyone in the room ?
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The best possible outcome is.…..
Loads and loads of 6rd relays(and complexity, and COST)
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MAP
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IPv4
A+P-like
Encap V6
V6 native
Decap v6
IPv4
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Better, but..
Does not address exhaustion
Pointless without dual stack
Risk that you still need more boxes
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Why is this so hard?
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NAT64 – does it pass the test?
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CPEV6 only
ISP
IPv4
IPv6
NAT64 gw
Here the ISP has to translate IPv4 traffic.It’s growing today, but what about in the future? Where do we want to end up?
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CPEV6 only
ISP
IPv4
IPv6
NAT64 gw
Nasty performance flashpoint
No nasty performance flashpoint… incentive to support IPv6 on content hosts!
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A genuine step towards native IPv6.
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The best possible outcome is.…..
In time, the NAT64 estate can bereduced or even turned off!
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But.... The breakages
IP Literals
End to end v4 apps
V4 only hosts
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Does this mean all transitionaltech is flawed?
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No, it means that weget the internet we deserve
Where do we want to be?
Provide incentive for dual-stack content/apps
Attempt to upgrade end users