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NAT64 and DNS64 in 30 minutes

During last week’s 3rd Slovenian IPv6 summit (program description in English-resembling form) I had a short presentation on IPv6-related NAT topics. The initial idea was to cover only the technical details of NAT64/DNS64, but as nobody jumped at the opportunity to explain the differences between various NAT-based solutions to the audience, I decided to switch back to my default “big picture” perspective and describe the need for NAT, various NAT-like solutions and as many details about NAT64/DNS64 as my 30-minute slot permitted. Luckily, one of the other presenters was AWOL, so my slot got extended.

For more information on IPv6 in Service Provider and Enterprise networks, check out my webinars and workshops: Market Trends in Service Provider Networks, Building IPv6 Service Provider Core and Enterprise IPv6 deployment.

You can view the NAT64 and DNS64 in 30 minutes presentation on Slideshare or (if you find a real-time spoken-language translator from Slovenian to English) watch my presentation (it starts @ 0:02:00).


  1. Nice presentation, I made one about NAT64 at PLNOG conference in March in Poland. But why you haven't mentioned anything about performance of NAT64 and readiness of Cisco devices to handle NAT64? IMO it's good that we have an option of IPv6-to-IPv4 translations but performance of this solution is really poor, or at least not acceptable for SP and Enterprise customers.
  2. There is no NAT64 in Cisco IOS (yet). What we have is NAT-PT and its performance stinks because it has to be process-switched at the moment (and because it tries to solve too many problems).

    But still, a dedicated 2800-XM is able to push 8 Mbps through NAT-PT. Not bad, considering the amount of IPv6 traffic we see on the Internet.

    Pure NAT64 is coming to IOS XR and IOS XE within the CGv6 framework ... supposedly in CY 2010.
  3. Very interesting presentation.
    It permit to well understand what is utility of NAT64 and how it will work.
  4. Good presentation but as you are aware since IPv6 roots were almost in the ISO's realm and almost casted as decnet v5 one thing to keep in mind.

    IP was around in 1980 and we didn't really touch it until 1995 on a significant level. So did we blow 15 years for IP? Not really different environments then but by the time 1995 rolled around IP was already "old" granted other protocols came along in the 90s but that is the consideration when v6 is discussed and some folks state hey its been 12 years(since 1999) and its old..
    Heck we almost had SIPP or TUBA. Thank god for the IETF!!!!!

    with all the ISIS TRILL Fabric type discussions about a non SPT L2 multipath environment would we have been better off if the ISO had won out and took full ownership of IPv6 and integreated into CLNS.
  5. You know what ... I've been there and did some TUBA EFT.
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