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DNS64 and NAT64

Hi,

Now i have created dns64 server and next step is nat64 on a router 2800(can support or not?)

I have a question on DNS64 in case of the website have only a record for example

Non-authoritative answer:

Name:    google.com

Addresses:  173.194.72.139

          173.194.72.100

          173.194.72.101

          173.194.72.138

          173.194.72.102

          173.194.72.113

>

Non-authoritative answer:

Name:    google.com

Addresses:  64:ff9b::adc2:4866

          64:ff9b::adc2:4864

          64:ff9b::adc2:4871

          64:ff9b::adc2:488a

          64:ff9b::adc2:488b

          64:ff9b::adc2:4865

- how to know the real destination ip version4 ?

- how to config on the router?

-Router cisco 2800 can support or not?

Thank you.

1 REPLY
Cisco Employee

DNS64 and NAT64

Manaschai,

1) The NAT64 translation function (stateful or stateless) is currently only supported on the Cisco ASR1k and CRS-1/3 platforms. I am not sure what the roadmap looks like for integrating NAT64 into the ISR family (likely to be ISR-G2) at this stage.

2) The destination IPv4 address is embedded into the synthesised AAAA record handed out by your DNS64 server.

64:ff9b::/96 looks to be your NAT64 prefix. The destination IPv4 address is embedded after that.

e.g. ad = 173, c2 = 194, 48 = 72, 64 = 100

3) Given you have an ISR router you cannot configure it. However have a read of the following white-paper which explains all the translation options and provides some sample configuration.

http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6553/white_paper_c11-676278.html

I hope this helps,

Stephan.

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