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Re: [v6ops] I-D Action: draft-mawatari-v6ops-464xlat-00.txt

Masanobu Kawashima <kawashimam@vx.jp.nec.com> Tue, 24 January 2012 17:23 UTC

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To: Brian E Carpenter <brian.e.carpenter@gmail.com>
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From: Masanobu Kawashima <kawashimam@vx.jp.nec.com>
Date: Wed, 25 Jan 2012 02:21:20 +0900
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Cc: IPv6 Operations <v6ops@ietf.org>
Subject: Re: [v6ops] I-D Action: draft-mawatari-v6ops-464xlat-00.txt
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Hi Brian,

Thank you for your comment.

I take your point. However, a CLAT can only learn the address of an IPv6
DNS recursive server through DHCPv6 (or other way). The CLAT can not easily
discover the address of an IPv4 DNS recursive server, and it has to perform
all DNS resolution over IPv6.

The CLAT can pass this IPv6 address to downstream IPv6 hosts, but not to
downstream IPv4 hosts. As such, the CLAT should implement a DNS proxy.

Regards,
Masanobu


>> 7.4.  DNS Proxy Implementation
>> 
>>    If a router implement CLAT function, it performs DNS Proxy for IPv4
>>    hosts and IPv6 hosts in end-user network.  
>
>Why is this necessary? As far as I can see, the client could use any
>normal DNS server, because the A and AAAA records it needs are completely
>standard.
>
>Regards
>   Brian Carpenter
>
>_______________________________________________
>v6ops mailing list
>v6ops@ietf.org
>https://www.ietf.org/mailman/listinfo/v6ops

========================================
 NEC AccessTechnica, Ltd.               
 Product Development Department         
 Masanobu Kawashima                     
 kawashimam@vx.jp.nec.com               
 http://www.necat.co.jp/                
========================================

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