kmlhk79-ipv6@yahoo.com.hk wrote:
> Dear All:
>
> Since IPv6 is using the root DNS server in Ipv4 to
> search the DNS in the Internet.
>
> It means that the Ipv4 only client Host may get a host
> name resolved but with IPv6 address.
>
> Assume that it is a pure Ipv4 client host, and the
> Ipv6 Host only have IPv6 DNS record in the Ipv4 DNS
> server. ( i.e. No Ipv4 DNS reccord).
>
> The Ipv4 client host should got Host not find on that
> host domain Name .
>
> It will be a problem when transition Ipv4 network to
> Ipv6 network.
>
> Becasue we shall not want to keep the Ipv4 address
> mapping record in Ipv4 DNS server when we transition
> to Ipv6 network.
>
> However , do not keep DNS Ipv4 address mapping record
> in DNS server will disconnect all the current
> host/server visiting by the Ipv4 only client host form
> internet ( can not resolve DNS).
>
> This problem will post a strong resisit to transition
> form Ipv4 to Ipv6 .
>
> Are there any solution on this ?
>
> Any comment on this ?
As far as I know, current best practice is to dualstack your servers, so
that they have both ipv4 and ipv6 addresses on the interfaces and in the
dns. so they are reachable by both protocoll stacks. A dual stacked
client will connect by ipv6 because it has a higher priority, a ipv4
client by ipv4 and a ipv6 client by ipv6.
We practice this since 4years without any problems.
Best regards
Matthias Cramer
--
_;\_ Matthias Cramer System & Network Manager
/_. \ Dolphins Network Systems AG Phone +41 43 500 1111
|/ -\ .) Josefstrasse 225 Fax +41 44 271 3535
-'^`- \; CH-8005 Zuerich http://www.dolphins.ch/
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