Ipv6 DNS and ipv4 host - Tranistion problem
Dear Mattias :
Yes, I understand Dual stack will be one of the
alternative . Debian Sarge already come with dual
stack support.
But in the network administration point of view,if you
are going to transit to Ipv6, you will not want to
keep dual stack running in your network.
Running dual stack , it will :
1. Increase administration work load. I will said
triple effort.
2. Difficult to deal with Security problem on dual
Stack network.
3. The most problem , it increases cost to maintain
both network. Your Boss will shoot you.
A quick question will come to you from your Boss, Why
running Ipv6 if I still need to pay for maintain Ipv4
network.
Therefore dual stack is not the solution for
transition.
It is only a easiest way to maintain compatibility
with IPv4, because you are never transition to Ipv6.
My Transition means Ipv4 network can be cut off in
some date. In short, only one network ,one protocol,
one standard after transition.
That is why I am asking for any solution and test
proposal in the world.
How about running 6 to 4 or 4 to 6 tunnel or playing
magic with in the DNS server with ipv4 / Ipv6 gateway
?
e.g. Ipv4 Internet ---> DNS server ---- > Gateway
-- > Ipv6 internet
Any comments to share with ?
K. M. Lau
--- Matthias Cramer <cramer@dolphins.ch> 說：
> 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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