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HI Chun Sing,<br>
<br>
AFAIK, CGN works the same way as NAT on a CPE - it's just another
layer of NAT so applications that work over the CPE should just work
over CGN.<br>
<br>
Now, although operators may choose to go dual stack, subscribers
will still need a way to reach IPv4 sites so while they may have
global IPv6 connectivity, NAT44 may still be needed just to allow
these users to reach global IPv4 destinations (and they have to
deploy RFC1918 range for their subscribers since they cannot get
hold of enough public address blocks). The other way of doing it is
to perform NAT64, but not all applications work nicely over NAT64. <br>
<br>
HTH :) <br>
<br>
regards,<br>
Lim Fung<br>
<br>
<div class="moz-cite-prefix">On 25/07/2013 10:42, Kerk Chun Sing
wrote:<br>
</div>
<blockquote
cite="mid:CAOVxJdt3YdmMo7LUNASqQFgf6p0jagCft5+CsED7r9hA77Enug@mail.gmail.com"
type="cite">
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<p dir="ltr">In SG, one of the new ISP choose to do CGN in their
network. Maybe it is due to lack of operational v6 experience or
concern about the volume of clueless users flooding their
support line on day 1 of their business. </p>
<p dir="ltr"> VPN and Skype works on CGN, anyone know what
application will break? </p>
<p dir="ltr">/chunsing </p>
<div class="gmail_quote">在 2013-7-24 PM4:22，"Tom Paseka" <<a
moz-do-not-send="true" href="mailto:tom@cloudflare.com">tom@cloudflare.com</a>>
写道：<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi All<br>
<br>
<div class="gmail_quote">On Wed, Jul 24, 2013 at 1:21 AM, Kerk
Chun Sing <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:chunsing.kerk@sgix.sg" target="_blank">chunsing.kerk@sgix.sg</a>></span>
wrote:
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>Personally, with IP trading and recycling of v4
addresses, I felt that IPv6 adoption in Singapore will
stay low for the years to come.</div>
<div><br>
</div>
<div>Anyhow, do help APNIC to complete the survey if you
have the time.</div>
</div>
</blockquote>
<div><br>
</div>
<div>Don't just do the APNIC Survey, deploy IPv6 too! =)</div>
<div><br>
</div>
<div>-Tom</div>
</div>
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