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<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>Narelle<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>The TCP sessions for normal day application like
Google maps or iTunes etc. is quite substantial. There is a limitation of
number of sessions than can pass through the NAT, which is again hardware
dependent.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>Having carrier grade NAT will be very hardware intensive
and eventually requires substantial capex, which begs a question if it is
rather better for carriers and ISPs to look at migration plans to IPv6 than
delaying the eventual.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Regards<o:p></o:p></span></font></p>
<p class=MsoNormal><b><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy;font-weight:bold'>Ankur
Puri<o:p></o:p></span></font></b></p>
<p class=MsoNormal><b><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy;font-weight:bold'>NTT
Australia Pty Ltd<o:p></o:p></span></font></b></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:navy'>P: +61 2 8915 8948 </span></font><b><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy;font-weight:bold'>|</span></font></b><font size=1 color=navy
face=Arial><span style='font-size:9.0pt;font-family:Arial;color:navy'> F: +61 2
9251 5749 </span></font><b><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy;font-weight:bold'>|</span></font></b><font
size=1 color=navy face=Arial><span style='font-size:9.0pt;font-family:Arial;
color:navy'> M: +61 433 114 275</span></font><b><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy;
font-weight:bold'><o:p></o:p></span></font></b></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:navy'>W: <a href="http://www.au.ntt.com">www.au.ntt.com</a>
</span></font><b><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy;font-weight:bold'>|</span></font></b><font
size=1 color=navy face=Arial><span style='font-size:9.0pt;font-family:Arial;
color:navy'> Global IP Network (GIN): <a href="http://www.ntt.net/english">www.ntt.net</a><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt'>-----Original Message-----<br>
From: ausnog-bounces@lists.ausnog.net [mailto:ausnog-bounces@lists.ausnog.net] On
Behalf Of Narelle<br>
Sent: Wednesday, 19 May 2010 10:40 PM<br>
To: Mark Newton<br>
Cc: ausnog@ausnog.net<br>
Subject: Re: [AusNOG] SMH: "No room at the internet"</span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>On Wed, May 19, 2010 at 9:11 PM, Mark Newton
<newton@internode.com.au> wrote:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>> The NATs are going to be really atrocious, by the
way. The IPv4 Internet<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>> will carry increasingly massive quantities of
suck.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>One thing that opened my eyes was a talk a few years
back from an NTT<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>guy who'd done some measurements on TCP flows. They
measured the<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>number of flows from a host in a few cases: sitting
there, running a<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>few standard apps, running google maps, running
itunes, and found a<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>huge variation, ie from 7 - hundreds.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>Logically, this means in a "carrier grade
NAT" you'd have to start<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>applying port restrictions in order to make sure
everyone got 'fair<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>access', and they made a range of estimates based on
typical buffer<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>sizes etc. Then retested the clients with
restrictions, ie 5, 10, 50,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>200... with proportionately less of the individual web
pages and<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>applications actually working... it was really
instructive to see<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>google maps not get all those tiles needed to be
useful.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>I was reminded of this recently when someone posted a
request for<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>recommendations on proxies - due to P2P users
squeezing out all the<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>other conference attendees when they had stolen all
the available port<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>mappings. Take a look at the future...<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>-- <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>Narelle<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>narellec@gmail.com<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>_______________________________________________<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>AusNOG mailing list<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>AusNOG@lists.ausnog.net<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=navy face=Arial><span
style='font-size:10.0pt'>http://lists.ausnog.net/mailman/listinfo/ausnog<o:p></o:p></span></font></p>
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