<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:18pt"><div><div><span> Hi, Jordi !</span></div>
<div><br>
<span></span></div>
<div><span> Please, Receive my Best Wishes about the New Year 2012 !</span></div>
<div><br>
<span></span></div>
<div><span> FYA, Please Look Below...</span></div>
<div><br>
<span></span></div>
<div><br>
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<br>
Message: 6<br>
Date: Sat, 24 Dec 2011 11:02:35 +0530<br>
From: Glen Kent <<a href="mailto:glen.kent@gmail.com">glen.kent@gmail.com</a>><br>
To: <a href="mailto:nanog@nanog.org">nanog@nanog.org</a><br>
Subject: subnet prefix length > 64 breaks IPv6?<br>
Message-ID:<br>
<CAPLq3UPJqwrqeOJornSAEQjNa=<a href="mailto:b7BOB6r3XZWugHUGyLAsq9Wg@mail.gmail.com">b7BOB6r3XZWugHUGyLAsq9Wg@mail.gmail.com</a>><br>
Content-Type: text/plain; charset=ISO-8859-1<br>
<br>
Hi,<br>
<br>
I am trying to understand why standards say that "using a subnet<br>
prefix length other than a /64 will break many features of IPv6,<br>
including Neighbor Discovery (ND), Secure Neighbor Discovery (SEND)<br>
[RFC3971], .. " [reference RFC 5375]<br>
<br>
Or "A number of other features currently in development, or being<br>
proposed, also rely on /64 subnet prefixes."<br>
<br>
Is it because the 128 bits are divided into two 64 bit halves, where<br>
the latter identifies an Interface ID which is uniquely derived from<br>
the 48bit MAC address.<br>
<br>
I am not sure if this is the reason as this only applies to the link<br>
local IP address. One could still assign a global IPv6 address. So,<br>
why does basic IPv6 (ND process, etc) break if i use a netmask of say<br>
/120?<br>
<br>
I know that several operators use /120 as a /64 can be quite risky in<br>
terms of ND attacks. So, how does that work? I tried googling but<br>
couldnt find any references that explain how IPv6 breaks with using a<br>
netmask other than 64.<br>
<br>
Glen<br>
<br>
<br>
<br>
------------------------------</div>
<br></div><div></div><div><b><i><span style="font-size:16.0pt;"></span></i></b></div><div class="yiv1959699406MsoNormal" style="background:white;"><b style="color:rgb(0, 64, 127);"><i><span style="font-size:16pt;"><br> </span></i></b><font><font face="Times New<vbr> Roman"><b><i><span style="COLOR:#00407f;FONT-SIZE:16pt;"> Best Regards</span></i></b><b><i><span style="COLOR:#0000bf;FONT-SIZE:16pt;"> !<span style=""> </span></span></i></b></font></font><b><i><span style="color:#0000BF;"><span style="color:rgb(0, 64, 127);"></span><span style=""><span style=""> </span> </span><span style=""> </span></span></i></b><b><span
style="font-size:16.0pt;color:#0000BF;"></span></b></div><div class="yiv1959699406MsoNormal"><b><i><span style="font-size:10.0pt;font-family:Arial;"> </span></i></b></div><div style="MARGIN:0cm 0cm 0pt;" class="yiv1959699406MsoNormal"><font><font size="3"><font face="Times New Roman">************************</font></font></font></div><div><font size="1"><b><i><span style="COLOR:#999999;FONT-SIZE:10pt;"><font face="Times New Roman">Sylvain Baya</font></span></i></b></font><font size="1"></font></div><div style="MARGIN:0cm 0cm 0pt;BACKGROUND:white;" class="yiv1959699406MsoNormal"><font size="1"><b><i><span style="COLOR:#999999;FONT-SIZE:10pt;"><font face="Times New Roman"><span style=""> </span>CCNA</font></span></i></b></font></div><font size="1"></font><div style="MARGIN:0cm 0cm 0pt;BACKGROUND:white;" class="yiv1959699406MsoNormal"><font size="1"><b><i><span style="COLOR:#999999;FONT-SIZE:10pt;"><font face="Times New Roman"><span
style=""> </span>(+237) 77005341<span style=""> </span><br style=""></font></span></i></b></font></div><div><font size="1"></font></div><div style="MARGIN:0cm 0cm 0pt;" class="yiv1959699406MsoNormal"><font size="1"><b><i><span style="FONT-FAMILY:Arial;COLOR:#999999;FONT-SIZE:8pt;">BP 13107 YAOUNDE / CAMEROUN</span></i></b></font></div><div style="MARGIN:0cm 0cm 0pt;" class="yiv1959699406MsoNormal"><font><b><i><span style="BACKGROUND:white;COLOR:#999999;FONT-SIZE:10pt;"><a rel="nofollow" target="_blank" href="mailto:abscoco2001@yahoo.fr"><font face="Times New Roman">abscoco2001@yahoo.fr</font></a></span></i></b></font></div><div style="MARGIN:0cm 0cm 0pt;" class="yiv1959699406MsoNormal"><font><b><i><span style="COLOR:#999999;FONT-SIZE:10pt;"></span></i></b></font><font><font
size="3"><font face="Times New Roman">************************<br><br></font></font></font></div><div><span style="font-weight:bold;"></span><b><i><span style="font-size:16.0pt;color:#00407F;"></span></i></b><span style="font-weight:bold;"></span><b><i><span style="font-size:16.0pt;color:#00407F;"></span></i></b></div><div></div><br> <div style="font-family: times new roman, new york, times, serif; font-size: 18pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <font size="2" face="Arial"> <hr size="1"> <b><span style="font-weight:bold;">De :</span></b> JORDI PALET MARTINEZ <jordi.palet@consulintel.es><br> <b><span style="font-weight: bold;">À :</span></b> "ipv6cluster@ist-ipv6.org" <ipv6cluster@ist-ipv6.org> <br> <b><span style="font-weight: bold;">Envoyé le :</span></b> Lundi 26 Décembre 2011 8h06<br> <b><span style="font-weight: bold;">Objet :</span></b> [ipv6cluster] IPv6 news -
weekly summary {01}<br> </font> <br><div id="yiv1952655000">
<title>IPv6 news - weekly summary</title>
<div>
<font face="Verdana, Helvetica, Arial"><span style="font-size:12pt;"><b><br>
Main News:<br>
<br>
<br>
Other News:<br>
</b>Year in Review 2011: The stories that dominated the wireline industry<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8269">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8269</a>><br>
<br>
It’s Time to get Jiggy with Active DDI<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8268">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8268</a>><br>
<br>
New Internet protocol to undergo test<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8267">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8267</a>><br>
<br>
China to speed up development of next-generation Internet industry: Cabinet<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8263">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8263</a>><br>
<br>
IPv6 due for wide deployment in 2012, experts say<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8261">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8261</a>><br>
<br>
I Want IPv6 for Christmas - Part II<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8258">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8258</a>><br>
<br>
IP Address Space Covered by Certificates<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8257">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8257</a>><br>
<br>
Rising Cybercrime Pushes African Governments to Take Action<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8256">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8256</a>><br>
<br>
IPv6: Get ready for the transition…and avoid becoming obsolete<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8254">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8254</a>><br>
<br>
<br>
<b>Security:<br>
</b>Cyber threats in 2012: 5 pain points<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8266">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8266</a>><br>
<br>
<br>
<b>Corporate and Products:<br>
</b>2012: Year of warp speed, other innovations<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8265">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8265</a>><br>
<br>
2012 Predictions: Networking part two<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8264">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8264</a>><br>
<br>
D-Link Successfully Passes Second Round of IPv6 Interoperability Testing<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8262">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8262</a>><br>
<br>
The RTC Group Announces "Internet of Things" Keynote in Santa Clara January Conference<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8260">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8260</a>><br>
<br>
Stonesoft Firewall/VPN Receives VPN Consortium’s IPv6 IPsec Certification<br>
<<a rel="nofollow" target="_blank" href="http://www.ipv6tf.org/index.php?page=news/newsroom&id=8259">http://www.ipv6tf.org/index.php?page=news/newsroom&id=8259</a>><br>
<br>
<br>
<br>
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