Forgot to mentioned DHCPv6 CONFIRMs are supported on my network.<br><br><div class="gmail_quote">On Fri, May 18, 2012 at 4:03 AM, Tore Anderson <span dir="ltr"><<a href="mailto:tore.anderson@redpill-linpro.com" target="_blank">tore.anderson@redpill-linpro.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">My cable provider just got included me in their IPv6 pilot. One of the<br>
first things I noticed when testing (using a computer directly attached<br>
to the cable modem) was that DHCPv6 Confirm messages went unanswered.<br>
The first time I connected went fast, while all subsequent connections<br>
(e.g. after resuming from suspend) was slow, as the Confirm request had<br>
to time out before information from the cached lease was used.<br>
<br>
I understood from my provider that the likely cause was that their Cisco<br>
CNR DHCPv6 server did not support DHCPv6 Confirm, and they also pointed<br>
me to the following UNH-IOL document, which says «Transmission of DHCPv6<br>
Confirm message is not expected on a DOCSIS WAN network»:<br>
<br>
<a href="https://www.iol.unh.edu/services/testing/ipv6/grouptest/white_papers/CPE_IPv6_Test_Event_Whitepaper.pdf" target="_blank">https://www.iol.unh.edu/services/testing/ipv6/grouptest/white_papers/CPE_IPv6_Test_Event_Whitepaper.pdf</a><br>
<br>
This strikes me as rather strange - as far as I can tell, the DHCPv6<br>
client has no way of determining if the Ethernet interface is running on<br>
is connected to a DOCSIS modem or something else, so I don't see how it<br>
could possibly selectively disable the use of Confirm in the case of DOCSIS.<br>
<br>
Does anyone have more information on why DHCPv6 Confirm wouldn't be<br>
expected and supported in DOCSIS networks? (Does it work in Comcast's<br>
network?)<br>
<span class="HOEnZb"><font color="#888888"><br>
--<br>
Tore Anderson<br>
Redpill Linpro AS - <a href="http://www.redpill-linpro.com" target="_blank">http://www.redpill-linpro.com</a><br>
</font></span></blockquote></div><br><br clear="all"><div><br></div>-- <br>===================================<br>John Jason Brzozowski<br>===================================<br>