<div dir="ltr"><div class="gmail_default" style="font-size:small">Comcast recently lit up IPv6 native dual stack in the Boston area.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">
The <a href="http://test-ipv6.com/">http://test-ipv6.com/</a> web site complains about DNS problems unless dnssec is disabled; if it is, I get various timeouts.</div><div class="gmail_default" style="font-size:small"><br>
</div><div class="gmail_default" style="font-size:small"><table cellpadding="3" border="0" summary="tests run, and pass/fail" style="color:rgb(0,0,0);font-family:sans-serif;font-size:medium"><tbody><tr><td nowrap style="vertical-align:top">
Test with IPv4 DNS record</td><td nowrap style="vertical-align:top"> </td><td nowrap style="vertical-align:top"><div id="sum_test_a" style="width:265px;margin-left:auto;margin-right:auto;border:0px solid rgb(0,0,0)"><span class="" style="font-weight:bold;color:green">ok</span> (4.196s)</div>
</td></tr><tr><td nowrap style="vertical-align:top">Test with IPv6 DNS record</td><td nowrap style="vertical-align:top"> </td><td nowrap style="vertical-align:top"><div id="sum_test_aaaa" style="width:265px;margin-left:auto;margin-right:auto;border:0px solid rgb(0,0,0)">
<span class="" style="font-weight:bold;color:green">ok</span> (0.115s) using ipv6</div></td></tr><tr><td nowrap style="vertical-align:top">Test with Dual Stack DNS record</td><td nowrap style="vertical-align:top"> </td><td nowrap style="vertical-align:top">
<div id="sum_test_ds" style="width:265px;margin-left:auto;margin-right:auto;border:0px solid rgb(0,0,0)"><span class="" style="font-weight:bold;color:red">timeout</span> (11.882s)</div></td></tr><tr><td nowrap style="vertical-align:top">
Test for Dual Stack DNS and large packet</td><td nowrap style="vertical-align:top"> </td><td nowrap style="vertical-align:top"><div id="sum_test_dsmtu" style="width:265px;margin-left:auto;margin-right:auto;border:0px solid rgb(0,0,0)">
<span class="" style="font-weight:bold;color:red">timeout</span> (11.817s)</div></td></tr><tr><td nowrap style="vertical-align:top">Test IPv4 without DNS</td><td nowrap style="vertical-align:top"> </td><td nowrap style="vertical-align:top">
<div id="sum_test_ipv4" style="width:265px;margin-left:auto;margin-right:auto;border:0px solid rgb(0,0,0)"><span class="" style="font-weight:bold;color:green">ok</span> (0.214s) using ipv4</div></td></tr><tr><td nowrap style="vertical-align:top">
Test IPv6 without DNS</td><td nowrap style="vertical-align:top"> </td><td nowrap style="vertical-align:top"><div id="sum_test_ipv6" style="width:265px;margin-left:auto;margin-right:auto;border:0px solid rgb(0,0,0)"><span class="" style="font-weight:bold;color:green">ok</span> (0.204s) using ipv6</div>
</td></tr><tr><td nowrap style="vertical-align:top">Test IPv6 large packet</td><td nowrap style="vertical-align:top"> </td><td nowrap style="vertical-align:top"><div id="sum_test_v6mtu" style="width:265px;margin-left:auto;margin-right:auto;border:0px solid rgb(0,0,0)">
<span class="" style="font-weight:bold;color:green">ok</span> (0.120s) using ipv6</div></td></tr><tr><td nowrap style="vertical-align:top">Test if your ISP's DNS server uses IPv6</td><td nowrap style="vertical-align:top">
</td><td nowrap style="vertical-align:top"><div id="sum_test_v6ns" style="width:265px;margin-left:auto;margin-right:auto;border:0px solid rgb(0,0,0)"><span class="" style="font-weight:bold;color:orange">slow</span> (8.752s)</div>
</td></tr><tr><td nowrap style="vertical-align:top">Find IPv4 Service Provider</td><td nowrap style="vertical-align:top"> </td><td nowrap style="vertical-align:top"><div id="sum_test_asn4" style="width:265px;margin-left:auto;margin-right:auto;border:0px solid rgb(0,0,0)">
<span class="" style="font-weight:bold;color:red">timeout</span> (11.968s)</div></td></tr><tr><td nowrap style="vertical-align:top">Find IPv6 Service Provider</td><td nowrap style="vertical-align:top"> </td><td nowrap style="vertical-align:top">
<div id="sum_test_asn6" style="width:265px;margin-left:auto;margin-right:auto;border:0px solid rgb(0,0,0)"><span class="" style="font-weight:bold;color:green">ok</span> (0.126s) using ipv6 ASN 7922</div></td></tr><tr class="">
<td nowrap style="vertical-align:top">Test for buggy DNS</td><td nowrap style="vertical-align:top"> </td><td nowrap style="vertical-align:top"><div id="sum_test_buggydns1" style="width:265px;margin-left:auto;margin-right:auto;border:0px solid rgb(0,0,0)">
<span class="" style="font-weight:bold;color:green">undefined</span> (5.003s)</div><div><br></div></td></tr></tbody></table></div><div class="gmail_default" style="font-size:small">DNS server addresses look reasonable for Comcast.</div>
<div class="gmail_default"><div class="gmail_default">DNS 1: 75.75.75.75</div><div class="gmail_default">DNS 2: 75.75.76.76</div><div class="gmail_default"><div class="gmail_default">DNS 1: 2001:558:feed::1</div><div class="gmail_default">
DNS 2: 2001:558:feed::2</div><div class="gmail_default"><br></div></div></div><div class="gmail_default" style="font-size:small">Today, the problem seems consistent with turning dnssec on and off on the router. If enabled, I have problems; if disabled, I get a clean bill of health out of <a href="http://test-ipv6.com">test-ipv6.com</a>.</div>
<div class="gmail_default" style="font-size:small"> - Jim</div><div class="gmail_default" style="font-size:small"><br></div></div>