<div dir="ltr"><div dir="ltr">Hi Brain <div><br></div><div><br></div><div>Let's chat offlist to find why this is happening. The behaviour looks unusual and needs more troubleshooting. </div><div><br></div><div><br></div><div>Thanks</div><div><br></div><div><br></div><div><br></div><div>Anurag Bhatia </div><div>(Hurricane Electric) </div></div><br><div class="gmail_quote"><div dir="ltr">On Thu, Dec 20, 2018 at 11:06 PM Brian J. Murrell <<a href="mailto:brian@interlinx.bc.ca">brian@interlinx.bc.ca</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I've been trying to figure out why I can reach an IPv6 address at<br>
Facebook (2a03:2880:f012:3:face:b00c:0:1) through (only) one of my two<br>
Internet connections as well as via an HE IPv6 tunnel but not the other<br>
of my two ISP connections<br>
<br>
At one point in time a traceroute was dying inside of <a href="http://he.net" rel="noreferrer" target="_blank">he.net</a>:<br>
<br>
Host Loss% Snt Last Avg Best Wrst StDev<br>
1. 2001:1970:5261:d600::1 0.0% 7 2.1 1.3 0.7 2.9 0.8<br>
2. 2001:1970:4000:82::1 0.0% 7 10.0 14.0 8.3 37.9 10.6<br>
3. 2001:1970:0:1a6::1 16.7% 7 13.2 215.5 10.8 1031. 455.9<br>
4. <a href="http://he.ip6.torontointernetxchange.net" rel="noreferrer" target="_blank">he.ip6.torontointernetxchange.net</a> 0.0% 7 12.3 12.9 11.2 15.3 1.6<br>
5. <a href="http://100ge9-2.core2.chi1.he.net" rel="noreferrer" target="_blank">100ge9-2.core2.chi1.he.net</a> 0.0% 7 23.6 23.0 21.3 27.6 2.2<br>
6. <a href="http://100ge15-2.core1.chi1.he.net" rel="noreferrer" target="_blank">100ge15-2.core1.chi1.he.net</a> 0.0% 7 21.7 22.5 21.6 24.9 1.2<br>
7. <a href="http://100ge12-1.core1.atl1.he.net" rel="noreferrer" target="_blank">100ge12-1.core1.atl1.he.net</a> 0.0% 7 34.2 35.1 34.1 36.1 0.7<br>
8. <a href="http://100ge5-1.core1.tpa1.he.net" rel="noreferrer" target="_blank">100ge5-1.core1.tpa1.he.net</a> 0.0% 7 49.1 46.6 44.8 49.1 1.5<br>
9. <a href="http://100ge12-1.core1.mia1.he.net" rel="noreferrer" target="_blank">100ge12-1.core1.mia1.he.net</a> 0.0% 7 51.6 54.5 50.5 73.3 8.3<br>
10. ???<br>
<br>
But I think it getting that far time was an anomaly and frankly it<br>
usually dies even before exiting my ISP's (Cogeco) network like this:<br>
<br>
Host Loss% Snt Last Avg Best Wrst StDev<br>
1. 2001:1970:5261:d600::1 0.0% 33 0.6 0.7 0.6 1.0 0.1<br>
2. 2001:1970:4000:82::1 0.0% 33 8.2 10.8 8.1 40.5 5.6<br>
3. 2001:1970:0:1a7::1 15.2% 33 23.4 20.1 16.5 23.4 1.5<br>
4. 2001:1970:0:61::1 33.3% 33 16.8 17.6 14.5 25.9 2.5<br>
5. 2001:1978:1300::1 0.0% 33 16.0 17.5 14.2 29.6 3.1<br>
6. 2001:1978:203::45 0.0% 33 30.7 30.7 28.4 35.1 1.7<br>
7. ???<br>
<br>
When I asked the kind folks at <a href="http://he.net" rel="noreferrer" target="_blank">he.net</a> for some advice about the problem<br>
(i.e. in the first traceroute above) their diagnosis was that<br>
Facebook's IPv6 router(s) likely didn't have a route back to my Cogeco<br>
IPv6 address.<br>
<br>
Trying to talk to my ISP (again, Cogeco) has been impossible. One<br>
simply cannot reach the people who know more than how to reset your<br>
router and configure your e-mail.<br>
<br>
I wonder how I could go any further with this to confirm the diagnosis<br>
that Facebook doesn't have a route to the Cogeco network's IPv6 address<br>
space given that I only have access to my end of the path.<br>
<br>
Cheers,<br>
b.<br>
<br>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div><font face="arial, helvetica, sans-serif"><br></font></div><div><br></div><font face="arial, helvetica, sans-serif">Anurag Bhatia<br></font><div></div><div><font face="arial, helvetica, sans-serif"><a href="http://anuragbhatia.com" target="_blank">anuragbhatia.com</a></font></div></div></div></div></div></div></div>