Community discussions

MUM Europe 2020
User avatar
Member Candidate
Member Candidate
Topic Author
Posts: 121
Joined: Tue Dec 16, 2008 12:17 am

IPv6: Trouble reaching * web sites?

Thu Aug 04, 2011 6:31 pm

Is anyone else using globally routed IPv6 addresses having trouble reaching * web sites?
user@host:~$ ping6
PING6(56=40+8+8 bytes) --> 2a02:610:7501:1000::201

--- ping6 statistics ---
100 packets transmitted, 0 packets received, 100.0% packet loss

user@host:~$ traceroute6
traceroute6 to (2a02:610:7501:1000::201), 64 hops max, 12 byte packets
 6  36.414 ms  40.620 ms  49.199 ms
 7  71.635 ms  68.934 ms  69.898 ms
 8  108.138 ms  93.704 ms  115.358 ms
 9  130.926 ms  143.679 ms  109.993 ms
10  176.192 ms  177.757 ms  188.958 ms
11  208.305 ms  195.920 ms  200.634 ms
12  * * *
13  * * *
... this continues until I terminate the traceroute ...
Apparently my ISP routes my IPv6 to MikroTik's sites via Hurricane Electric's network. I'm curious if the issues reaching * sites only affects people routing along similar paths (i.e. via, or is more global in nature?

Or could MikroTik have their web servers behind a RouterOS router, and perhaps they're finally experiencing the random IPv6 routing issues I keep experiencing with RouterOS and IPv6 routes wherein when my IPv6 connectivity fails, I simply fiddle with my router's IPv6 default route distance (changing it, then changing it back to what it was before) and like magic, the route starts working like it should have in the first place?

Aaron out.
Forum Guru
Forum Guru
Posts: 7734
Joined: Tue Aug 11, 2009 3:19 am

Re: IPv6: Trouble reaching * web sites?

Thu Aug 04, 2011 6:57 pm\

It's an issue with HE's peers getting through to Mikrotik's ISP.

The HE ticket is stale, though. They said they'd talk to the peer that's their next hop, which is where traffic is dropping off. Haven't heard from them since. It worked sporadically for me last night, but then failed again today.

Mikrotik should probably talk to their uplink to put pressure on the failing peer from both sides.
Specific answers require specific questions. When in doubt, post the output of "/ip address print detail", "/ip route print detail", "/interface print detail", "/ip firewall export", and an accurate network diagram.

Who is online

Users browsing this forum: Google [Bot] and 85 guests