Hello, i have two Tunnels (T110110 and T10619). The Tunnel-Pop fr T110110 is Netcologne and this tunnel isn't working anymore. When i switch to T10619 on my local machine (Easynet) everything works fine. Aiccu test: [root@afrilymp ~]# aiccu test Tunnel Information for T110110: POP Id : decgn01 IPv6 Local : 2001:4dd0:ff00:108d::2/64 IPv6 Remote : 2001:4dd0:ff00:108d::1/64 Tunnel Type : 6in4-heartbeat Adminstate : enabled Userstate : enabled ####### ####### AICCU Quick Connectivity Test ####### ####### [1/8] Ping the IPv4 Local/Your Outer Endpoint (10.1.0.2) ### This should return so called 'echo replies' ### If it doesn't then check your firewall settings ### Your local endpoint should always be pingable ### It could also indicate problems with your IPv4 stack PING 10.1.0.2 (10.1.0.2) 56(84) bytes of data. 64 bytes from 10.1.0.2: icmp_seq=1 ttl=64 time=0.038 ms 64 bytes from 10.1.0.2: icmp_seq=2 ttl=64 time=0.033 ms 64 bytes from 10.1.0.2: icmp_seq=3 ttl=64 time=0.030 ms --- 10.1.0.2 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2000ms rtt min/avg/max/mdev = 0.030/0.033/0.038/0.007 ms ###### Did this work? [Y/n] y ####### [2/8] Ping the IPv4 Remote/PoP Outer Endpoint (78.35.24.124) ### These pings should reach the PoP and come back to you ### In case there are problems along the route between your ### host and the PoP this could not return replies ### Check your firewall settings if problems occur PING 78.35.24.124 (78.35.24.124) 56(84) bytes of data. 64 bytes from 78.35.24.124: icmp_seq=1 ttl=59 time=12.8 ms 64 bytes from 78.35.24.124: icmp_seq=2 ttl=59 time=12.7 ms 64 bytes from 78.35.24.124: icmp_seq=3 ttl=59 time=12.5 ms --- 78.35.24.124 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2002ms rtt min/avg/max/mdev = 12.561/12.697/12.803/0.101 ms ###### Did this work? [Y/n] y ####### [3/8] Traceroute to the PoP (78.35.24.124) over IPv4 ### This traceroute should reach the PoP ### In case this traceroute fails then you have no connectivity ### to the PoP and this is most probably the problem traceroute to 78.35.24.124 (78.35.24.124), 30 hops max, 60 byte packets 1 netconnect.box (10.1.0.1) 0.406 ms 0.671 ms 0.820 ms 2 e120-scsto1.netcologne.de (195.14.226.59) 13.696 ms 13.796 ms 14.771 ms 3 81.173.197.73 (81.173.197.73) 14.317 ms 14.792 ms 15.063 ms 4 core-sto2-vl427.netcologne.de (78.35.33.221) 15.185 ms 15.370 ms 15.514 ms 5 core-eup2-t32.netcologne.de (87.79.17.29) 16.416 ms 16.424 ms 16.918 ms 6 sixxs-pop1.netcologne.net (78.35.24.124) 16.638 ms 12.564 ms 13.054 ms ###### Did this work? [Y/n] y ###### [4/8] Checking if we can ping IPv6 localhost (::1) ### This confirms if your IPv6 is working ### If ::1 doesn't reply then something is wrong with your IPv6 stack PING ::1(::1) 56 data bytes 64 bytes from ::1: icmp_seq=1 ttl=64 time=0.033 ms 64 bytes from ::1: icmp_seq=2 ttl=64 time=0.037 ms 64 bytes from ::1: icmp_seq=3 ttl=64 time=0.043 ms --- ::1 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 1999ms rtt min/avg/max/mdev = 0.033/0.037/0.043/0.008 ms ###### Did this work? [Y/n] y ###### [5/8] Ping the IPv6 Local/Your Inner Tunnel Endpoint (2001:4dd0:ff00:108d::2) ### This confirms that your tunnel is configured ### If it doesn't reply then check your interface and routing tables PING 2001:4dd0:ff00:108d::2(2001:4dd0:ff00:108d::2) 56 data bytes 64 bytes from 2001:4dd0:ff00:108d::2: icmp_seq=1 ttl=64 time=0.050 ms 64 bytes from 2001:4dd0:ff00:108d::2: icmp_seq=2 ttl=64 time=0.037 ms 64 bytes from 2001:4dd0:ff00:108d::2: icmp_seq=3 ttl=64 time=0.045 ms --- 2001:4dd0:ff00:108d::2 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 1999ms rtt min/avg/max/mdev = 0.037/0.044/0.050/0.005 ms ###### Did this work? [Y/n] y ###### [6/8] Ping the IPv6 Remote/PoP Inner Tunnel Endpoint (2001:4dd0:ff00:108d::1) ### This confirms the reachability of the other side of the tunnel ### If it doesn't reply then check your interface and routing tables ### Don't forget to check your firewall of course ### If the previous test was succesful then this could be both ### a firewalling and a routing/interface problem PING 2001:4dd0:ff00:108d::1(2001:4dd0:ff00:108d::1) 56 data bytes --- 2001:4dd0:ff00:108d::1 ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 2000ms ###### Did this work? [Y/n] n In wireshark i can see the outgoing ICMP-Packages on the tunnel interface when pinging 2001:4dd0:ff00:108d::1 but i get no response, so the pop seems to be down. Can you please check this? Thank you Felix Becker