Hello, for 5 days now I get messages that our tunnel(T63961) is down. But I am able to ping our tunnel-endpoint(2001:6f8:1c00:453::2) from my home site. poisonapple:~ bert$ ping6 2001:6f8:1c00:453::2 PING6(56=40+8+8 bytes) 2002:578f:3c2a::d69a:20ff:fed1:7d16 --> 2001:6f8:1c00:453::2 16 bytes from 2001:6f8:1c00:453::2, icmp_seq=0 hlim=50 time=79.450 ms 16 bytes from 2001:6f8:1c00:453::2, icmp_seq=1 hlim=50 time=78.852 ms 16 bytes from 2001:6f8:1c00:453::2, icmp_seq=2 hlim=50 time=79.092 ms 16 bytes from 2001:6f8:1c00:453::2, icmp_seq=3 hlim=50 time=78.907 ms 16 bytes from 2001:6f8:1c00:453::2, icmp_seq=4 hlim=50 time=79.163 ms ^C --- 2001:6f8:1c00:453::2 ping6 statistics --- 5 packets transmitted, 5 packets received, 0.0% packet loss round-trip min/avg/max/std-dev = 78.852/79.093/79.450/0.212 ms If I try traceroute from sixxs-website there is 100% loss from my POP (DEHAM02) IPv6 traceroute from deham02.sixxs.net @ Easynet, AS4589 to 2001:6f8:1c00:453::2 : Hop Node Loss% Sent Last Avg Best Worst StDev ASN Organisation When the ASN of a prefix is blank then the prefix doesn't have an route6 entry in the registries. If I try it from another POP than its working: IPv6 traceroute IPv6 traceroute from dedus01.sixxs.net @ SpeedPartner GmbH , AS34225 to 2001:6f8:1c00:453::2 : Hop Node Loss% Sent Last Avg Best Worst StDev ASN Organisation 1. 2a01:198:200::1 0.0% 5 1.8 2.3 1.6 3.6 0.8 2. 2001:7f8:3a:e102::1 0.0% 5 5.3 13.3 4.4 20.8 7.8 3. 2001:7f8::11ed:0:1 40.0% 5 6.6 6.7 6.4 7.0 0.3 4. 2001:6f8:1:0:87:86:77:246 0.0% 5 4.9 5.6 4.9 6.7 0.8 5. 2001:6f8:1:0:87:86:71:229 0.0% 5 22.5 29.1 5.9 103.8 42.4 6. 2001:6f8:800:1003::3 0.0% 5 21.2 28.1 20.0 47.6 11.8 7. 2001:6f8:1c00:453::2 0.0% 5 46.2 53.6 45.9 64.0 8.3 If I do an outbound traceroute it is working too: traceroute6 to ipv6.l.google.com (2a00:1450:4001:c01::63) from 2001:6f8:1c00:453::2, 18 hops max, 12 byte packets 1 2001:6f8:1c00:453::1 27.945 ms 25.976 ms 26.971 ms 2 2001:6f8:800:1003::209:55 27.543 ms 26.243 ms 26.122 ms 3 * * * 4 2001:6f8:1:0:87:86:77:67 29.002 ms 26.359 ms * 5 2001:6f8:1:0:86:87:77:81 26.350 ms 26.806 ms 27.399 ms 6 2001:6f8:1:0:87:86:77:83 26.712 ms 26.505 ms 26.535 ms 7 2001:6f8:1:0:87:86:77:62 41.092 ms 41.262 ms * 8 2001:6f8:1:0:87:86:77:71 35.943 ms 35.981 ms * 9 * * 2001:6f8:1:0:87:86:77:249 36.615 ms 10 2001:7f8::3b41:0:1 36.720 ms 39.288 ms 36.642 ms 11 2001:4860::1:0:11 36.669 ms 36.487 ms 38.267 ms 12 2001:4860:0:1::21f 37.184 ms 50.248 ms 38.126 ms 13 2a00:1450:4001:c01::63 36.797 ms 36.731 ms 37.228 ms I hope I can solve it before my tunnel gets switched off and my ISKs are out... Thanks Bert Mittelstedt