My ID is MWI2-SIXXS, using tunnel T15207 to sesto01. After about 14:00 today, 2009-05-07, IPv6 connectivity through the tunnel stopped. Running aiccu test stops working here: ###### [6/8] Ping the IPv6 Remote/PoP Inner Tunnel Endpoint (2001:16d8:ff00:243::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 PING6(56=40+8+8 bytes) 2001:16d8:ff00:243::2 --> 2001:16d8:ff00:243::1 --- 2001:16d8:ff00:243::1 ping6 statistics --- 3 packets transmitted, 0 packets received, 100.0% packet loss ###### I tested with and without firewall rules enabled with the same result. Listening with tcpdump on the tunnel interface I see only traffic going out, nothing coming back from sesto01. Looking at the traffic graphs for sesto01, I see traffic has dropped to zero quite recently, so maybe I'm not alone: https://www.sixxs.net/misc/traffic/?pop=sesto01&last=1day A traceroute6 from a server in co-lo at XS4All towards my tunnel endpoint: ecki:~ % traceroute6 -n 2001:16d8:ff00:243::2 traceroute6 to 2001:16d8:ff00:243::2 (2001:16d8:ff00:243::2) from 2001:888:22b3::2, 64 hops max, 12 byte packets 1 2001:888:22b3::1 0.510 ms 0.465 ms 0.486 ms 2 2001:888:0:114::1 0.483 ms 0.487 ms 0.489 ms 3 2001:888:2:2::1 0.985 ms 0.986 ms 0.989 ms 4 2001:470:0:e8::1 0.987 ms 0.986 ms 0.989 ms 5 2001:7f8:1::a501:6150:1 2.485 ms 1.486 ms 1.488 ms 6 2001:16d8:1:1308::72 12.480 ms 12.479 ms 12.483 ms 7 2001:16d8:1:1306::73 12.979 ms 13.478 ms 12.986 ms 8 2001:16d8:1:1317::84 32.464 ms 33.466 ms 33.470 ms 9 2001:16d8:1:1316::87 33.966 ms 33.967 ms 33.470 ms 10 * * * Please tell me if I can do anything more.