Hi, I switched a tunnel I haven't been using for some time from Heartbeat to static and now get no connectivity. Bandwidth graphs on the Tunnel settings page show random spikes, but a constant 100% packet loss. Handle DA5-6BONE Tunnel ID T22976 PoP IPv4 91.184.37.98 Your IPv4 89.238.64.203 IPv6 Prefix 2a01:198:200:5f9::1/64 PoP IPv6 2a01:198:200:5f9::1 Your IPv6 2a01:198:200:5f9::2 Created 2009-09-03 22:42:52 CET State Enabled $ ip addr show dev sixxs scope global 16: sixxs: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1280 qdisc noqueue state UNKNOWN link/sit 89.238.64.203 peer 91.184.37.98 inet6 2a01:198:47a::1/48 scope global valid_lft forever preferred_lft forever inet6 2a01:198:200:5f9::2/64 scope global valid_lft forever preferred_lft forever $ ip route get 2a01:198:200:5f9::1 2a01:198:200:5f9::1 from :: via :: dev sixxs proto kernel src 2a01:198:200:5f9::2 metric 256 mtu 1280 advmss 1220 hoplimit 0 $ sudo tcpdump -nvi eth0 -c 15 host 91.184.37.98 or icmp& sleep 1; ping -I 89.238.64.203 -c 5 91.184.37.98; ping6 -c 5 2a01:198:200:5f9::1 [1] 8070 tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes PING 91.184.37.98 (91.184.37.98) from 89.238.64.203 : 56(84) bytes of data. 19:54:13.475084 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 89.238.64.203 > 91.184.37.98: ICMP echo request, id 34847, seq 1, length 64 19:54:13.487617 IP (tos 0x0, ttl 58, id 1180, offset 0, flags [none], proto ICMP (1), length 84) 91.184.37.98 > 89.238.64.203: ICMP echo reply, id 34847, seq 1, length 64 64 bytes from 91.184.37.98: icmp_seq=1 ttl=58 time=12.5 ms 19:54:14.477633 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 89.238.64.203 > 91.184.37.98: ICMP echo request, id 34847, seq 2, length 64 19:54:14.487159 IP (tos 0x0, ttl 58, id 1181, offset 0, flags [none], proto ICMP (1), length 84) 91.184.37.98 > 89.238.64.203: ICMP echo reply, id 34847, seq 2, length 64 64 bytes from 91.184.37.98: icmp_seq=2 ttl=58 time=9.53 ms 19:54:15.481605 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 89.238.64.203 > 91.184.37.98: ICMP echo request, id 34847, seq 3, length 64 19:54:15.491499 IP (tos 0x0, ttl 58, id 1182, offset 0, flags [none], proto ICMP (1), length 84) 91.184.37.98 > 89.238.64.203: ICMP echo reply, id 34847, seq 3, length 64 64 bytes from 91.184.37.98: icmp_seq=3 ttl=58 time=9.90 ms 19:54:16.485565 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 89.238.64.203 > 91.184.37.98: ICMP echo request, id 34847, seq 4, length 64 19:54:16.495444 IP (tos 0x0, ttl 58, id 1183, offset 0, flags [none], proto ICMP (1), length 84) 91.184.37.98 > 89.238.64.203: ICMP echo reply, id 34847, seq 4, length 64 64 bytes from 91.184.37.98: icmp_seq=4 ttl=58 time=9.89 ms 19:54:17.489514 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 89.238.64.203 > 91.184.37.98: ICMP echo request, id 34847, seq 5, length 64 19:54:17.549243 IP (tos 0x0, ttl 58, id 1184, offset 0, flags [none], proto ICMP (1), length 84) 91.184.37.98 > 89.238.64.203: ICMP echo reply, id 34847, seq 5, length 64 64 bytes from 91.184.37.98: icmp_seq=5 ttl=58 time=59.7 ms --- 91.184.37.98 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4014ms rtt min/avg/max/mdev = 9.538/20.329/59.740/19.735 ms PING 2a01:198:200:5f9::1(2a01:198:200:5f9::1) 56 data bytes 19:54:17.573636 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto IPv6 (41), length 124) 89.238.64.203 > 91.184.37.98: IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64) 2a01:198:200:5f9::2 > 2a01:198:200:5f9::1: ICMP6, echo request, length 64, seq 1 19:54:18.573526 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto IPv6 (41), length 124) 89.238.64.203 > 91.184.37.98: IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64) 2a01:198:200:5f9::2 > 2a01:198:200:5f9::1: ICMP6, echo request, length 64, seq 2 19:54:19.573457 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto IPv6 (41), length 124) 89.238.64.203 > 91.184.37.98: IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64) 2a01:198:200:5f9::2 > 2a01:198:200:5f9::1: ICMP6, echo request, length 64, seq 3 19:54:20.573450 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto IPv6 (41), length 124) 89.238.64.203 > 91.184.37.98: IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64) 2a01:198:200:5f9::2 > 2a01:198:200:5f9::1: ICMP6, echo request, length 64, seq 4 19:54:21.573378 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto IPv6 (41), length 124) 89.238.64.203 > 91.184.37.98: IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64) 2a01:198:200:5f9::2 > 2a01:198:200:5f9::1: ICMP6, echo request, length 64, seq 5 15 packets captured 15 packets received by filter 0 packets dropped by kernel --- 2a01:198:200:5f9::1 ping statistics --- 5 packets transmitted, 0 received, 100% packet loss, time 3999ms Any hints appreciated, Daniel