hi, i'm experiencing problems with my ipv6 tunnel to sixxs. here are serveral outputs of my connection: h062040172073:~ # ping6 3ffe:8114:1000::46c PING 3ffe:8114:1000::46c(3ffe:8114:1000::46c) 56 data bytes From 3ffe:8114:1000::46d icmp_seq=2 Destination unreachable: Address unreachable From 3ffe:8114:1000::46d icmp_seq=3 Destination unreachable: Address unreachable From 3ffe:8114:1000::46d icmp_seq=4 Destination unreachable: Address unreachable From 3ffe:8114:1000::46d icmp_seq=5 Destination unreachable: Address unreachable --- 3ffe:8114:1000::46c ping statistics --- 5 packets transmitted, 0 received, +4 errors, 100% packet loss, time 3999ms h062040172073:~ # ifconfig eth0 Link encap:Ethernet HWaddr 00:E0:18:98:0A:96 inet addr:62.40.172.73 Bcast:62.40.172.255 Mask:255.255.255.0 inet6 addr: fe80::2e0:18ff:fe98:a96/64 Scope:Link UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1 RX packets:28651892 errors:0 dropped:0 overruns:0 frame:0 TX packets:1444230 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:2516719825 (2400.1 Mb) TX bytes:812317845 (774.6 Mb) Interrupt:10 Base address:0x2000 sit1 Link encap:IPv6-in-IPv4 inet6 addr: 3ffe:8114:1000::46d/127 Scope:Global inet6 addr: fe80::3e28:ac49/128 Scope:Link UP POINTOPOINT RUNNING NOARP MTU:1480 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:83 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:10148 (9.9 Kb) output from thethereal: 3.994002 3ffe:8114:1000::46d -> 3ffe:8114:1000::46c ICMPv6 Echo request 4.027160 212.19.192.219 -> 62.40.172.73 ICMP Destination unreachable 4.993986 3ffe:8114:1000::46d -> 3ffe:8114:1000::46c ICMPv6 Echo request 5.025288 212.19.192.219 -> 62.40.172.73 ICMP Destination unreachable 5.993989 3ffe:8114:1000::46d -> 3ffe:8114:1000::46c ICMPv6 Echo request 6.003965 62.40.172.73 -> 193.80.0.8 SSH Encrypted response packet len=100 6.025946 212.19.192.219 -> 62.40.172.73 ICMP Destination unreachable 6.994001 3ffe:8114:1000::46d -> 3ffe:8114:1000::46c ICMPv6 Echo request 7.028403 212.19.192.219 -> 62.40.172.73 ICMP Destination unreachable h062040172073:~ # h062040172073:~ # ip tun sho sit0: ipv6/ip remote any local any ttl 64 nopmtudisc sit1: ipv6/ip remote 212.19.192.219 local 62.40.172.73 ttl 64 h062040172073:~ # ip -6 ro sho 3ffe:8114:1000::46c/127 via :: dev sit1 proto kernel metric 256 mtu 1480 advmss 1420 3ffe:8114:2000:1280::/64 dev eth0 proto kernel metric 256 mtu 1500 advmss 1440 2000::/3 via 3ffe:8114:1000::46c dev sit1 metric 1 mtu 1480 advmss 1420 fe80::/64 dev eth1 proto kernel metric 256 mtu 1500 advmss 1440 fe80::/64 dev eth0 proto kernel metric 256 mtu 1500 advmss 1440 fe80::/64 via :: dev sit1 proto kernel metric 256 mtu 1480 advmss 1420 ff00::/8 dev eth1 proto kernel metric 256 mtu 1500 advmss 1440 ff00::/8 dev eth0 proto kernel metric 256 mtu 1500 advmss 1440 ff00::/8 dev sit1 proto kernel metric 256 mtu 1480 advmss 1420 unreachable default dev lo proto none metric -1 error -101 h062040172073:~ # ip -6 addr sho 1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue inet6 ::1/128 scope host 3: eth0: <BROADCAST,MULTICAST,NOTRAILERS,UP> mtu 1500 qdisc pfifo_fast qlen 100 inet6 fe80::2e0:18ff:fe98:a96/64 scope link inet6 3ffe:8114:2000:1280:2e0:18ff:fe98:a96/64 scope global 6: sit1@NONE: <POINTOPOINT,NOARP,UP> mtu 1480 qdisc noqueue inet6 3ffe:8114:1000::46d/127 scope global inet6 fe80::3e28:ac49/128 scope link Any ideas? TIA alex