Hi, it seems that Subnet 2001:6f8:1def::/48 is not routed to Tunnelendpoint 2001:6f8:1c00:a7::2. Traceroute shows "Network unreachable": andy@routerv6:~$ traceroute6 2001:6f8:1def::1 traceroute to 2001:6f8:1def::1 (2001:6f8:1def::1), 30 hops max, 80 byte packets [..] 5 2001:6f8:1:0:87:86:71:229 (2001:6f8:1:0:87:86:71:229) 39.152 ms 38.547 ms 39.029 ms 6 2001:6f8:800:1003::3 (2001:6f8:800:1003::3) 46.411 ms !N 31.783 ms !N 26.516 ms !N Subnet ConfigurationThe configuration for this subnet looks like: IPv6 Them 2001:6f8:1c00:a7::2/64 (T23025) Prefix 2001:6f8:1def::/48 State Enabled Best Regards and TIA Andreas Aust