Hello! I think there are some routing issues with the /48 R249429 allocated to T150293. The /64 allocated at R231930 and at the end of the tunnel are working fine: my end of tunnel (which happens to fall within 2001:4830:1300/48 PING 2001:4830:1300:2::2(2001:4830:1300:2::2) 32 data bytes 40 bytes from 2001:4830:1300:2::2: icmp_seq=0 ttl=49 time=411 ms 40 bytes from 2001:4830:1300:2::2: icmp_seq=1 ttl=49 time=405 ms 40 bytes from 2001:4830:1300:2::2: icmp_seq=2 ttl=49 time=407 ms 40 bytes from 2001:4830:1300:2::2: icmp_seq=3 ttl=49 time=406 ms R231930: PING 2001:4830:1300:8002::1337(2001:4830:1300:8002::1337) 32 data bytes 40 bytes from 2001:4830:1300:8002::1337: icmp_seq=0 ttl=49 time=406 ms 40 bytes from 2001:4830:1300:8002::1337: icmp_seq=1 ttl=49 time=406 ms 40 bytes from 2001:4830:1300:8002::1337: icmp_seq=2 ttl=49 time=406 ms 40 bytes from 2001:4830:1300:8002::1337: icmp_seq=3 ttl=49 time=406 ms however anything router to the R249429 /48 (other than the ptp link, which falls within this range) wont work. R249429 PING 2001:4830:1300:4::1336(2001:4830:1300:4::1336) 32 data bytes From 2001:4830:1300:4::1 icmp_seq=0 Destination unreachable: No route From 2001:4830:1300:4::1 icmp_seq=1 Destination unreachable: No route From 2001:4830:1300:4::1 icmp_seq=2 Destination unreachable: No route From 2001:4830:1300:4::1 icmp_seq=3 Destination unreachable: No route my end of tunnel (which happens to fall within 2001:4830:1300/48 PING 2001:4830:1300:2::2(2001:4830:1300:2::2) 32 data bytes 40 bytes from 2001:4830:1300:2::2: icmp_seq=0 ttl=49 time=411 ms 40 bytes from 2001:4830:1300:2::2: icmp_seq=1 ttl=49 time=405 ms 40 bytes from 2001:4830:1300:2::2: icmp_seq=2 ttl=49 time=407 ms 40 bytes from 2001:4830:1300:2::2: icmp_seq=3 ttl=49 time=406 ms I've confirmed this by packet sniffing my ipv6 tunnel interface, it seems anything on 2001:4830:1300/48 other than 2001:4830:1300:2::2 isn't being routed to me. please help :)