On Sun, Jan 19, 2025 at 09:24:15PM +0100, Willy Manga wrote: > > myhost.com $ cat /etc/hostname.vio0 > > inet aaa.bbb.ccc.ddd/22 > > inet6 2a03:xxxx:yyyy:zzzz::1 > > Where is the mask of your IPv6 address? > Is it a typo while you were redacting this file?
Yes, it's default /64, like this: inet6 2a03:xxxx:yyyy:zzzz::1/64 Overall, the behavior changed a bit today. I can no longer "enable" it by ping6 google.com. In fact, I can't ping6 google.com at all. But details first: # ifconfig vio0 ... inet6 2a03:xxxx:yyyy:zzzz::1 prefixlen 64 My traceroute6 to google.com goes into places: traceroute6 to google.com (2a00:1450:4001:830::200e), 64 hops max, 60 byte packets 1 2a03:4000:45::2 (2a03:4000:45::2) 0.483 ms 0.377 ms 0.383 ms 2 2a00:11c0:47:3::122 (2a00:11c0:47:3::122) 0.447 ms 0.365 ms 0.339 ms 3 2001:2035:0:272d::1 (2001:2035:0:272d::1) 0.374 ms 0.273 ms 0.262 ms 4 2001:2034:1:6b::1 (2001:2034:1:6b::1) 3.871 ms * 3.812 ms 5 2001:2034:0:136::1 (2001:2034:0:136::1) 16.68 ms 17.026 ms * 6 2001:2035:0:20d::2 (2001:2035:0:20d::2) 15.949 ms * * 7 * * * ... * * * 30 * * * 31 2001:2035:0:12ad::2 (2001:2035:0:12ad::2) 16.067 ms !P 2001:2035:0:20d::2 (2001:2035:0:20d::2) 16.023 ms !P * What is the !P output? It says 64 hops max, but 31st is the last before traceroute6 finishes. # ping6 -c4 google.com PING google.com (2a00:1450:4001:830::200e): 56 data bytes --- google.com ping statistics --- 4 packets transmitted, 0 packets received, 100.0% packet loss but ping6 hetzner.com (their competitor) is reachable, proving that IPv6 works in general. Very low ping latency suggests they are co-located in the same datacenter. Prehaps that's why it works. Also, the machine can be reached from outside. I run a ping6 for several hours and it works with occasional Address unreachable for several minutes: $ ping -6 2a03:xxxx:yyyy:zzzz::1 ... 64 bytes from 2a03:xxxx:yyyy:zzzz::1: icmp_seq=81 ttl=55 time=23.7 ms 64 bytes from 2a03:xxxx:yyyy:zzzz::1: icmp_seq=82 ttl=55 time=23.0 ms >From 2a00:11c0:47:3::123 icmp_seq=90 Destination unreachable: Address >unreachable >From 2a00:11c0:47:3::123 icmp_seq=92 Destination unreachable: Address >unreachable (goes for about 5 minutes and resumes) Another test I made was using tcpdump vio0 icmp6 and I can see *a log* of neighbour solicitation packates coming from OTHER subnets, suggesting that my vio0 shares link with other networks. And last but not least, somebody on forum.freebsd.org reported very similar issue with intermittent connectivity. I raised the issue with support, but I try to gater as much knowledge ammunition to repeal the ususal "we don't support your OS" pushback. Best regards, Chris Narkiewicz
