I have several VPS 250 G11s iv machines. They run OpenBSD 7.6.
I recently activated IPv6 address on my egress interface and I notived that IPv6 connectivity is itermittent.
I can definitely reach out some IPv6 hosts in the internet as well as I can reach the host from my own ipv6 laptop, so there is IPv6 connectivity both ways in some shape or form.
However, every few minutes my machine is unreachable by IPv6 address for few minutes. Then it comes back and tye cycle continues.
Also, I cannot ping6 google.com at all:
Code
# ping6 -c4 google.com
PING google.com (2a00:1450:4001:81c::200e): 56 data bytes
--- google.com ping statistics ---
4 packets transmitted, 0 packets received, 100.0% packet lossTraceroute
Code
traceroute6 to google.com (2a00:1450:4001:81c::200e), 64 hops max, 60 byte packets
1 2a03:4000:45::2 (2a03:4000:45::2) 0.431 ms 0.403 ms 0.353 ms
2 2a00:11c0:47:3::122 (2a00:11c0:47:3::122) 0.478 ms 0.414 ms 0.519 ms
3 nug-b2-link.ip.twelve99.net (2001:2035:0:272d::1) 0.332 ms 0.285 ms 0.284 ms
4 * ffm-bb1-v6.ip.twelve99.net (2001:2034:1:6b::1) 3.764 ms 3.768 ms
5 * * *
6 lumen-ic-372142.ip.twelve99-cust.net (2001:2035:0:12ad::2) 15.807 ms google-ic-311122.ip.twelve99-cust.net (2001:2035:0:20d::2) 15.831 ms lumen-ic-372142.ip.twelve99-cust.net (2001:2035:0:12ad::2) 15.765 ms
7 * * *
... * * *
31 * * *
32 lumen-ic-372142.ip.twelve99-cust.net (2001:2035:0:12ad::2) 15.868 ms !P google-ic-311122.ip.twelve99-cust.net (2001:2035:0:20d::2) 15.781 ms !P lumen-ic-372142.ip.twelve99-cust.net (2001:2035:0:12ad::2) 15.96 ms !P
tcpdump shows a lot of neightbour solicitations coming from other subnets:
Code
tcpdump: listening on vio0, link-type EN10MB
15:28:03.525354 fe80::be0f:fe00:a333:fce3 > ff02::1:ff83:b8d1: icmp6: neighbor sol: who has 2a03:4000:45:788:5410:94ff:fe83:b8d1 [class 0xc0]
15:28:04.524201 fe80::be0f:fe00:a333:fce3 > ff02::1:ff84:2f66: icmp6: neighbor sol: who has nobody.yourvserver.net [class 0xc0]
15:28:04.524687 fe80::be0f:fe00:a333:fce3 > ff02::1:ffe1:af77: icmp6: neighbor sol: who has 2a03:4000:45:251:b8d2:c7ff:fee1:af77 [class 0xc0]
15:28:04.525155 fe80::be0f:fe00:a333:fce3 > ff02::1:ff93:540f: icmp6: neighbor sol: who has nobody.yourvserver.net [class 0xc0]
15:28:05.529808 fe80::be0f:fe00:a333:fce3 > ff02::1:ff93:540f: icmp6: neighbor sol: who has nobody.yourvserver.net [class 0xc0]
15:28:05.530246 fe80::be0f:fe00:a333:fce3 > ff02::1:ffe1:af77: icmp6: neighbor sol: who has 2a03:4000:45:251:b8d2:c7ff:fee1:af77 [class 0xc0]
15:28:05.530604 fe80::be0f:fe00:a333:fce3 > ff02::1:ff84:2f66: icmp6: neighbor sol: who has nobody.yourvserver.net [class 0xc0]
15:28:06.527504 fe80::be0f:fe00:a333:fce3 > ff02::1:ff84:2f66: icmp6: neighbor sol: who has nobody.yourvserver.net [class 0xc0]
15:28:06.527908 fe80::be0f:fe00:a333:fce3 > ff02::1:ffe1:af77: icmp6: neighbor sol: who has 2a03:4000:45:251:b8d2:c7ff:fee1:af77 [class 0xc0]
15:28:06.528384 fe80::be0f:fe00:a333:fce3 > ff02::1:ff93:540f: icmp6: neighbor sol: who has nobody.yourvserver.net [class 0xc0]
15:28:09.387537 fe80::be0f:fe00:a337:fba3 > ff02::1:ff62:470e: icmp6: neighbor sol: who has 2a03:4000:45:22b:38a2:c6ff:fe62:470e [class 0xc0]
15:28:10.390616 fe80::be0f:fe00:a337:fba3 > ff02::1:ff62:470e: icmp6: neighbor sol: who has 2a03:4000:45:22b:38a2:c6ff:fe62:470e [class 0xc0]
15:28:11.389839 fe80::be0f:fe00:a337:fba3 > ff02::1:ff62:470e: icmp6: neighbor sol: who has 2a03:4000:45:22b:38a2:c6ff:fe62:470e [class 0xc0]
15:28:15.530516 fe80::be0f:fe00:a333:fce3 > ff02::1:ffe1:af77: icmp6: neighbor sol: who has 2a03:4000:45:251:b8d2:c7ff:fee1:af77 [class 0xc0]
15:28:16.051514 2a03:4000:45:138:1869:ccff:fed3:de3d > ff02::1:ffc4:4322: icmp6: neighbor sol: who has fe80::5a11:22ff:fec4:4322
15:28:16.530259 fe80::be0f:fe00:a333:fce3 > ff02::1:ff62:470e: icmp6: neighbor sol: who has 2a03:4000:45:22b:38a2:c6ff:fe62:470e [class 0xc0]
15:28:16.530777 fe80::be0f:fe00:a333:fce3 > ff02::1:ffd5:13de: icmp6: neighbor sol: who has 2a03:4000:45:1b9:d8e2:67ff:fed5:13de [class 0xc0]
15:28:16.532877 fe80::be0f:fe00:a333:fce3 > ff02::1:ffe1:af77: icmp6: neighbor sol: who has 2a03:4000:45:251:b8d2:c7ff:fee1:af77 [class 0xc0]
15:28:17.059574 2a03:4000:45:138:1869:ccff:fed3:de3d > ff02::1:ffc4:4322: icmp6: neighbor sol: who has fe80::5a11:22ff:fec4:4322
15:28:17.530277 fe80::be0f:fe00:a333:fce3 > ff02::1:ffc9:7a52: icmp6: neighbor sol: who has 2a03:4000:45:2d:741e:2cff:fec9:7a52 [class 0xc0]
15:28:17.534267 fe80::be0f:fe00:a333:fce3 > ff02::1:ffd5:13de: icmp6: neighbor sol: who has 2a03:4000:45:1b9:d8e2:67ff:fed5:13de [class 0xc0]
15:28:17.534684 fe80::be0f:fe00:a333:fce3 > ff02::1:ff62:470e: icmp6: neighbor sol: who has 2a03:4000:45:22b:38a2:c6ff:fe62:470e [class 0xc0]Those solicitations are not from my assigned /64 prefix, suggesting that I'm sharing the link with others.
Please advise how to deal with that issue. I'm running several machines with identical configuration with netcup competition and none of them experience similar issues.
