Ipv6 routing not working for opam.ocaml.org
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Since May 15, 2023.
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Description
Hello! I am unable to run opam init on an ipv6-only host due to a routing issue to opam.ocaml.org. The domain resolves to 2001:bc8:5080:8e02::1 and 2001:bc8:1d80:4600::1. When I try to run tracepath it seems to go into a loop:
$ tracepath 2001:bc8:1d80:4600::1
[...SNIP...]
9: 2001:1900:5:2:2:0:11c:6b2 51.250ms asymm 8
10: 2001:bc8:1d00:1::1 51.624ms asymm 11
11: 2001:bc8:1d10:4::1 52.090ms
12: 2001:bc8:1d10:4::6 49.801ms asymm 11
13: 2001:bc8:1d10:4::1 52.756ms asymm 12
14: 2001:bc8:1d10:4::6 51.107ms asymm 11
15: 2001:bc8:1d10:4::1 52.004ms asymm 11
16: 2001:bc8:1d10:4::6 49.985ms asymm 11
17: 2001:bc8:1d10:4::1 52.133ms asymm 12
18: 2001:bc8:1d10:4::6 51.931ms asymm 11
19: 2001:bc8:1d10:4::1 51.175ms asymm 11
20: 2001:bc8:1d10:4::6 50.132ms asymm 11
21: 2001:bc8:1d10:4::1 51.262ms asymm 12
22: 2001:bc8:1d10:4::6 50.977ms asymm 11
23: 2001:bc8:1d10:4::1 51.414ms asymm 11
24: 2001:bc8:1d10:4::6 51.919ms asymm 11
25: 2001:bc8:1d10:4::1 51.293ms asymm 12
26: 2001:bc8:1d10:4::6 51.969ms asymm 11
27: 2001:bc8:1d10:4::1 52.046ms asymm 11
28: 2001:bc8:1d10:4::6 50.070ms asymm 11
29: 2001:bc8:1d10:4::1 53.301ms asymm 12
30: 2001:bc8:1d10:4::6 51.972ms asymm 11
Too many hops: pmtu 1500
Resume: pmtu 1500
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