For the past 3 days I’ve not been able to reach Fastly hosted sites over IPv6 from Vodafone UK broadband (AS5378) [2a0a:ef40::/29]. This had worked fine for the 11 months I’ve had the Vodafone service.
IPv4 is working fine.
I’m still trying to reach Vodafone support but that is challenge (sigh).
These fail to respond:
ipv6.reddit. com → dualstack.reddit.map.fastly. net [2a04:4e42:2d::396]
open.spotify. com → atc.spotify.map.fastly. net [2a04:4e42:82::810]
www.xkcd. com → [2a04:4e42:400::67]
I noticed that mastodon.social is hit and miss, I see it has 8 IPv6 address in DNS and half of them work:
Working:
2a04:4e42:e00::347
2a04:4e42:c00::347
2a04:4e42:a00::347
2a04:4e42:800::347
Unreachable:
2a04:4e42:200::347
2a04:4e42::347
2a04:4e42:600::347
2a04:4e42:400::347
Failure example:
tracert ipv6.reddit. com
Tracing route to dualstack.reddit.map.fastly. net [2a04:4e42:82::396]
over a maximum of 30 hops:
1 4 ms 3 ms 3 ms 2a0a:ef40:31:
2 10 ms 8 ms 7 ms 2a0a:ef40:ffff:a::1
3 20 ms * 15 ms 2a0a:ef40:fffe:20a::1
4 * * * Request timed out.
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
Success example:
Tracing route to 2a04:4e42:c00::347 over a maximum of 30 hops
1 4 ms 4 ms 4 ms 2a0a:ef40:31:
2 9 ms 8 ms 9 ms 2a0a:ef40:ffff:a::1
3 * * * Request timed out.
4 16 ms 10 ms 12 ms ae21.edge7.lon1.sp.lumen.tech [2001:1900:5:3::1d]
5 15 ms 11 ms 9 ms system.0.ear2.London1.level3.net [2001:4c08::6c]
6 13 ms 11 ms 12 ms 2001:1900:2100::58c2
7 13 ms 11 ms 11 ms 2a04:4e42:c00::347
(exuse the spaces in some of the host names, the forum wouldn’t let me post URLs)