From AWS us-east-2 where the CI runners are located:
# mtr --report-wide --show-ips --aslookup --mpls keyserver.ubuntu.com
Start: 2025-08-30T11:32:29+0000
HOST: admin-server Loss%
Snt Last Avg Best Wrst StDev
1. AS??? 100.91.29.131 0.0%
10 12.7 10.4 9.9 12.7 0.8
2. AS??? 240.1.248.13 0.0%
10 9.2 9.2 9.1 9.3 0.0
3. AS??? 242.5.18.3 0.0%
10 9.4 10.7 8.8 24.5 4.9
4. AS??? 150.222.212.136 0.0%
10 9.0 9.4 9.0 9.9 0.3
5. AS??? as6939.equinix-chicago.core3.chi1.he.net (208.115.136.37) 80.0%
10 9.4 9.5 9.4 9.7 0.2
6. AS6939 port-channel4.core2.nyc4.he.net (184.105.64.177) 30.0%
10 23.4 23.5 23.4 23.6 0.1
7. AS6939 port-channel3.core3.lon2.he.net (184.105.81.42) 70.0%
10 100.5 95.8 93.2 100.5 4.1
8. AS6939 100ge0-35.core1.lon6.he.net (184.104.196.165) 0.0%
10 92.6 92.6 92.4 92.7 0.1
9. AS6939 swp9.il3-core1.canonical.com (216.66.93.14) 0.0%
10 90.1 90.1 90.1 90.2 0.0
10. AS41231 keyserver.ubuntu.com (185.125.188.27) 0.0%
10 89.0 89.1 88.9 89.9 0.3
That's very interesting to see "70%" and "80%" loss at certain points.
# ip route get $(dig +short keyserver.ubuntu.com | head -n 1)
185.125.188.26 via 172.31.16.1 dev ens5 src 172.31.19.160 uid 0
cache
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https://bugs.launchpad.net/bugs/2121151
Title:
keyserver.ubuntu.com sporadically unreachable
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