[dns-operations] azure-dns / edge-global.plcm.vc resolution problems

Thomas Mieslinger miesi at mail.com
Wed Oct 13 09:31:03 UTC 2021


Dear List Members,

I'd like your advice on my dns resolution problems for

edge-global.plcm.vc/A

When I can successfully resolve it is 1392byte / 84 A  or a 1216bytes /
73 A Records answer.

But 50% of the requests get SERVFAILs or self referrals (testing from
AS8560).

Testing from outside AS 8560 with RIPE atlas (see
https://atlas.ripe.net/measurements/32509300) looks the same.

Using Quad1/8/9 I see these services needing sometimes >2000ms to
generate the answer.

Thanks

Thomas



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