There is no loss that persists through to the endpoint in that trace. This is standard control plane rate limiting at intermediate hops. https://archive.nanog.org/meetings/nanog47/presentations/Sunday/RAS_Tracerou... On Tue, Apr 18, 2023, 12:56 Paul Ebersman via Outages <outages@outages.org> wrote:

I'm seeing heavy packet loss within DEN metro for comcast on ipv6 (but not ipv4).

mtr to my mail host follows. packet loss the same hop for any site on the internet i try to reach via ipv6.

anyone else seeing issues?

HOST: localhost. Loss% Snt Last Avg Best Wrst StDev 1.|-- xxxxxxxxxxxxxxxxx 0.0% 10 4.1 4.8 2.5 12.9 2.9 2.|-- xxxxxxxxxxxxxxxxx 0.0% 10 14.2 15.4 13.1 20.2 2.2 3.|-- ae-251-1203-rur01.monument.co.denver.comcast.net 0.0% 10 15.9 20.7 13.2 36.0 8.2 4.|-- ae-12-ar01.denver.co.denver.comcast.net 0.0% 10 23.5 20.6 14.9 32.9 5.4 5.|-- 2001:558:1c0:1058::1 40.0% 10 15.4 18.1 14.8 27.3 4.8 6.|-- be-36031-cs03.1601milehigh.co.ibone.comcast.net 90.0% 10 15.8 15.8 15.8 15.8 0.0 7.|-- be-1314-cr14.1601milehigh.co.ibone.comcast.net 40.0% 10 17.8 17.2 16.1 17.8 0.6 8.|-- be-303-cr14.champa.co.ibone.comcast.net 70.0% 10 18.9 21.1 18.4 26.0 4.2 9.|-- be-1214-cs02.champa.co.ibone.comcast.net 60.0% 10 16.8 17.3 16.7 17.8 0.6 10.|-- be-1212-cr12.champa.co.ibone.comcast.net 30.0% 10 17.2 19.4 15.7 25.5 3.3 11.|-- be-301-cr11.sunnyvale.ca.ibone.comcast.net 0.0% 10 42.2 42.1 39.6 43.8 1.3 12.|-- ??? 100.0 10 0.0 0.0 0.0 0.0 0.0 13.|-- be-3202-pe02.529bryant.ca.ibone.comcast.net 0.0% 10 42.6 43.4 40.7 48.3 2.3 14.|-- 2001:559::14e 0.0% 10 42.7 43.5 41.3 48.8 2.1 15.|-- mail.dragon.net 0.0% 10 42.1 42.7 40.7 47.5 1.9

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