nanog mailing list archives

Re: Need Comcast IPv6 routing assistance please


From: Nick Hilliard <nick () foobar org>
Date: Mon, 23 May 2016 19:50:01 +0100

David Sotnick wrote:
I'm seeing *consistent* 46.1% packet loss between Comcast Res/Bus services
in Northern CA and Pixar (Level 3 customer) also in Northern CA. I have
ticket open with Level (3) but the problem appears to be on Comcast's
network.

5/12 = 41.6%

Someone's got a 12-way LAG / ECMP path with either 5 links broken or
else with a hashing algorithm which is dumping your packets into one or
more broken paths 5/12 of the time.

Nick


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