Need Comcast IPv6 routing assistance please

Nick Hilliard nick at
Mon May 23 18:50:01 UTC 2016

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.


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