[Bug 1436330] Re: Network Manager doesn't set metric for local networks any more, causing connection issues

[Mathieu Trudel-Lapierre]

My understanding was that there would be packet loss all the time
without the patches applied, due to packets being sent in a round-robin
fashion between two links to the same default gateway.

This said, I'm able to reproduce the apparent "packet loss", but I say
apparent here because it seems to be an issue with ping (or, the kernel
does something special, doesn't understand packets coming in to an
interface it doesn't expect perhaps), not with the actual packets.

I've been able to observe traffic going out to my default gateway and coming back, with no interruption, using tcpdump:
sudo tcpdump -i any icmp

I don't think at this point we're working with anything different from
how it was in Trusty, but just to be on the safe side I'll test that out
to confirm we did get the same behavior.

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https://bugs.launchpad.net/bugs/1436330

Title:
  Network Manager doesn't set metric for local networks any more,
  causing connection issues

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