Hi,

One of my ubuntu always have an incoming slow network speed of about
40Mbits/s (after a few hours of initial fast speed 500Mbit/s). The
speed can be rescued by running ifdown and ifup.

So I think that the problem is software related not hardware related.
I'm wondering if there is any diagnostic at a level lower than what
iperf offers to debug what cause the problem?

Thanks!

-- 
Regards,
Peng

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