Adapter em0 link state changing down/up on 11.1

[Tim Daneliuk]

On 08/02/2017 01:04 PM, Ernie Luzar wrote:
> Hello List;
> 
> Running 11.1 and em0 is a Intel Pro/1000.
> I keep getting these messages
> Kernel: em0: Link state changed to Down
> Kernel: em0: Link state changed to Up
> 
> This happens 3 to 8 times during a 24 hour period.
> em0 is connected to the public internet and this down/up cycle
> disconnects all browser connections that are active.
> 
> What can I do to fix this?

I seem to recall seeing this same problem on a 9.x or 10.x system.  In
my case the fix was to replace a failed component.  For the life of
me I cannot recall whether it was the NIC, the cable, or the switch.  As
a first step, at least, I'd swap cables.  If that doesn't fix it, move
it to a different switch port - or better still, a different switch
entirely.

-- 
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Tim Daneliuk     tundra at tundraware.com
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