Just a note.
I found out this week that the DHCP client in Linux eventually times out
trying to get a lease.  These machines won't recovery without manual
intervention unless there is a watchdog set.

On Aug 6, 2017 8:32 AM, "Dick Steffens" <d...@dicksteffens.com> wrote:

> On 08/05/2017 11:56 PM, Russell Senior wrote:
> > "Dick" == Dick Steffens <d...@dicksteffens.com> writes:
> >
> > Dick> Two times over the last three days my machine has dropped its
> > Dick> Ethernet connection. It doesn't say it's dropped, but I can't see
> > Dick> beyond the machine, not even other machines in the house. Using
> > Dick> the widget on the top bar on the Ubuntu MATE 16.04 screen I
> > Dick> manually drop and then reconnect, and all is well again.
> >
> > Dick> I've never had this happen on other machines running various
> > Dick> versions of Ubuntu. Any ideas on where to look to see why the
> > Dick> connection is dropping?
> >
> > Do you still have a dhcp lease?  That is, is there a reasonable ip
> > address attached to the interface?  Do you have a link?  When you say
> > "dropped" does that mean to anywhere?  Do you have a default route?
> Good questions. Next time it happens I'll check those. And yes,
> "dropped" does mean to anywhere. I have two other machines on my desk
> that it cannot see. They all go through the same switch to get to the
> router. I didn't check both, but I had no trouble getting out to the
> Internet with one of them.
> --
> Regards,
> Dick Steffens
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