Re: [gentoo-user] Strange network behaviour: NIC goes down, DHCP lease renewal fails

[Marc Joliet <marcec@gmx.de>]

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Am Thu, 5 Mar 2015 13:33:23 -0500
schrieb Todd Goodman <tsg@bonedaddy.net>:

> * Marc Joliet <marcec@gmx.de> [150305 04:47]:
> [..SNIP..]
> > 1.) The NIC is brought up (some built-in Intel model).
> > 
> > 2.) A DHCP client configures it.
> > 
> > 3.) The network connection is lost at some point (the amount of time this takes
> >     varies, but it can be as little as 20 minutes).
> > 
> > 4.) Eventually the lease runs out and the DHCP client tries to renew it, but
> >     gets no response.  Sometimes, after many hours (at least 6), it will get a
> >     DHCPACK, but that's it.  One of our sysadmins says that not only does
> >     the DHCP server never see the packets, but the managed switch that the PC
> >     is directly attached to *also* never does (again, except for when the
> >     occasional DHCPACK comes).
> > 
> > 4.) Restart the network device.  A reboot is not required, but it is necessary
> >     to terminate the DHCP client.  After that everything works again.
> > 
> > 5.) GOTO 3.
> [..SNIP..]
> 
> Is this a WiFi NIC?

Nope, it's wired.

> Is it possible the device is powering down?

I mentioned the possibility, but don't find it *that* credible, since three
different PCs (with different NICs) have shown the problem.  Plus, sometimes the
one affected PC I work on can still reach the internet (i.e., a browser works),
even though it has already ceased to be reachable.

[...]

-- 
Marc Joliet
--
"People who think they know everything really annoy those of us who know we
don't" - Bjarne Stroustrup

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