Activating network during start

[Sascha Hauer]

On Fri, Nov 21, 2014 at 09:40:01AM +0100, Holger Hans Peter Freyther wrote:
> On Fri, Nov 21, 2014 at 08:11:16AM +0100, Sascha Hauer wrote:
> 
> Good Morning,
> 
> > I don't understand what the exact problem is. So your command generally
> > works, only when it's called from the start script it doesn't work. Did
> > I get that correctly? Also a second invocation of the command then
> > works, right?
> > This sounds like the phy is not yet ready. I often get the impression
> > that the very first packet sent to the network is lost, even though the
> > phy registers tell us the phy is ready. I never found out what the
> > problem is here.
> 
>  lldp
>  sleep 2s
>  lldp
> 
> With the first "lldp" invocation the network is activated and then I
> need to sleep a bit (I don't know if 1s or less is working but with
> no wait it certainly doesn't work).
> 
> With checking the phy you refer to the call of eth_carrier_check that
> is used by eth_send?

Yes.

You could try if one of the other network commands like 'ping' work
right after startup.

Sascha

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |