From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Rosen <jeremy.rosen@openwide.fr>
Date: Mon, 6 Oct 2014 08:49:39 +0200 (CEST)
Subject: [Buildroot] how to restart network interface automatically
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> 
> Hello,
> 
> 
> my network interface eth0 is configured to use DHCP.
> 
> 
> At boot time, init script S40network starts the network. And if DHCP
> server - for any reason - can't answer, no IP will be set for eth0.
> 
> 
> What will be the correct strategy to handle this case?
> 

IIIRC the problem is in the busybox DHCP which doesn't retry on 
failure by default, 

fortunately this is just a config option for busybox, so if you
do a make busybox-menuconfig you can change that behaviour


run "udhcpc --help" on the target to see what options are 
available

set IFUPDOWN_UDHCPC_CMD_OPTIONS to whatever fits you ned




> 
> Best regards,
> 
> 
> Sylvain
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