[Buildroot] how to restart network interface automatically

Jeremy Rosen jeremy.rosen at openwide.fr
Mon Oct 6 06:49:39 UTC 2014


> 
> 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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