[lwip-users] How to renew DHCP

[Alain Mouette]

when using DHCP I call netifapi_dhcp_start() ant poll netif_is_up() 
until the interface is up.

after some long time, if no connection can be made, I want to start DHCP 
again (maybe the cable was diconnected and connected to another 
network), what should be the correct procedure?

Should I jusr call netif_set_down() and start dhcp again? Will DHCP 
renew itself after some timeout?

Sorry, but I could no find a clear doc about this...

Thanks,
Alain