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Re: [lwip-users] DHCP issue

From: Simon Goldschmidt
Subject: Re: [lwip-users] DHCP issue
Date: Tue, 8 Nov 2011 18:07:40 +0100

 Arik Ramon <address@hidden> wrote:

I noticed that if I start the task while the LAN cable is connected I get IP address, but when I start the program when the LAN cable is disconnected and after a while I re-connect it, I do not get IP address. Looking at LAN analyzer shows that no DHCP request are issued.

Any idea how can it be solved?

Yes. From your netif driver, call netif_set_link_up and netif_set_link_down to notify lwIP of the link state. When the lwIP internal link state changes from down to up, DHCP is restarted.


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