Re: [lwip-users] link down handling in dhcp v1.4.1

[address@hidden]

Am 06.11.2019 um 15:16 schrieb vinu:
> Hi all,
>
> I have come across an issue related to DHCP and link status.
>
> The device does not restart the dhcp negotiation whenever the link goes down
> and up automatically. Note that I have an interrupt callback for PHY link
> up/down.
>
> How should the dhcp be handled when the link up/down event occurs? I have
> seen many posts regarding the same, but i just wanted to make sure that we
> are doing this in the correct way. Please help.

Make sure you get from the PHY interrupt into tcpip_thread and call
dhcp_network_changed() from there. That should be all.

Regards,
Simon

> I just read that dhcp_network_changed() shall be used in case the lease time
> has not expired and dhcp_start shall be used if the dhcp server
> changes/reboots. Please correct me if i am wrong.
>
> regards,
> Vinu
>
>
>
> --
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>
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