Re: [lwip-users] DHCP

[Leon Woestenberg]

Hello Bill,

Bill Lawson wrote:

> Any further suggestions would be a big help, and thank you for the
> assistance you've rendered already.
OK, so your lwIP host, received an DHCP OFFER. Good. Now let's find
why lwIP does not send a REQUEST for the offered IP address.

Try to follow the program flow in DHCP.

<--DISCOVER
-->OFFER

then DHCP performs an ARP check on the offered IP address
This makes the DHCP flow more complex, it helps to disable
the DHCP_ARP_CHECK in lwipopts.h and see what happens.

Also, try to follow debug output that tells you how lwIP
handles the offer.

I do not have the source available in a minute, so I cannot
be more specific.

Regards,

Leon.

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