Re: [lwip-devel] why the board sends Gratuitous ARP always?

[Simon Goldschmidt]

 Mason wrote:

> Perhaps try setting a break point in etharp_gratuitous
> (an alias for etharp_request by default) and see who is
> calling it continuously, and under what conditions.

I just had a case where "no gateway"  was translated to "gateway = own ip", in 
which case lwIP tries to get its own ip by using ARP, which results in 
gratuitous ARP packets although etharp_gratuitous was never called.

Another problem might be that (as you wrote) that etharp_gratuitous is an alias 
to etharpt_request, so it could be hard to set a breakpoint to exactly the 
gratuitous case.


Simon