Re: [lwip-users] dhcp_release_and_stop() clears the assigned IP address

[R. Diez]

> [...]

> No, a private scanning tool using broadcasts...

By private you mean not open sourced here?

In any case, how can this tool help? If the device is not getting any IP 
address over DHCP, and they do not have any fall-back IP, then they are not 
reachable. Or do you mean the devices reset their IP address when they receive 
a particular? That does not seem very robust. How do you implement security 
then? And the users needs a custom tool, because I assume that this is not a 
standard solution.



> What fallback IP is that?
> [...]


The user enters an appropriate fall-back IP during device commissioning, next 
to the "enable DHCP" option. No need to panic or assume anything nasty.


Even if all devices have the same fall-back IP, that does not really matter, as 
long as it is on a different subnet or it is a reserved IP for that purpose. 
Networks should still operate correctly if a client device IP is duplicated. If 
the DHCP server is down, and the devices need it, you have bigger problems 
anyway. The fall-back IP is mainly designed so that you can easily isolate a 
device and access it with a minimum of fuss.


Regards,
  rdiez