RE: RE : RE : [lwip-users] Finding assigned IP address of device

[Bill Auerbach]

> Piero 74 wrote:
> > but AFTER ip discovery, sw on pc have to use this ip for tcp connection.
> >
> > i think if you use cable cross between two systems which have in general
> > IP in different subnet, you cannot comunicate. I think it could works
> > only if they have the same GW... but it will be a strange situation.
> >
> > I said "but, using broadcast, the installer have to configure his laptop
> > on the same subnet of board". It means configuration necessary AFTER ip
> > discovery
> 
> But you're also going to have to configure the laptop to communicate with
> the subnet the static IP address is on too. And you're stuffed if
> 192.168.* (or whatever you're using) is already a valid subnet connected
> to the laptop.
> 
> A broadcast to 255.255.255.255 will be seen by every host on the same side
> of a gateway router, directly connected with a cross-over cable or not.
> The configured gateway for each subnet is not relevant.

I see this is more complicated than I realized - and hoped.  One thing,
somewhere it was mentioned some routers will block broadcasts.  If that's
the case, then do I need to implement more than one scheme and try both
until I get a response?

Bill