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

[Jonathan Larmour]

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.

Jifl

> 2008/2/21, Frédéric BERNON <address@hidden 
> <mailto:address@hidden>>:
>
> > but, using broadcast, the installer have to configure his laptop on
>     the same subnet of board.
>      
>     Why??? You can broadcast on 255.255.255.255
>     <http://255.255.255.255>, so, the installer doesn't have to be on
>     the same subnet. Of course, your device should also reply on
>     255.255.255.255 <http://255.255.255.255>
[snip]

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