[En-Nut-Discussion] NutNetIfConfig

[Harald Kipp]

Hello Gerd,

first, it is not possible to change the IP address while
socket connections are established. This isn't Ethernut
specific. On PCs the interface must be switched down and
up again with the new IP.

However, Nut/OS doesn't provide an interface shutdown, so
a reboot is required. The problems regarding DHCP are
described partly in
http://www.ethernut.de/pdf/enswm20e.pdf
Page 33 ff.

Harald




>Hi all,
>
>I want to deliver a ethernut to our customers without an IP. I read
>about the icmp-method to deliver an ip-address to the ethernut. So I
>wonder if following is possible:
>
>1. try dhcp
>1a if dhcp is not active use icmp-method
>2. run with new ip.
>
>Than I want to be able to change the ip during runing, or restore the
>icmp-method. Is it possible to use NutNetIfConfig while a socket is
>open? Will it switch to the new ip immediatly? Or does the ethernut
>device need a reboot?
>
>Has anybody any example sources for starting ip-less and changing ip
>during runing?
>
>Thanks
>
>Gerd
>
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