Hi,

At one site I often work, we have the wired ethernet and the wireless
network sharing the same IP space (i.e. no routing done.)  Now to allow
seamless roaming, it would be nice to be able to tell network-manager to
just keep the IP address when going to wired to wireless and back, so any
connected services would retain the connection.

Obviously, this would fall into the category "expert configuration" - I'd
need to manually set up groups of wired and wireless networks.  I'm also
unsure about how to play nicely with the DHCP server: perhaps just change
the MAC on the new interface to be the same as that of the old one?  Or
perhaps just keep the IP a bit longer than the lease, then try to see if we
can get it from the dhcp server?  Or forge a DHCPRELEASE with the old MAC
as sender, then try to get that IP for the new interface?  Not sure if that
would even work, it's just a wacky idea...

cheers
-- vbi

You can either configure your connections manually, which means you can
choose which IP addresses you want to pick.
If IP addressess are assigned via DHCP, NM just follows what's given to him.

I don't see anything actionable remaining here, thus closing.

Michael