You may have been tripped up by DHCP.
A typical home network is set up so that all of the network
clients--desktops, laptops, tablets and printers--get their ip address
from a router. This is convenient, as the router can make sure to avoid
conflicts in those addresses.
Unfortunately, some printer drivers are not terribly savvy about finding
a network printer. They just assume it will be at the same ip address
where the first saw it, during installation.
I have tried to change the IP address with the
"Wan" address (that I assume is what you mean) but
no luck. I use the iinet modem as a network hub.
I have tried reinstalling the printer software
"Samsung CLX6210 FX" but this "cannot find" a
network printer; and then refuses to accept a
manual entry IP address.
I am getting the Printer serviced (long overdue)
tomorrow an I specified a serviceman who knows how
to configure the thing.
In the mean time I got it working via the USB
option. I prefer the network attachment because
the printer is far away in the next room.
Some routers are pretty good about trying to hand out the same ip
address to the same device, some are not. If you replace a router, it
won't have any of that historical knowledge *and* may well hand out ip
addresses in a different range.
My IP service provider "Netspace" has been taken
over by "Iinet", and now there's a "call centre"
with Asian women with austere unintelligible
voices who are too specific with their advice and
know nothing about networks and printers.
Look at whatever utilities might have been installed with your printer
driver. There maybe a "Reassign IP Address" utility, or command in one
of those utilities.
If nothing else, you can probably uninstall/reinstall the printer driver
again.
Didn't work.