Originally posted by: Atheus
I wouldn't just change it to 123.1 - someone else might be using that. Run 'ipconfig /all' from a command line to see what your address is now.
Why wouldn't you? It isn't like someone else is using that IP with just him and his router.
Scenario:
1 Router
1 Client
Routers IP Address is KNOWN (192.168.123.254)
Clients IP Adress in UNKNOWN. What address range could we use for this client with a standard class C subnet mask? Anywhere from 1 to 253 for the third octet.
If he were on a company network, I would agree with you 100%, but from his post, this is just an old router... Otherwise, he should have been trying another client etc... I'd be real surprised if the OP was on a company network.
Additionally, DHCP may not be working for him because perhaps in the configuration, DHCP was disabled on the router.
But... We are both just giving educated guesses at this point, because we really don't have much information and have to read between the lines and presume many things.
Whatever the case, I'd chalk this one up to not being in the same network or perhaps a dead router.