Christopher Follett wrote:There the routers we have, it must be an ISP thing.
The ISP shouldn't be involved. The router just passes along an assigned IP address with itself as the gateway and net-mask as a simplification. I have a DG834G and it has been fine. But that is with my A1 and built in Ethernet.
Could it be your broadband router setup? These could differ. Mine uses standard DHCP on server side and NATs between router and outside world AFAICT. Could your ISP address be static or router be bridged to ISP in a different mode?
What happens if you unplug the router from the Internet? Can DHCP work then? Can other machines work with DHCP either way or is it just an OS4 problem?
A friend was also having this trouble with his router, an Asus 500-Wl with DD-WRT firmware. There was a discussion with Olaf about it and it was found some DHCP servers in routers don't adhere to the DHCP protocol. As long as Windows works they aren't concerned. So workarounds were put into Roadshow to get around the problem. And AFAK they had helped. Being the X1000 has update 5 it should be working better.
Perhaps enable debug mode for DHCP and send the log to Olaf with module versions. I think it would be good to diagnose these problems and get as much hardware working with OS4 as possible as it should be.