Many months ago I added a new host name, ducks.myweb.com, in the Hostnames and Addresses panel on SME 6.0.1, with updates. At the time I assigned an IP of 192.168.181.10 the machine and updated the Hostnames and Addresses panel. All worked fine.
A couple of weeks ago I retired that machine and reset the host name IP to a new box with an IP of 192.168.181.13 for its wireless card. After waiting for the DNS to catch up, the host name URL worked fine.
Once the testing was completed, I enabled the EtherNet card in the new machine and assigned it a third IP 192.168.181.12. I modifed the IP address in the Hostnames and Addresses panel, leaving the host name the same.
Now, URL's with the name, ducks.myweb.com, fail on a "no route to host" error, while using the IP address works fine.
What I have overlooked?