Hi AllThis is NOT specifically related to CentOS per se. I have 2 servers that are on two networks. I did NOT set this up. The NIC went bad and it has been replaced. I knew enough to update the HW address in the ifcfg-* files. The network service restarts successfully without errors. However I cannot connect via ping or ssh with the pt2pt network setup on 192.168.x.*. When I use our internal network ip addresses it is fine. I am not sure how to troubleshoot this separate connection. What can I provide here that will allow someone to help? Thanks in advance. I tried searching a bit but didn't find anything of use so far. KM