We had a problem with our server last week (Power supply), After fixing it the server is not getting connected to its static ip anymore.
I tried both methods (1) Using Interfaces (2) Using Network Manager
In both cases it gets connected, however it cannot ping any ip.
Since I cannot post more than 2 links ...
Here is the link to the album http://imgur.com/a/1ECiN in which the following commands are bottom to top.
Network manager trial settings
However, the ping always fails
I removed dhcp3-client just to see if it was interfering, did not work.