I you ever stumble over the error message defining the title of this blog entry:

OA> connect server 1
Invalid MP IP Address: 0.0.0.0
Operation failed.

And your EBIPA settings looks like this:

OA> show ebipa
EBIPA Device Server Settings
Bay Enabled EBIPA/Current   Netmask         Gateway         DNS             Domain
--- ------- --------------- --------------- --------------- --------------- ------
  1   Yes   192.168.101.31  255.255.255.0   0.0.0.0         192.168.101.1
            0.0.0.0                                        
...

Please don't try to reset the EBIPA settings, don't try to fail-over or restart the OA, don't try to reset the specific iLO. Good ideas, but none of these actions will give you the satisfying success you're looking for.

All you need to do is to power cycle the whole blade center. Easy, isn't it?