If you reboot the management server, and the N1 System Manager services do not restart, you must regenerate security keys as described in Regenerating Security Keys.
If you stop and then start the N1 System Manager and the services do not restart you must regenerate security keys as described in Regenerating Security Keys.
When the load server or load group command is used to install software on the manageable server, the manageable server's networktype attribute could be set to dhcp. This setting means that the server uses DHCP to get its provisioning network IP address. If the system reboots and obtains a different IP address than the one that was used for the agentip parameter during the load command or add server commands, then the following features may not work:
The OS Monitoring content of the show server command. (No OS monitoring)
The load server update and load group update commands
The start server command command
The set server threshold command
The set server refresh command
In this case, use the set server agentip command to correct the server's agent IP address. See To Modify the Agent IP for a Server in Sun N1 System Manager 1.3 Discovery and Administration Guide for details.