For this configuration:
An additional NIC does not need to be installed on the management server.
N1 System Manager provides two default security roles with specific privileges assigned for the restricted mode of operation. For more information, see Managing Roles in Sun N1 System Manager 1.3 Discovery and Administration Guide and Restricted Mode Capabilities in Sun N1 System Manager 1.3 Discovery and Administration Guide.
Management Server
ETH1 connects the management server to the management network and should be on the same network as the MGMT connections of the manageable servers. The management server ETH1 IP address, netmask, and gateway should be configured to enable connectivity to the manageable servers management port IP addresses. No devices other than the management server and the manageable servers should reside on the provisioning network. ETH1 should be a 1-Gbit NIC interface.
Manageable Servers
Each manageable server should provide connectivity to the management network as follows:
The management port connects the manageable server to the management network and should be on the same network as the ETH1 connection of the management server. The management port should be a 100 megabit NIC connection.