The primary network interface is used to create virtual interfaces (e.g., eth0, eth1:0, eth1:1, etc.) for agents configured to run on separate IPs. The interface must be created, and be up before the simulator starts, and have a static (public or private) IP address.
Nextian SNMP Agent Simulator supports only one primary interface.
The primary interface is configured in the simulator.conf file located in:
Windows %SYSTEMROOT%\etc\nextian.d\simulator.conf
Linux /etc/nextian.d/simulator.conf
By default, the installer configures the first LAN interface as the primary interface, e.g.:
PRIMARY_INTERFACE='eth0'