Interface numbering

The interfaces have their own numbering in the SMC called interface ID. The interface IDs are mapped to the corresponding network interfaces on the engine when you configure the Forcepoint NGFW software.

Table 1. Interface numbering for NGFW Engines
Interface type	Interface numbering in the SMC
Layer 3 physical interface (NGFW Engines in the Firewall/VPN role)	Each physical interface has a unique interface ID number in the SMC.
Layer 2 physical interface (NGFW Engines in the Firewall/VPN role)
Physical interface (NGFW Engines in the IPS and Layer 2 Firewall roles)
VLAN interface	Each VLAN interface has a VLAN number in the SMC. The defined VLAN interfaces are displayed, for example, as “5.202” for network interface 5 with VLAN 202.
ADSL interface (Legacy Forcepoint NGFW appliances only)	Each ADSL interface has a unique interface ID number in the SMC.
Wireless interface	The wireless interface has a unique interface ID number in the SMC. An SSID (service set identifier) interface represents an 802.11 wireless LAN. You can add several SSID interfaces to the wireless interface.
Modem interface	Modem Interfaces are identified with modem numbers in the SMC. The modem number is mapped to the modem’s IMEI (international mobile equipment identity) number. Each modem is assigned a unique ID when you connect the modem to the engine. You can change the mapping between the modem’s IMEI number and the modem ID through the engine command line, if necessary.
Tunnel interface	Tunnel interfaces are numbered with tunnel interface ID numbers. The mapping of Tunnel Interfaces to physical network interfaces on the engine is done automatically by the engine operating system based on the routing configuration.
Integrated switch	Integrated switches are identified with switch IDs in the SMC. Integrated switches have predefined switch IDs. For example, the switch ID is 0 on Forcepoint NGFW 110 appliances. You can add port group interfaces to switches. Port group interfaces are identified by port group IDs. The defined switches and port group interfaces are displayed, for example, as 0.1 for switch ID 0 with port group 1.