5. Deploy a Sensor in inline fail-open mode

To configure a fail-open switch you must configure the port pair to operate as an inline fail-open port.

1. After cabling the Sensor and the fail-open switch, log on to your Manager.
2. Go to Devices → <Admin Domain Name> → Devices → <Device_Name> → Setup → Physical Ports.
3. Double-click port 1A.
   A configuration window appears on the right side of the window.
4. Click the State drop-down and select Enabled.
   This enables port 1A-1B.
5. Select the Auto Negotiate checkbox and make sure the Speed (Duplex) is set to 1 Gbps (Full).

   In case of the 4-port RJ-45 module, the maximum Speed (duplex) can be set to 10 Gbps (Full). When you set the Speed (duplex) to 10 Gbps (Full), the link will come up only when the Auto Negotiate option is ON. To this effect, the Auto Negotiate checkbox automatically gets selected and disabling the Auto Negotiate option is not allowed.

6. Click the Mode drop-down and select Inline Fail Open – Active.
   This means port pair 1A-1B is now configured for inline fail-open.
7. Click the Placement drop-down and select Inside Network or Outside Network, depending on how you want to configure your ports.
   Placement refers to the area of the network which that individual port is connected.
8. Click the Response Port drop-down and select the right port that you want to assign.
   For an inline fail-open or fail-closed setup, you can configure the same port to be the response port.
9. Click Save.

If traffic is passing through the ports, you will notice the port link status changes to Up and goes green.