After you have secured the fail-open switch in its rack, use copper or fiber connecting cables to connect the switch with the Sensor. The underlying principle in connecting these cables is to connect the Sensor and the switch such that traffic gets routed through the fail-open switch in case of a Sensor outage.
Regardless of the Sensor and fail-open kit models, the connections remain the same. The only difference between the connections for the active and the passive fail-open kits is that you must connect the switch to the Sensor control ports in a passive fail-open deployment.
If you are using a fail-open kit, you will require four cables in all.
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If you are using a passive fail-open kit, you will require five cables. One of these cables is the RJ-45 to RJ-11 cable which is used to connect the Console port in the fail-open switch with the Monitor port in the Sensor.
You require the RS-232 cable and RJ-45 cable if you plan to configure the SNMP manager.
If you are connecting a passive fail-open switch, connect the RJ-45 connector of the Control cable to the Control port of the fail-open switch and the RJ-11 connector of the Control cable to a Control port on the Sensor (X1 in the illustration). If you are connecting a fail-open switch, proceed to step 3.
This cable is used to transport control signals from the Sensor to the fail-open switch. When the fail-open switch does not receive four consecutive control signals (about 4 seconds), it changes to bypass mode.
Note
Each Sensor Control port is used in conjunction with a corresponding port pair.
Connect the GBIC port or RJ-45 port on your network device to Network port A (passive)/ Net0 (active) of the fail-open switch.
Insert SFP, SFP+, or RJ-45 (depending on your Sensor model) into each of the slots of one of the unused port pairs on your Sensor. We will use port pair G0/1-G0/2 for this illustration.
Connect Monitor port A (passive) / Mon0 (active) on the fail-open switch to port G0/1 on the Sensor.
Connect Monitor port B (passive) / Mon1 (active) on the fail-open switch to port G0/2 on the Sensor.
Connect the network device that carries traffic into the network to Network port B (passive) / Net1 (active) on the fail-open switch.
This completes the connections between the Sensor and fail-open switch. The link lights may not come on as yet if the Sensor has not yet been deployed inline.