While configuring failover for a stack, you need to take the following factors into consideration:
Both the stacks must be identical to each other with identical connections, network modules, and capacity.
Ensure you have the correct license to configure failover for a stack. The licenses required are as follows:
Capacity
No of Sensors
Number of License SKUs
40 Gbps
2 * 2 NS9500 Sensors
FO95X40CAE-AT
60 Gbps
2 * 2 NS9500 Sensors
FO95X60CAE-AT
100 Gbps
2 * 4 NS9500 Sensors
FO95X100CAE-AT
You can use 2-port QSFP28 interface module, or 2-port QSFP+ interface module or 4-port QSFP+ interface module for Sensor failover.
Port G1/1 is used for failover. G1/2 is unusable. For 4-port interface module, ports G1/3 and G1/4 can be used as monitoring ports.
You need to purchase separate Direct Attach Copper (DAC) cables for failover.
The supported DAC cable length for the failover is 3 meters. It is recommended that the stack configuration is installed within one rack. If the stack is configured in multiple racks, you will need to use the QSFP+ SR fiber transceiver modules.
Note
In the event of node failure in a stack, the remaining nodes will continue to function and a fault is generated in the System Faults page in the Manager.