Daisy chaining the Belkin F1DN116C-3 and F1DN108C-3 KVM Switches

The Belkin Advanced Secure KVM Switches offer superior security and data protection by providing true data path isolation between systems and networks.  They are fully compatible with legacy and new government systems and are certified to the latest NIAP cyber security requirements, PP3.0.  This article describes a convenient method to expand the capacity of Belkin’s 8- and 16-port SKVM switches, the F1DN108x-3 and F1DN116x-3 to interconnect more than 16 systems and networks by daisy chaining the SKVMs. 

To daisy chain the F1DN108x-3 and F1DN116x-3, follow these options:
  1. Connect the USB and video cables from the console of F1DN108x-3 to Channel 16 on the F1DN116C-3. 
  2. Connect the USB and video cables from the console of F1DN116x-3 to Channel 8 on the F1DN108x-3.
For this configuration, the following functionality would be achieved:
  • Console monitor, mouse, and keyboard will be functional for computers connected to either KVMs
  • A Common Access Card (CAC) reader may be recognized by computers connected to the two (2) KVMs as long as all CAC switches are enabled.
NOTE:  It is most important for channel-16’s CAC switch to be enabled with configuration, and for channel-8’s CAC switch to be enabled with configuration.  If these CAC switches are disabled, the CAC LEDs of the secondary/cascaded KVM will give a false-positive (ON) indication while the connected computers did not actually have access to the CAC reader.
  • A Belkin Advanced Secure LCD Desktop Controller, F1DN003R could be connected to either KVM, but it can only control the channels of the KVM which it is physically connected to.
  • This configuration will only allow control of 23 or 35 computers as the 24th (36th) channel will be used as the daisy chain channel. 

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