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Theory of Operation
DURA
stream
™
4 Theory of Operation
Modules:
The single mode or multi-mode optical module installed at the factory in each Bypass Switch has 4 ports.
The top two ports are used to connect network devices, these are the network ports and the bottom two
ports of the module direct traffic through the inline appliance, these are the appliance ports. Heartbeat
packets flow between the bottom ports to ensure the appliance is working properly. Heartbeat packets are
not passed beyond the bottom ports.
An inline appliance is connected on the single module using the following diagram:
Figure 5. DS-1010 Bypass Switching Mode and Active Switching Mode
Ports are designated as Appliance or Network Ports as shown below:
Figure 6. Network and Appliance Ports