Circuits define physical connections to the WAN/Internet. For appliances with more than one bridge configured, you can bind each bridge to a separate circuit or you can treat all bridges as one combined circuit. Typically, when the appliance is placed in-line, one circuit would be created for each physical link.
When defining circuits, ensure each bridge is bound to a circuit; otherwise network traffic on any bridge that is not bound to a circuit, will not be affected by policy and will be monitored in a catch-all circuit.
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Version Info:
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Figure - Circuit form for versions 7.0.2 and earlier
Figure - Circuit form for versions 7.0.2 Update 1 and later
Circuits are part of the policy tree. To learn how circuits, virtual circuits, and policies work together, see Policy Tree.
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