Meaning of port mirroring for the USG6000 series

To locate network problems by capturing and analyzing session packets without interrupting services, you should configure port mirroring.
Port mirroring copies packets on the specified service interface to a non-service interface. When a session is abnormal, you can locate the fault by viewing the protocol analyzer connected to the non-service interface without affecting services. The service interface is known as the mirroring port and the non-service interface known as the observing port.

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