3com 2924-PWR ユーザーズマニュアル

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Configuring Port Mirroring
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Configuring Port 
Mirroring
Port mirroring monitors and mirrors network traffic by forwarding copies 
of incoming and outgoing packets from one port to a monitoring port. 
Port mirroring can be used as a diagnostic tool as well as a debugging 
feature. Port mirroring also enables switch performance monitoring.
Network administrators can configure port mirroring by selecting a 
specific port from which to copy all packets, and other ports to which the 
packets copied.
This section contains the following topics: