H3C Technologies H3C S6300 Series Switches - Manual (Page 178)

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Configuring port mirroring
The port mirroring feature is available only on Layer 2 Ethernet interfaces.
Overview
Port mirroring copies the packets passing through a port to the monitor port that connects to a monitoring
device for packet analysis.
Terminology
The following terms are used in port mirroring configuration.
Mirroring source
The mirroring source can be one or more monitored ports, which are called source ports.
Packets passing through source ports are copied to a port connecting to a monitoring device for packet
analysis. The copies are called mirrored packets.
Source device
The device where the mirroring sources reside is called a source device.
Mirroring destination
The mirroring destination is the destination port, also known as the monitor port, of mirrored packets and
connects to the monitoring device. Mirrored packets are sent out of the monitor port to the monitoring
device.
A monitor port might receive multiple copies of a packet when it monitors multiple mirroring sources. For
example, two copies of a packet are received on Port 1 when the following conditions exist:
• Port 1 is monitoring bidirectional traffic of Port 2 and Port 3 on the same device.
• The packet travels from Port 2 to Port 3.
Destination device
The device where the monitor port resides is called the destination device.
Mirroring direction
The mirroring direction specifies the direction of the traffic that is copied on a mirroring source.
• Inbound—Copies packets received.
• Outbound—Copies packets sent.
• Bidirectional—Copies packets received and sent.
Mirroring group
Port mirroring is implemented through mirroring groups, which include local, remote source, and remote
destination mirroring groups. For more information about the mirroring groups, see "
Port mirroring
classification and implementation ."