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Configuring port mirroring
Overview
Port mirroring copies the packets passing through a port or CPU to a port that connects to a data
monitoring device for packet analysis.
Terminology
The following terms are used in port mirroring configuration.
Mirroring source
The mirroring sources can be one or more monitored ports or CPUs. The monitored ports and CPUs
called source ports and source CPUs, respectively.
Packets passing through mirroring sources are copied to a port connecting to a data 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 a data monitoring device. Mirrored packets are sent out of the monitor port to the
data 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 groups. For more information about the mirroring groups, see "
classification and implementation
."
Reflector port, egress port, and remote probe VLAN
Reflector ports, remote probe VLANs, and egress ports are used for Layer 2 remote port mirroring.
The remote probe VLAN is a dedicated VLAN for transmitting mirrored packets to the destination
device. Both the reflector port and egress port reside on a source device and send mirrored packets
to the remote probe VLAN. For more information about the reflector port, egress port, remote probe
VLAN, and Layer 2 remote port mirroring, see "
Port mirroring classification and implementation
."
Summary of Contents for FlexNetwork 10500 SERIES
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