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HP 5920 Configuration Manual: Port Mirroring Classification And Implementation

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Reflector port, egress port, and remote probe VLAN
A reflector port, remote probe VLAN, and an egress port are used for Layer 2 remote port mirroring. The
remote probe VLAN specially transmits 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
NOTE:
On port mirroring devices, all ports except source, destination, reflector, and egress ports are called
common ports.

Port mirroring classification and implementation

Port mirroring includes local port mirroring and remote port mirroring depends on whether the mirroring
source and the mirroring destination are on the same device.
Local port mirroring
In local port mirroring, the source device is directly connected to the data monitoring device. It can act
as the destination device to forward mirrored packets to the data monitoring device. The mirroring source
and mirroring destination are on the same device. A mirroring group that contains the mirroring source
and the mirroring destination on the device is called a local mirroring group.
Figure 59 Local port mirroring implementation
As shown in
1/0/2 reside on the same device. Packets received on Ten-GigabitEthernet 1/0/1 are copied to
Ten-GigabitEthernet 1/0/2, which then forwards the packets to the data monitoring device for analysis.
Remote port mirroring
In remote port mirroring, the source device is not directly connected to the data monitoring device.
However, it copies mirrored packets to the destination device, which forwards them to the data
monitoring device. The mirroring source and the mirroring destination reside on different devices and in
different mirroring groups. The mirroring group that contains the mirroring source or the mirroring
destination is called a remote source group or remote destination group, respectively. The devices
between the source devices and destination device are intermediate devices.
Remote port mirroring includes the following types:
"Port mirroring classification and
Figure
59, the source port Ten-GigabitEthernet 1/0/1 and monitor port Ten-GigabitEthernet
implementation."
173

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