R21xx-HP FlexFabric 11900 Network Management and Monitoring Configuration Guide

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NOTE:
• On port mirroring devices, all ports except source, destination, reflector, and egress ports are called
common ports.
• The reflector port is used to implement the support of local mirroring for multiple monitor 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 and 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."
NOTE:
The source ports/CPUs and the monitor port in a local mirroring group can be located on different cards
of a same device.
Figure 36 Local port mirroring implementation
As shown in Figure 36, the source port Ten-GigabitEthernet 1/0/1 and monitor port Ten-GigabitEthernet
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 but
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 Layer 2 and Layer 3 remote port mirroring:
• Layer 2 remote port mirroring: The mirroring source and the mirroring destination are located on
different devices on a same Layer 2 network.