H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 72)

59
Port mirroring configuration
Introduction to port mirroring
Port mirroring refers to the process of copying the packets passing through a port to the monitor port
connecting to a monitoring device for packet analysis.
Terminologies of port mirroring
Mirroring source
The mirroring source can be one or more monitored ports, called source ports, and the device where the
ports resides is called a "source device". Packets (called "mirrored packets") passing through them are
copied to a port connecting to a monitoring device for packet analysis.
Mirroring destination
The mirroring destination is the destination port (also known as the monitor port) of mirrored packets and
connects to the data monitoring device. The device where the monitor port resides is called the
"destination device". The monitor port forwards mirrored packets to its connecting monitoring device.
NOTE:
A monitor port may receive multiple duplicates of a packet in some cases because it can monitor multiple
mirroring sources. For example, assume that Port 1 is monitoring bidirectional traffic on Port 2 and Port 3
on the same device. If a packet travels from Port 2 to Port 3, two duplicates of the packet will be received
on Port 1.
Mirroring direction
The mirroring direction indicates that the inbound, outbound, or bidirectional traffic can be copied on a
mirroring source.
• Inbound: Copies packets received on a mirroring source.
• Outbound: Copies packets sent out a mirroring source.
• Bidirectional: Copies packets both received and sent on a mirroring source.
Port mirroring classification and implementation
According to the locations of the mirroring source and the mirroring destination, port mirroring falls into
local port mirroring and remote port mirroring.
NOTE:
The switching engine on a WX3000E wireless switch only supports local port mirroring.
In local port mirroring, the mirroring source and the 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."