H3C Technologies H3C SR8800 - Manual (Page 133)

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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. The
egress port must belong to the remote probe VLAN while the reflector port may not. For more information
about the source device, destination device, reflector port, egress port, and remote probe VLAN, see
“ Port mirroring classification and implementation .”
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.
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.
Figure 45 Local port mirroring implementation
As shown in Figure 45 , the source port GigabitEthernet 3/1/1 and monitor port GigabitEthernet 3/1/2
reside on the same device. Packets of GigabitEthernet 3/1/1 are copied to GigabitEthernet 3/1/2,
which then forwards the packets to the data monitoring device for analysis.
Remote port mirroring
In remote port mirroring, 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/destination group. The devices between the source devices and
destination device are intermediate devices.
Remote port mirroring falls into Layer 2 and Layer 3 remote port mirroring.
• Layer 2 remote port mirroring—In Layer 2 remote port mirroring, the mirroring source and the
mirroring destination are located on different devices on a same Layer 2 network.
• Layer 3 remote port mirroring—In Layer 3 remote port mirroring, the mirroring source and the
mirroring destination are separated by IP networks. The router does not support Layer 3 remote port
mirroring.