85NOTE:The reflector port is used to enable local mirroring to support multiple monitor ports.Port mirroring classification and implementationAccording to the locations of the mirroring source and the mirroring destination, port mirroring falls intolocal port mirroring and remote port mirroring.Local port mirroringIn local port mirroring, the mirroring source and the mirroring destination are on the same device. Amirroring group that contains the mirroring source and the mirroring destination on the device is calleda “local mirroring group”.Figure 32 Local port mirroring implementationAs shown in Figure 32, the source port Ethernet 1/0/1 and monitor port Ethernet 1/0/2 reside on thesame device. Packets of Ethernet 1/0/1 are copied to Ethernet 1/0/2, which then forwards the packetsto the data monitoring device for analysis.Remote port mirroringIn remote port mirroring, the mirroring source and the mirroring destination reside on different devicesand in different mirroring groups. The mirroring group that contains the mirroring source or the mirroringdestination is called a “remote source/destination group”. The devices between the source devices anddestination 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 themirroring destination are located on different devices on the same Layer 2 network.• Layer 3 remote port mirroring: In Layer 3 remote port mirroring, the mirroring source and themirroring destination are separated by IP networks.1. Layer 2 remote port mirroring
