Operation Manual – Port MirroringH3C S7500E Series Ethernet Switches Chapter 1 Port Mirroring Configuration1-21.1.2 Implementing Port MirroringPort mirroring is implemented through port mirroring groups, which fall into these threecategories: local port mirroring group, remote source port mirroring group, and remotedestination port mirroring group. Two port mirroring implementation modes areintroduced in the following section.I. Local port mirroringLocal port mirroring is implemented by local port mirroring group.In this mode, the source ports and the destination port are in the same local portmirroring group. Packets passing through the source ports are duplicated and then areforwarded to the destination port.II. Remote port mirroringRemote port mirroring is achieved through the cooperation of remote source portmirroring group and remote destination port mirroring group.Figure 1-2 illustrates a remote port mirroring implementation.Figure 1-2 A remote mirroring implementationThe devices in Figure 1-2 function as follows:z Source deviceSource device contains source mirroring ports, and remote source port mirroringgroups are created on source devices. A source device duplicates the packets passingthe source ports on it and sends them to the outbound port. The packets are thenbroadcast in the remote mirroring VLAN and are received by the intermediate device ordestination device.z Intermediate deviceIntermediate devices are used to connect source devices and destination devices. Anintermediate device forwards the mirrored packets to the next intermediate device orthe destination device. If the source device is directly connected to the destinationdevice, no intermediate device is needed. In a remote mirroring VLAN, the sourcedevices and the destination device need to be able to communicate with one anotheron Layer 2.
