Implementing Port Mirroring - H3C S5500-EI series Operation Manual

Operation Manual – Port Mirroring
H3C S5500-EI Series Ethernet Switches

1.1.2 Implementing Port Mirroring

Port mirroring is implemented through port mirroring groups, which fall into these three
categories: local port mirroring group, remote source port mirroring group, and remote
destination port mirroring group. Two port mirroring implementation modes are
introduced in the following section.
I. Local port mirroring
Local port mirroring is implemented by local port mirroring group.
In this mode, the source ports and the destination port are in the same local port
mirroring group. Packets passing through the source ports are duplicated and then
forwarded to the destination port.
II. Remote port mirroring
Remote port mirroring is achieved through the cooperation of remote source port
mirroring group and remote destination port mirroring group.
Figure 1-2
Figure 1-2 A remote mirroring implementation
The devices in
Source device
Source device contains source mirroring ports, and remote source port mirroring
groups are created on source devices. A source device duplicates the packets passing
the source ports on it and sends them to the outbound port. The packets are then
broadcast in the remote mirroring VLAN and are received by the intermediate device or
destination device.
Intermediate device
Intermediate devices are used to connect source devices and destination devices. An
intermediate device forwards the mirrored packets to the next intermediate device or
the destination device. If the source device is directly connected to the destination
device, no intermediate device is needed. In a remote mirroring VLAN, the source
devices and the destination device need to be able to communicate with one another
on Layer 2.
illustrates a remote port mirroring implementation.
Figure 1-2 function as follows:
Chapter 1 Port Mirroring Configuration
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