Huawei AR150 series - Remote Port Mirroring

Local Mirroring Specifications
On the AR150/200 configured with local mirroring, only one observing interface can be
configured. The observing interface can only be configured on LAN-side Ethernet interfaces.
The packets on multiple interfaces can be mirrored to one observing interface.
NOTE
Observing and mirrored interfaces are configured on the same device.
The packets on the mirrored interface are copied to the observing interface; therefore, the observing
interface is considered as the outbound interface of the packets. In this case, the discarded packets on the
mirrored interface are not counted.
When you configure the observing interface and mirrored interface, pay attention to the interface
bandwidth. For example, if a GE interface is used as the mirrored interface and an Ethernet interface is
used as the observing interface, the observing interface has no sufficient capability to receive packets and
mirroring packets may be lost.
Remote Port Mirroring
As shown in Figure 4-3, the monitored devices and observing device are located on different
networks. Remote port mirroring can be configured on RouterA to monitor and analyze the
packets passing through the specified interface. RouterA copies the packets passing through the
mirrored interface and sends the packets to the observing device through the IP network.
Figure 4-3 Networking diagram of remote port mirroring
RouterA
Monitoring
device
Packet flows
Mirroring port
Copied packet flows
IP network
Mirroring port
RouterB
Host A
Remote Flow Mirroring
As shown in Figure 4-4, RouterA copies the packets matching a specified traffic classifier from
the mirrored interface to the observing device through the IP network. In flow mirroring, a traffic
policy containing the flow mirroring behavior is applied to the mirrored interface. If the packets
passing through the mirrored port match the traffic classification rules contained in the traffic
policy, the packets are copied to the observing device.
Huawei AR150&200 Series Enterprise Routers
Configuration Guide - Device Management 4 Mirroring Configuration
Issue 02 (2012-03-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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