Example for Configuring Local Port Mirroring
Networking Requirements
Figure 1. Local Port Mirroring Configuration Example
As shown in Figure 1, Host A, Host B and Host C access the Internet through Switch B. The Data Monitoring Server needs to monitor the traffic from the three hosts accessing the internet.
Follow the following configuration procedure on Switch B to complete port mirroring configurations to achieve above requirement.
- Configure interface ge-1/1/2 as the output port for mirroring, which is responsible for forwarding mirrored messages to the Data Monitoring Server.
- Configure interface ge-1/1/1 as the input port for mirroring to make a copy of the traffic from Host A, Host B and Host C accessing the Internet to the mirroring output port.
Procedure
Step 1Â Â Â Â Â Configure VLAN.
admin@SwitchB# set vlans vlan-id 110 admin@SwitchB# set interface gigabit-ethernet ge-1/1/1 family ethernet-switching native-vlan-id 110 admin@SwitchB# set interface gigabit-ethernet ge-1/1/2 family ethernet-switching native-vlan-id 110
Step 2Â Â Â Â Â Configure the input port for mirroring.
admin@SwitchB# set interface ethernet-switching-options analyzer 111 input ingress ge-1/1/1 admin@SwitchB# set interface ethernet-switching-options analyzer 111 input egress ge-1/1/1
 Step 3     Configure the output port for mirroring.
admin@SwitchB# set interface ethernet-switching-options analyzer 111 output ge-1/1/2
 Step 4     Commit the configurations.
admin@SwitchB# commit
 Step 5     Verify the configuration.
admin@SwitchB# run show analyzer 111 Analyzer name: 111 Output interface: <ge-1/1/2> Ingress monitored interfaces: <ge-1/1/1> Egress monitored interfaces: <ge-1/1/1>
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