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 1 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 2 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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