Juniper Networks EX2500 manual Configuring Port Mirroring

EX2500 Ethernet Switch Configuration Guide

As shown in Figure 15, port 2 is acting as a monitor port, receiving mirrored traffic from three other switch ports: ingress traffic from port 4, egress traffic from port 7, and both ingress and egress traffic from port 10. A sniffer could be attached to port 2 in order to monitor the mirrored traffic on ports 4, 7, and 10.

NOTE: Ingress and egress traffic is duplicated and sent to the monitor port after regular switch processing is complete.

Configuring Port Mirroring

To configure port mirroring for the example shown in Figure 15:

1.Specify the monitoring port, the mirroring port(s), and the port-mirror direction.

ex2500(config)# port-mirroring monitor-port 2 mirroring-port 4 in ex2500(config)# port-mirroring monitor-port 2 mirroring-port 7 out ex2500(config)# port-mirroring monitor-port 2 mirroring-port 10 both

2.Enable port mirroring. ex2500(config)# port-mirroring enable

3.View the current configuration.

ex2500# show port-mirroring Port mirroring is enabled Monitoring Ports Mirrored Ports

1none

2(4, in) (7, out) (10, both)

3none

4none

5none

6none

7none

8none

9none

10none

...

82„ Configuring Port Mirroring