Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 3942

Complete Software Guide for Junos
3838
®
OS for EX Series Ethernet Switches, Release 10.4
This example describes how to configure an EX Series switch to mirror traffic entering
interfaces connected to employee computers to an analyzer output interface on the
same switch.
This example describes how to configure local port mirroring:
Requirements on page 3838
Overview and Topology on page 3838
Mirroring All Employee Traffic for Local Analysis on page 3839
Mirroring Employee-to-Web Traffic for Local Analysis on page 3840
Verification on page 3842
Requirements
This example uses the following hardware and software components:
Junos OS Release 9.0 or later for EX Series switches
One EX Series switch
Before you configure port mirroring, be sure you have an understanding of port mirroring
concepts.
Overview and Topology
This topic includes two related examples that describe how to mirror traffic entering
ports on the switch to a destination interface on the same switch. The first example
shows how to mirror all traffic entering the ports connected to employee computers.
The second example shows the same scenario, but includes a filter to mirror only the
employee traffic going to the Web.
Network Topology
In this example,
ge-0/0/0
In this example, one interface,
Connect a PC running a protocol analyzer application to the analyzer output interface
to analyze the mirrored traffic.
NOTE: Multiple ports mirrored to one interface can cause buffer overflow
and dropped packets.
Figure 93 on page 3839 shows the network topology for this example.
and serve as connections for employee computers.
ge-0/0/1
, is reserved for analysis of mirrored traffic.
ge-0/0/10
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