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CHAPTER 4
Configuring Ethernet Switching Options
Configuring Port Mirroring to Analyze Traffic on EX-series Switches (NSM Procedure)
Copyright © 2010, Juniper Networks, Inc.
This section contains the following:
Configuring Port Mirroring to Analyze Traffic on EX-series Switches (NSM
Procedure) on page 35
Configuring Redundant Trunk Links (NSM Procedure) on page 36
Configuring Port Security (NSM Procedure) on page 37
Configuring Static IP (NSM Procedure) on page 39
Configuring VoIP (NSM Procedure) on page 40
You configure port mirroring in order to copy packets so that you can analyze traffic using
a protocol analyzer application. You can mirror traffic entering or exiting an interface, or
entering a VLAN. You can send the mirrored packets to a local interface to monitor traffic
locally or to a VLAN to monitor traffic remotely.
Mirroring a high volume of traffic can be performance intensive for the switch. Therefore,
you should disable port mirroring when you are not using it and select specific input
interfaces in preference to using the
traffic by using a firewall filter or the
NOTE: Only one analyzer can be enabled on an EX-series switch. To create
additional analyzers, first disable any existing analyzers.
NOTE: Interfaces used as input or output for a port mirror analyzer must be
configured as family
To mirror interface traffic or VLAN traffic on the switch to an interface on the switch:
In the navigation tree, select Device Manager > Devices. In Device Manager, select
1.
the device for which you want to configure a port mirror analyzer.
In the Configuration tree, expand Ethernet Switching Options.
2.
all
keyword. You can also limit the amount of mirrored
keyword to mirror only a selection of packets.
ratio
.
ethernet-switching
35
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