Specifications

Port Mirroring
Mirroring Features
SecureStack A2 Configuration Guide 3-43
3.4 PORT MIRRORING
The SecureStack device allows you to mirror (or redirect) the traffic being switched on a port for
the purposes of network traffic analysis and connection assurance. When port mirroring is enabled,
one port becomes a monitor port for one or more other ports within the system.
3.4.1 Mirroring Features
The SecureStack A2 device also supports the following mirroring features:
• Mirroring can be configured in a many-to-one configuration so that one target (destination) port
can monitor traffic on up to 4 source ports. Only one mirror destination port can be configured
per stack.
• Both transmit and receive traffic will be mirrored.
• A mirroring session which is configured to be active (enabled) will be operationally active only
if both a destination port and at least one source port have been configured.
• A destination port will only act as a mirroring port when the session is operationally active. If
the mirroring session is not operationally active, then the destination port will act as a normal
port and participate in all normal operation with respect to transmitting traffic and participating
in protocols.
3.4.2 Setting Port Mirroring
Purpose
To review and configure port mirroring on the device.
Commands
The commands used to review and configure port mirroring are listed below and described in the
associated section as shown.
• show port mirroring (Section 3.4.2.1)
• set port mirroring (Section 3.4.2.2)
• clear port mirroring (Section 3.4.2.3)
CAUTION: Port mirroring configuration should be performed only by personnel who are
knowledgeable about the effects of port mirroring and its impact on network operation.