BayStack 450 10/100/1000 Series Switches
309978-D Rev 01 1-103
Port Mirroring Configuration Rules
The following configuration rules apply to any port mirroring configuration:
• Any port that is currently configured for EAPOL-based security cannot be
configured for port mirroring.
• You cannot configure a monitor port as a trunk member or IGMP member.
• A monitor port cannot be used for normal switch functions.
• When you configure a port as a monitor port, the port is automatically
disabled from participating in the spanning tree. When you reconfigure the
port as a standard switch port (no longer a monitor port), the port is enabled
for spanning tree participation.
• When you create a port-based port mirroring configuration, be sure that the
monitor port and both of the mirrored ports, port X and port Y, have the same
configuration. Use the VLAN Configuration screen to configure the VLAN
(see
“VLAN Configuration” on page 3-46).
• VLAN configuration settings for any ports configured for port-based
mirroring cannot be changed. Use the Port Mirroring Configuration screen to
disable port mirroring (or reconfigure the port mirroring ports), and then
change the VLAN configuration settings.
• For port-based traffic monitoring, use one of the following modes for
monitoring broadcast, IP multicast, or unknown DA frames:
-- Monitor all traffic received by port X.
-- Monitor all traffic transmitted by port X.
-- Monitor all traffic received and transmitted by port X.
For more information about using the Port Mirroring feature, see “Port Mirroring
Configuration” on page 3-71.
Also see Appendix E, “Quick Steps to Features,” for configuration flowcharts that
can help you use this feature.
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