Bay Networks BayStack 350, Using Manual, Page: 91 / 248

BayStack 350 10/100/1000 Series Switches
304376-B Rev 00
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Port Mirroring Configuration Rules
The following configuration rules must be applied to any port mirroring
configuration:
• A monitor port cannot be configured as a trunk member or IGMP member,
and cannot be used for normal switch functions.
• When a port is configured and enabled as a monitor port, the port is
automatically disabled from participating in the spanning tree. When the port
is reconfigured as a standard switch port (no longer a monitor port), the port
becomes enabled for spanning tree participation.
• When creating 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 3-22).
• 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), then change
the VLAN configuration settings.
• For port-based monitoring of traffic, 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.
Monitor all traffic received by port X or transmitted by port Y.
For more information about using the Port Mirroring feature, see “Port Mirroring
Configuration” on page 3-41.
See also Appendix C, “Quick Steps to Features” for configuration flowcharts that
can help you use this feature.
kombk.book Page 67 Thursday, February 18, 1999 10:59 AM