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9. Monitoring Port Traffic
The SmartStack
The external probe (for example, a protocol analyzer) is not supplied with the switch.
You can monitor traffic going through a monitored port in two different ways, by using either:
•
•
active monitoring or
passive monitoring.
Active Monitoring
This mode copies traffic switched to and from the monitored port to the analyzer port. Since MAC frames never are switched between ports, they will not be seen on the analyzer port. To prevent spurious frames, the analyzer port must be a Token- Ring port on the same box as the monitored port. It is recommended that you put the analyzer port into a separate VLAN. The monitored port can be any type of port
➽Note! The analyzer port works as a normal port. This means it can be in FDX/HDX mode, Station/Port 4 or 16 Mpbs. Moreover, you can use any external probe. The frames will be buffered normally, that is, if you try to monitor a FDX 16 MB line with a 4 MB HDX port, data loss can occur.
When the monitored port is in HDX mode, the frames sent to the analyzer port will be the frames received on the
Passive Monitoring
This mode makes a physical connection from the monitored port to the analyzer port. Both the monitored and the analyzer port must be
Monitoring Port Traffic | SmartStack |