Lobos Tech LB-FEA800M - Manual (Page 75)

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Description
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You can make it more or less likely to become the root port, the
rage is 0-255,default setting is 128
the lowest number has the highest priority. If you change the value,
you must reboot the switch.
Pat
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Specifies the path cost of the port that switch uses to determine
which port are the forwarding ports
the lowest number is forwarding ports, the rage is 1-65535
and default value base on IEEE802.1D
10Mb/s = 50-600 100Mb/s = 10-60
If you change the value, you must reboot the switch.
5-4-9. Port Mirror
The Port Mirror is a method for monitor traffic in switched networks.
Traffic through ports can be monitored by one specific port. That is,
traffic goes in or out monitored ports will be duplicated into mirror port.