Switch User Manual

U SING THE S YSTEM C ONFIGURATION P ROGRAM
2-38
Parameter Description
Priority Device priority is used in selecting the root device,
root port, and designated port. The device with the
highest priority becomes the STA root device.
However, if all devices have the same priority, the
device with the lowest MAC address will then
become the root device.
Hello Time The time interval (in seconds) at which the root
device transmits a configuration message.
Max Age The maximum time (in seconds) a device can wait
without receiving a configuration message before
attempting to reconfigure.
Forward Delay The maximum time (in seconds) the root device will
wait before changing states (i.e., listening to learning
to forwarding).
Hold Time The minimum interval between the transmission of
consecutive Configuration BPDUs.
Designated Root The priority and MAC address of the device in the
Spanning Tree that this switch has accepted as the
root device.
Root Cost The path cost from the root port on this switch to the
root device.
Root Port The number of the port on this switch that is closest
to the root. This switch communicates with the root
device through this port. If there is no root port, then
this switch has been accepted as the root device of
the Spanning Tree network.
Reconfig Count The number of times the Spanning Tree has been
reconfigured.
Topology Up Time The time since the Spanning Tree was last
reconfigured.