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NCT-1000/NCT-1020 User Guide
YML836 Rev2
6.2 Spanning Tree
The Spanning Tree tab displays the spanning tree parameters of the uplink ports- UP (labeled Ethernet 1 on
the shelf rear panel), Down (labeled Ethernet 2 on the shelf rear panel), Giga ports1 and Giga Port 2. It also
allows enabling or disabling each port individually.
The following two parameters are used to configure the spanning tree functions.
Click the Set button below to apply the settings.
Spanning Tree:
Choose Disable to close the spanning tree function; choose Enable to allow it.
Priority (0-255):
When the spanning tree is enabled, type a value (0-255) to specify the spanning
tree priority.
The following information is displayed on the screen:
Hold Time:
The minimum interval between the transmissions of consecutive Configuration
BPDUs (STP packets).
Designed 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 com-
municates 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.
Config Change Time:
The number of times the Spanning Tree has been reconfigured.
Topology Up Time:
The time since the Spanning Tree was last reconfigured.
Bridge Status:
This field indicates the status of the bridge- disable, blocking, listening, learning,
and forwarding.
Summary of Contents for NCT-1000
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