Wavetronix Click 342 (lean managed ethernet switch) (CLK-342) - Managed Switches User Guide User Manual
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CHAPTER 6 • RAPID SPANNING TREE
The switch with the lowest numerical switch ID becomes the root. It is recommended
that the root port and alternate port are specified using the priority.
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Port Identifier – The port ID consists of 4 bits for the port priority and 12 bits for the
port number. The port ID is interpreted as an unsigned integer value. When comparing
two port IDs, the one with the lowest numeric value is of higher priority.
Figure 6.5 – RSTP Port Configuration Web Page
The RSTP Port Configuration page contains the following fields (see Figure 6.5):
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Port Number – Indicates the number of the port currently selected.
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Port Name – Indicates the name of the port.
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RSTP Port State – Indicates the status in which this port takes part in STP.
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Operational Edge Port – Indicates whether this port is operated as an edge port.
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Admin Edge Port – Here you can specify whether this port is to be operated as an edge
port (default setting), if possible.
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Priority – Indicates the priority set for this port. Due to backwards compatibility with
STP, priority values can be set that are not configurable in RSTP.
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Admin Path Cost – Indicates the path costs set for this port. A path cost equal to “0”
activates the cost calculation according to the transmission speed (10 MBps = 100; 100
MBps = 19).
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Path Cost – Indicates the path costs used for this port.
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Forward Transitions – Indicates how often the port switches from the “Discarding”
state to the “Forwarding” state. Additional parameters provide information about net-
work paths in a stable topology that are used by the BPDU telegrams.
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Designated Root – Gives the root bridge for this Spanning Tree.
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Designated Bridge – Indicates the switch from which the port receives the best BPDUs.
The value is based on the priority value in hex and the MAC address.
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Designated Port – Gives the port from which the BPDUs are sent. The value is based
on the port priority (2 digits) and the port number.