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RSTP System Configuration
System Priority: This parameter configures the spanning tree priority
globally for this switch. The device with the highest priority becomes the
STP root device. However, if all devices have the same priority, the device
with the lowest MAC address will then become the root device. Number
between 0 - 61440 in increments of 4096. Therefore, there are 16 distinct
values.
Hello Time: Interval (in seconds) at which the root device transmits a
configuration message (BPDU frame). Number between 1-10 (default is 2).
Max Age – The maximum time (in seconds) a device can wait without
receiving a configuration message before attempting to reconfigure. That
also means the maximum life time for a BPDU frame. Number between 6-40
(default is 20).
Forward Delay: The maximum time (in seconds) the root device will wait
before changing states (i.e., discarding to learning to forwarding). Number
between 4 – 30 (default is 15).
Force Version: Set and show the RSTP protocol to use. Normal - use RSTP,
Compatible - compatible with STP.
RSTP Port Configuration
Port: The port ID. It cannot be changed. Aggregations mean any configured
trunk group.
Enabled: Click on the tick-box to enable/disable the RSTP protocol for the
port.
Edge: Expect the port to be an edge port (linking to an end station) or a link
to another STP device.
Path Cost: This parameter is used by the STP to determine the best path
Figure 2-6-1
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