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9.
Spanning Tree
9.1
STP Bridge Settings
Bridge 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).
Chapter
9
