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GS700TR Smart Switch Software Administration Manual
3-22 Configuring Switching Information
v1.0, May, 2008
Figure 3-15
Table 3-14. Spanning Tree CST Configuration/Status Fields
Field Description
Bridge Priority When switches or bridges are running STP, each is assigned a priority.
After exchanging BPDUs, the switch with the lowest priority value
becomes the root bridge. Specifies the bridge priority value for the
Common and Internal Spanning Tree (CST). The valid range is 0-61440.
The bridge priority is a multiple of 4096. If you specify a priority that is not
a multiple of 4096, the priority is automatically set to the next lowest
priority that is a multiple of 4096. For example if the priority is attempted
to be set to any value between 0 and 4095, it will be set to 0. The default
priority is 32768.
Bridge Max Age (secs) Specifies the bridge maximum age time for the Common and Internal
Spanning Tree (CST), which indicates the amount of time in seconds a
bridge waits before implementing a topological change. The valid range
is 6-40, and the value must be less than or equal to (2 * Bridge Forward
Delay) – 1 and greater than or equal to 2 * (Bridge Hello Time +1). The
default value is 20.
Bridge Hello Time (secs) Specifies the switch Hello time for the Common and Internal Spanning
Tree (CST), which indicates the amount of time in seconds a root bridge
waits between configuration messages. The valid range is 1-10, and the
default value is 2. The value must be less than or equal to (Bridge Max
Age / 2) – 1.