NETGEAR GS752TP Software Administration Manual page 95

GS752TP, GS728TP, and GS728TPP Gigabit Smart Switches
2. Specify values for CST in the following fields:
• Bridge Priority. Specify the bridge priority value for the Common and Internal
Spanning Tree (CST). 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. 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 you set the priority to any value from 0 through
4095, it is set to 0. The valid range is 0–61440. The default priority is 32768.
• Bridge Max Age (Sec). Specify 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 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 valid range is 6–40, and the default value is 20.
• Bridge Hello Time (Sec). 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 value is fixed at 2 seconds.
• Bridge Forward Delay (Sec). Specify the switch forward delay time, which indicates
the amount of time in seconds a bridge remains in a listening and learning state
before forwarding packets. The value must be greater or equal to (bridge max age / 2)
+ 1. The valid range is 4–30 seconds. The default value is 15.
• Spanning Tree Maximum Hops. Specify the maximum number of bridge hops the
information for a particular CST instance can travel before being discarded. The valid
range is 1–40.
3. Click APPLY to send the updated configuration to the switch.
Configuration changes take place immediately.
The following table describes the MSTP Status information displayed on the CST
Configuration screen:
Configuring Switching Information
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