UANTA COMPUTER INC.
Layer 2/3/4 Managed Switch
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LB9
User’s Guide 1197/1523
11.3.24.2
Configuring Spanning Tree CST Configuration Page
Configurable Data
Bridge Priority
- Specifies the bridge priority for the Common and Internal Spanning tree (CST).
The value lies between 0 and 61440. It is set in multiples of 4096. For example, if you set the priority
to any value between 0 and 4095, it will be set to 0. If it is tried to be set to any value between 4096
and (2*4096-1) it will be set to 4096 and so on. The default priority is 32768.
Bridge Max Age
- Specifies the bridge max age for the Common and Internal Spanning tree (CST).
The value lies between 6 and 40, with the value being 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
- Specifies the bridge hello time for the Common and Internal Spanning tree
(CST), with the value being less than or equal to "(Bridge Max Age / 2) - 1". The default hello time
value is 2.
Bridge Forward Delay
- Specifies the time spent in "Listening and Learning" mode before
forwarding packets. Bridge Forward Delay must be greater or equal to "(Bridge Max Age / 2) + 1".
The time range is from 4 seconds to 30 seconds. The default value is 15.
Spanning Tree Maximum Hops
- Configure the maximum number of hops for the Spanning tree.
Non-Configurable Data
Bridge identifier
- The bridge identifier for the CST. It is made up using the bridge priority and the
base MAC address of the bridge.
Time since topology change
- The time in seconds since the topology of the CST last changed.
Topology change count
- Number of times topology has changed for the CST.
Topology change
- The value of the topology change parameter for the switch indicating if a
topology change is in progress on any port assigned to the CST. It takes a value if True or False.
