Ubiquiti EdgeSwitch ES-24-250W Administration Manual page 168

EdgeSwitch Administration Guide
™
Field
MST ID
Priority
# of Associated VLANs
Bridge Identifier
Time Since Topology Change
Designated Root
Root Path Cost
Root Port
Use the buttons to perform the following tasks:
• To configure a new MSTI, click Add, configure the settings as required, and Submit to apply the new
settings to the switch.
• To change an existing MSTI's settings, select the entry, click Edit, make the required changes, and click
Submit to apply the changes.
• To remove an MSTI, select the entry, click Remove, and confirm the deletion.
• Click Refresh to update the screen with most recent data.
To retain the changes across the switch's next power cycle, click System > Configuration Storage > Save.
Ubiquiti Networks, Inc.
Spanning Tree MST Summary
Spanning Tree MST Summary Fields
Description
The number that identifies the MST instance.
The bridge priority for the spanning-tree instance. This value affects the likelihood that the bridge is
selected as the root bridge. A lower value increases the probability that the bridge is selected as the
root bridge.
The number of VLANs that are mapped to the MSTI. This number does not contain any information
about the VLAN IDs that are mapped to the instance.
A unique value that is automatically generated based on the bridge priority value of the MSTI and
the base MAC address of the bridge. When electing the root bridge for an MST instance, if the bridge
priorities for multiple bridges are equal, the bridge with the lowest MAC address is elected as the root
bridge.
The amount of time that has passed since the topology of the MSTI has changed.
The bridge identifier of the root bridge for the MST instance. The identifier is made up of the bridge
priority and the base MAC address.
The path cost to the designated root for this MST instance. Traffic from a connected device to the root
bridge takes the least-cost path to the bridge. If the value is 0, the cost is automatically calculated
based on port speed.
The port on the bridge with the least-cost path to the designated root for the MST instance.
Configuring Switching Information
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