Spanning Tree Mst Configuration - Ubiquiti EdgeSwitch ES-24-250W Administration Manual

EdgeSwitch Administration Guide
™
Field
Topology Change
Acknowledge
Auto Edge
Edge Port
Point-to-point MAC
Root Guard
Loop Guard
TCN Guard
CST Regional Root
CST Path Cost
Loop Inconsistent State
Transitions Into
LoopInconsistent State
Transitions Out Of
LoopInconsistent State
Use the buttons to perform the following tasks:
• To edit the CST port settings, click Edit, configure the settings as needed, and click Submit to apply the
new settings to the switch.
• Click Details to display the CST port settings.
• 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.

Spanning Tree MST Configuration

Use the Spanning Tree MST Summary page to view and configure the Multiple Spanning Tree Instances
(MSTIs) on the device. Multiple Spanning Tree Protocol (MSTP) allows the creation of MSTIs based upon a
VLAN or groups of VLANs. Configuring MSTIs creates an active topology with a better distribution of network
traffic and an increase in available bandwidth when compared to classic STP.
To display the Spanning Tree MST Port Summary page, click Switching > Spanning Tree > MST in the
navigation menu.
Use the buttons to perform the following tasks:
• To configure a new MSTI, click Add and specify the desired settings.
• To change the Priority or the VLAN associations for an existing MSTI, select the entry to modify and
click Edit.
• To remove one or more MSTIs, select each entry to delete and click Remove. You must confirm the action
before the entry is deleted.
Ubiquiti Networks, Inc.
Spanning Tree CST Port Fields (Continued)
Description
Displays True if the next BPDU to be transmitted for this port will have the topology change
acknowledgement flag set; otherwise, displays False.
When this option is selected (enabled), Auto Edge allows the interface to become an edge port if it
does not receive any BPDUs within a given amount of time.
Displays Enabled if the interface is configured as an edge port; otherwise, displays Disabled.
Displays True if the link type for the interface is a point-to-point link; otherwise, displays False.
When this option is selected (enabled), Root Guard allows the interface to discard any superior
information it receives to protect the root of the device from changing. The port gets put into
discarding state and does not forward any frames.
When this option is selected (enabled), Loop Guard prevents an interface from erroneously
transitioning from blocking state to forwarding when the interface stops receiving BPDUs. The port is
marked as being in loop-inconsistent state. In this state, the interface does not forward frames.
When this option is selected (enabled), TCN Guard restricts the interface from propagating any
topology change information received through that interface.
The bridge ID of the bridge that has been elected as the root bridge of the CST region.
The path cost from the interface to the CST regional root.
Displays True if the interface is currently in a loop inconsistent state; otherwise, displays False.
An interface transitions to a loop inconsistent state if loop guard is enabled and the port stops
receiving BPDUs. In this state, the interface does not transmit frames.
The number of times this interface has transitioned into loop inconsistent state.
The number of times this interface has transitioned out of loop inconsistent state.
Configuring Switching Information
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