Ubiquiti ES-24-250W, Руководство администратора

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Configuring Switching Information EdgeSwitch
™
Administration Guide
Ubiquiti Networks, Inc.
Spanning Tree CST Port Configuration
Use the CST Port page to view and configure the Common Spanning Tree (CST) settings for each interface on
the device. To configure CST settings for an interface and to view additional information about the interface’s
role in the CST topology, select the interface to view or configure and click
Edit .
To display the Spanning Tree CST Port page, click
Switching
>
Spanning Tree
>
CST Port
in the navigation menu.
Spanning Tree CST Port
Spanning Tree CST Port Fields
Field Description
Interface The port or link aggregation group (LAG) associated with the rest of the data in the row. When
configuring CST settings for an interface, this field identifies the interface being configured.
Port Role The role of the port within the CST, which is one of the following:
• Root A port on the non-root bridge that has the least-cost path to the root bridge.
•
Designated
A port that has the least-cost path to the root bridge on its segment.
• Alternate A blocked port that has an alternate path to the root bridge.
•
Backup
A blocked port that has a redundant path to the same network segment as another port
on the bridge.
•
Master
The port on a bridge within an MST instance that links the MST instance to other STP regions.
• Disabled The port is administratively disabled and is not part of the spanning tree.
Port Forwarding State • Blocking The port discards user traffic and receives, but does not send, BPDUs. During the
election process, all ports are in the blocking state. The port is blocked to prevent network loops.
• Listening The port sends and receives BPDUs and evaluates information to provide a loop-free
topology. This state occurs during network convergence and is the first state in transitioning to the
forwarding state.
• Learning The port learns the MAC addresses of frames it receives and begins to populate the
MAC address table. This state occurs during network convergence and is the second state in
transitioning to the forwarding state.
• Forwarding The port sends and receives user traffic.
• Disabled The port is administratively disabled and is not part of the spanning tree.