Monitoring Spanning Tree
Purpose
Use the monitoring functionality to view the Spanning Tree page.
Action
To monitor spanning tree, select Monitor>Switching>Spanning Tree in the J-Web user interface.
Meaning
Table 1 summarizes key output fields in the spanning tree page.
Table 1: Spanning Tree Monitoring Page
Field | Value | Additional Information |
|---|---|---|
| Bridge parameters | ||
Context ID | An internally generated identifier. | – |
Enabled Protocol | Spanning tree protocol type enabled. | – |
Root ID | Bridge ID of the elected spanning tree root bridge. | The bridge ID consists of a configurable bridge priority and the MAC address of the bridge. |
Bridge ID | Locally configured bridge ID. | – |
Inter instance ID | An internally generated instance identifier. | – |
Extended system ID | Extended system generated instance identifier. | – |
Maximum age | Maximum age of received bridge protocol data units (BPDUs). | – |
Number of topology changes | Total number of STP topology changes detected since the switch last booted. | – |
Forward delay | Spanning tree forward delay. | – |
| Interface List | ||
Interface Name | Interface configured to participate in the STP instance. | – |
Port ID | Logical interface identifier configured to participate in the STP instance. | – |
Designated Port ID | Port ID of the designated port for the LAN segment to which the interface is attached. | – |
Port Cost | Configured cost for the interface. | – |
State | STP port state. Forwarding (FWD), blocking (BLK), listening, learning, or disabled. | – |
Role | MSTP or RSTP port role. Designated (DESG), backup (BKUP), alternate (ALT), or root. | – |
