Monitoring Spanning Tree
To view status and information about the spanning tree interface parameters, select Monitor>Switching>Spanning Tree in the J-Web interface or enter the following CLI commands:
- show spanning-tree interface
- show spanning-tree bridge
Table 207 summarizes the Spanning Tree output fields.
Table 207: Summary of Spanning Tree Output Fields
Field | Values | Additional Information |
|---|---|---|
| Spanning Tree 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. | |
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. | |
| 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. | |