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.

Hello Time

The time for which the bridge interface remains in the listening or learning state.

Forward Delay

The time for which the bridge interface remains in the listening or learning state before transitioning to the forwarding state.

Extended System ID

The system 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.

Spanning Tree Interface Details

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.

Designated Bridge ID

ID of the designated bridge to which the interface is attached.

Port Cost

Configured cost for the interface.

Port State

STP port state:

• Forwarding (FWD)
• Blocking (BLK)
• Listening
• Learning
• Disabled

Role

MSTP or RSTP port role, Designated (DESG), backup (BKUP), alternate (ALT), or root.

Spanning Tree Statistics of Interface

Interface

Interface for which statistics is being displayed.

BPDUs Sent

Total number of BPDUs sent.

BPDUs Received

Total number of BPDUs received.

Next BPDU Transmission

Number of seconds until the next BPDU is scheduled to be sent.