Spanning-Tree Protocols Supported on MX Series Routers

BPDU Overview

Spanning-Tree Protocols in Logical Systems

RSTP or VSTP Forced to Run as IEEE 802.1D STP

Reverting RSTP or VSTP Back From Forced IEEE 802.1D STP

Provider Bridge Participation in RSTP or MSTP Instances

System Identifier for Bridges in STP or RSTP Instances

Bridge Priority for Election of Root Bridge and Designated Bridge

Maximum Age for Awaiting Arrival of Hello BPDUs

Hello Time for Root Bridge to Transmit Hello BPDUs

Forward Delay Before Ports Transition to Forwarding State

Spanning-Tree Instance Interface

Spanning-Tree Instance Interface Priority

Spanning-Tree Instance Interface Cost

Spanning-Tree Instance Interface Point-to-Point Link Mode

Spanning-Tree Instance Interface Configured as an Edge Port

Spanning-Tree Protocol Trace Options

Configuring RSTP

Configuring MSTP

Configuring MST Instances on a Physical Interface

Disabling MSTP

Configuring VSTP

Tracing Spanning-Tree Operations

Blocking BPDUs on Aggregated Ethernet

Tracing Spanning-Tree Protocol Operations

[edit protocols mstp] Hierarchy Level

[edit protocols rstp] Hierarchy Level

[edit protocols vstp] Hierarchy Level

 •  protocols

 •  bpdu-destination-mac-address (Spanning Tree)

 •  bridge-priority

 •  configuration-name

 •  cost

 •  disable

 •  edge

 •  extended-system-id

 •  force-version

 •  forward-delay

 •  hello-time

 •  interface (Spanning Tree)

 •  max-age

 •  max-hops

 •  mode

 •  msti

 •  mstp

 •  priority

 •  revision-level

 •  rstp

 •  traceoptions

 •  vlan (MSTP)

 •  vlan (VSTP)

 •  vstp

[edit protocols layer2-control] Hierarchy Level

 •  interface (Layer 2 Protocol Tunneling)

 •  layer2-control

 •  mac-rewrite

 •  protocol

Reverting RSTP or VSTP Back From Forced IEEE 802.1D STP

Checking the Status of Spanning-Tree Instance Interfaces

Clearing the Blocked Status of a Spanning-Tree Instance Interface

Checking for a MAC Rewrite Error Condition Blocking a Spanning-Tree Instance Interface

Clearing a MAC Rewrite Error Condition Blocking a Spanning-Tree Instance Interface

clear spanning-tree protocol-migration

show spanning-tree bridge

show spanning-tree interface

show spanning-tree mstp configuration

clear spanning-tree statistics

show spanning-tree statistics

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