TechLibrary

Spanning Trees Overview
Understanding MSTP for EX Series Switches Understanding RSTP for EX Series Switches Understanding STP for EX Series Switches RSTP or VSTP Forced to Run as IEEE 802.1D STP Understanding VSTP for EX Series Switches Understanding BPDU Protection for STP, RSTP, and MSTP on EX Series Switches Understanding Loop Protection for STP, RSTP, VSTP, and MSTP on EX Series Switches Understanding Root Protection for STP, RSTP, VSTP, and MSTP on EX Series Switches

Spanning Trees Overview

Understanding MSTP for EX Series Switches

Understanding RSTP for EX Series Switches

Understanding STP for EX Series Switches

RSTP or VSTP Forced to Run as IEEE 802.1D STP

Understanding VSTP for EX Series Switches

Understanding BPDU Protection for STP, RSTP, and MSTP on EX Series Switches

Understanding Loop Protection for STP, RSTP, VSTP, and MSTP on EX Series Switches

Understanding Root Protection for STP, RSTP, VSTP, and MSTP on EX Series Switches

Configuration Examples
Example: Configuring Faster Convergence and Improved Network Stability with RSTP on EX Series Switches Example: Configuring Network Regions for VLANs with MSTP on EX Series Switches Example: Configuring BPDU Protection on Edge Interfaces to Prevent STP Miscalculations on EX Series Switches Example: Configuring BPDU Protection on Interfaces to Prevent STP Miscalculations on EX Series Switches Example: Configuring Loop Protection to Prevent Interfaces from Transitioning from Blocking to Forwarding in a Spanning Tree on EX Series Switches Example: Configuring Root Protection to Enforce Root Bridge Placement in Spanning Trees on EX Series Switches

Configuration Examples

Example: Configuring Faster Convergence and Improved Network Stability with RSTP on EX Series Switches

Example: Configuring Network Regions for VLANs with MSTP on EX Series Switches

Example: Configuring BPDU Protection on Edge Interfaces to Prevent STP Miscalculations on EX Series Switches

Example: Configuring BPDU Protection on Interfaces to Prevent STP Miscalculations on EX Series Switches

Example: Configuring Loop Protection to Prevent Interfaces from Transitioning from Blocking to Forwarding in a Spanning Tree on EX Series Switches

Example: Configuring Root Protection to Enforce Root Bridge Placement in Spanning Trees on EX Series Switches

Configuration Tasks
Forcing RSTP or VSTP to Run as IEEE 802.1D STP (CLI Procedure) Configuring Spanning-Tree Protocols (J-Web Procedure) Configuring RSTP (CLI Procedure) Configuring VLAN Spanning-Tree Protocol Unblocking an Interface That Receives BPDUs in Error on EX Series Switches (CLI Procedure)

Configuration Tasks

Forcing RSTP or VSTP to Run as IEEE 802.1D STP (CLI Procedure)

Configuring Spanning-Tree Protocols (J-Web Procedure)

Configuring RSTP (CLI Procedure)

Configuring VLAN Spanning-Tree Protocol

Unblocking an Interface That Receives BPDUs in Error on EX Series Switches (CLI Procedure)

Operational Tasks
Reverting to RSTP or VSTP from Forced IEEE 802.1D STP

Configuration Statements
bpdu-block bpdu-block-on-edge bpdu-timeout-action bridge-priority configuration-name cost disable disable-timeout (Spanning Trees) edge force-version (IEEE 802.1D STP) forward-delay hello-time interface (for BPDU loop protection) interface (for spanning trees) max-age max-hops mode msti mstp no-root-port priority protocol protocols revision-level rstp traceoptions vlan (for MSTP) vlan (for VSTP) vstp

Configuration Statements

disable-timeout (Spanning Trees)

edge

force-version (IEEE 802.1D STP)

forward-delay

hello-time

interface (for BPDU loop protection)

interface (for spanning trees)

vlan (for MSTP)

vlan (for VSTP)

vstp

Routine Monitoring
Monitoring Spanning-Tree Protocols

Operational Commands
clear error bpdu interface clear spanning-tree protocol-migration clear spanning-tree statistics (for EX Series switches only) clear spanning-tree statistics show spanning-tree bridge (for EX Series switches only) show spanning-tree bridge show spanning-tree interface (for EX Series switches only) show spanning-tree interface show spanning-tree mstp configuration (for EX Series switches only) show spanning-tree mstp configuration show spanning-tree statistics (for EX Series switches only) show spanning-tree statistics

Operational Commands

clear error bpdu interface

clear spanning-tree protocol-migration

clear spanning-tree statistics (for EX Series switches only)

clear spanning-tree statistics

show spanning-tree bridge (for EX Series switches only)

show spanning-tree bridge

show spanning-tree interface (for EX Series switches only)

show spanning-tree interface

show spanning-tree mstp configuration (for EX Series switches only)

show spanning-tree mstp configuration

show spanning-tree statistics (for EX Series switches only)