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Spanning Tree Protocol

  • 1 Spanning Tree Protocol
    • 1.1 STP overview
    • 1.2 Standard STP Parameter Configuration
      • 1.2.1 STP Parameters and Defaults
      • 1.2.2 Enabling or Disabling the Spanning Tree Protocol (STP)
      • 1.2.3 STP Protection Enhancement
      • 1.2.4 Changing STP Bridge and Port Parameters
      • 1.2.5 Configuring Spanning Tree Protocol
      • 1.2.6 Displaying STP Information
    • 1.3 STP Feature Configuration
      • 1.3.1 Fast Port Span
        • 1.3.1.1 Disabling and Re-Enabling Fast Port Span
        • 1.3.1.2 Excluding Specific Ports from Fast Port Span
      • 1.3.2 Fast Uplink Span
        • 1.3.2.1 Active Uplink Port Failure
        • 1.3.2.2 Switchover to the Active Uplink Port
        • 1.3.2.3 Fast Uplink Span Rules for LAGs
      • 1.3.3 STP Configuration Examples
      • 1.3.4 802.1W Rapid Spanning Tree (RSTP)
        • 1.3.4.1 Bridges and Bridge Port Roles
        • 1.3.4.2 Edge Ports and Edge Port Roles
        • 1.3.4.3 Point-to-Point Ports
        • 1.3.4.4 Bridge Port States
        • 1.3.4.5 Edge Port and Non-Edge Port States
        • 1.3.4.6 Changes to Port Roles and States
        • 1.3.4.7 IEEE 802.1w Convergence in a Simple Topology
        • 1.3.4.8 Convergence after a Link Failure
        • 1.3.4.9 Convergence at Link Restoration
        • 1.3.4.10 Convergence in a Complex IEEE 802.1w Topology
        • 1.3.4.11 Propagation of Topology Change
        • 1.3.4.12 Compatibility of 802.1W with 802.1D
        • 1.3.4.13 Configuring 802.1W Rapid Spanning Tree Protocol
          • 1.3.4.13.1 Note Regarding Pasting 802.1W Settings into the Running Configuration
        • 1.3.4.14 Displaying RSTP (IEEE 802.1w) Information
      • 1.3.5 Single 802.1W Rapid Spanning Tree Protocol (SRSTP)
        • 1.3.5.1 Enabling 802.1W Single Rapid Spanning Tree Protocol
        • 1.3.5.2 Displaying SRSTP Information
      • 1.3.6 Single Spanning Tree (SSTP)
        • 1.3.6.1 SSTP Defaults
        • 1.3.6.2 Enabling Single Spanning Tree Protocol
        • 1.3.6.3 Displaying SSTP Information
      • 1.3.7 STP per VLAN Group
        • 1.3.7.1 STP Load Balancing
        • 1.3.7.2 Configuring STP per VLAN Group
        • 1.3.7.3 Configuration Example for STP Load Sharing
      • 1.3.8 Spanning Tree Path Cost Support for 802.1D 2004
        • 1.3.8.1 Configuring Spanning Tree Path Cost Support for 802.1D 2004
        • 1.3.8.2 Displaying Spanning Tree 802.1D 2004 Path Cost Information
    • 1.4 PVST/PVST+ Compatibility
      • 1.4.1 Overview of PVST and PVST+
      • 1.4.2 Configuring PVST+ Support
        • 1.4.2.1 Enabling PVST+ Support Manually
      • 1.4.3 Displaying PVST+ Support Information
      • 1.4.4 PVST+ Configuration Examples
        • 1.4.4.1 Tagged Port Using Default VLAN 1 as its Port Native VLAN
        • 1.4.4.2 Untagged Port Using VLAN 2 as Port Native VLAN
      • 1.4.5 PVST+ Protect
    • 1.5 PVRST Compatibility
    • 1.6 BPDU Guard
      • 1.6.1 Enabling STP BPDU Guard
      • 1.6.2 Displaying the BPDU Guard Status
        • 1.6.2.1 BPDU Guard Status Example Configurations
      • 1.6.3 BPDU Guard Status Example Console Messages
    • 1.7 Root Guard
      • 1.7.1 Enabling STP Root Guard
      • 1.7.2 Displaying the STP Root Guard
      • 1.7.3 Displaying the Root Guard by VLAN
    • 1.8 Designated Protection
      • 1.8.1 Enabling Designated Protection on a Port
      • 1.8.2 Syslog Message for a Port in Designated Inconsistent State
    • 1.9 Packet InError Detection
      • 1.9.1 Configuring Packet InError Detection
      • 1.9.2 Syslog Message for Error-Disabled Port Due to inError Packets
    • 1.10 Error Disable Recovery
      • 1.10.1 Enabling an Error-Disabled Port Automatically
      • 1.10.2 Enabling an Error-Disabled Port Manually
      • 1.10.3 Setting the Recovery Interval
      • 1.10.4 Displaying the Error Disable Recovery State by Interface
      • 1.10.5 Displaying the Recovery State for All Conditions
      • 1.10.6 Displaying the Recovery State by Port Number and Cause
      • 1.10.7 Errdisable Syslog Messages
    • 1.11 802.1s Multiple Spanning Tree Protocol
      • 1.11.1 Multiple Spanning Tree Regions
      • 1.11.2 Configuration Notes
      • 1.11.3 Configuring MSTP Mode and Scope
      • 1.11.4 Reduced Occurrences of MSTP Reconvergence
        • 1.11.4.1 Example Application of MSTP Reconvergence
        • 1.11.4.2 Deleting a VLAN to MSTI Mapping
        • 1.11.4.3 Viewing the MSTP Configuration Digest
      • 1.11.5 Configuring Multiple Spanning Tree Protocol
      • 1.11.6 MSTP+ Overview
      • 1.11.7 Configuring MSTP+
      • 1.11.8 Switching Between Non-MSTP, MSTP, and MSTP+ Modes
      • 1.11.9 Disabling MSTP on a Port
      • 1.11.10 Changing MSTP Port Parameters
      • 1.11.11 Forcing Ports to Transmit an MSTP BPDU
      • 1.11.12 Enabling MSTP on a Device
      • 1.11.13 Displaying MSTP Statistics
      • 1.11.14 Displaying MSTP Information for a Specified Instance
      • 1.11.15 Displaying MSTP Information for CIST Instance 0
      • 1.11.16 MSTP Root Guard
        • 1.11.16.1 Configuring MSTP Root Guard
        • 1.11.16.2 Displaying MSTP Root Guard Configuration
    • 1.12 xSTP Syslog for BPDU Threshold
      • 1.12.1 Displaying xSTP statistics

PVST+ Configuration Examples

The following sections show examples for two common configurations:

  • Tagged IEEE 802.1Q BPDUs on VLAN 1 and untagged BPDUs on another VLAN
  • Untagged IEEE 802.1Q BPDUs on VLAN 1 and tagged PVST+ BPDUs on other VLANs

In this section:

  1. Tagged Port Using Default VLAN 1 as its Port Native VLAN
  2. Untagged Port Using VLAN 2 as Port Native VLAN
Parent topic: PVST/PVST+ Compatibility

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