H3C Campus Fixed-Port Switches CLI-Based Quick Start Configuration Guide-6W101

HomeSupportQuick StartH3C Campus Fixed-Port Switches CLI-Based Quick Start Configuration Guide-6W101
Table of Contents
Related Documents
16-Spanning Tree Quick Start Configuration Guide

Spanning Tree Quick Start Configuration Guide

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Copyright © 2022 New H3C Technologies Co., Ltd. All rights reserved.



Configuring MSTP

Introduction

The following information uses an example to describe the basic procedure for configuring MSTP.

Network configuration

As shown in Figure 1, Device A and Device B operate at the core layer, and Device C and Device D operate at the distribution layer. The ports on the devices have the same path cost, and they all permit VLANs 11 through 30.

Configure MSTP to meet the following requirements:

·     Device A, Device B, Device C, and Device D belong to the same MST region.

·     MSTIs are used to share the traffic of VLANs 11 through 20 and of VLANs 21 through 30.

Figure 1 Network diagram

Analysis

To assign the devices to the same MST region, make sure the following MST region parameters are the same on the devices:

·     Spanning tree mode (the default mode MSTP is used).

·     Region name (test in this example).

·     Revision level (the default value 0 is used).

·     VLAN-to-instance mappings (VLANs 11 through 20 to MSTI 1, and VLANs 21 through 30 to MSTI 2).

To use redundant links to share the traffic of different VLANs (as shown in Figure 2), perform the following tasks:

·     Configure Device A as the root bridge of MSTI 1.

·     Configure Device B as the root bridge of MIST 2.

·     Assign priorities to Device A, Device B, Device C, and Device D in MSTI 0 in descending order for Device A to be the regional root bridge.

Figure 2 MSTIs mapped to different VLANs

Procedure

Configuring Device A

# Create VLANs 11 through 30.

<DeviceA> system-view

[DeviceA] vlan 11 to 30

# Configure GigabitEthernet 1/0/1, GigabitEthernet 1/0/2, and GigabitEthernet 1/0/3 to trunk VLANs 11 through 30.

[DeviceA] interface range gigabitethernet 1/0/1 to gigabitethernet 1/0/3

[DeviceA-if-range] port link-type trunk

[DeviceA-if-range] port trunk permit vlan 11 to 30

[DeviceA-if-range] quit

# Configure the MST region name as test.

[DeviceA] stp region-configuration

[DeviceA-mst-region] region-name test

# Map VLANs 11 through 20 to MSTI 1, and map VLANs 21 through 30 to MSTI 2.

[DeviceA-mst-region] instance 1 vlan 11 to 20

[DeviceA-mst-region] instance 2 vlan 21 to 30

# Activate the MST region configuration.

[DeviceA-mst-region] active region-configuration

[DeviceA-mst-region] quit

# Configure Device A as the root bridge of MSTI 0 and MSTI 1.

[DeviceA] stp instance 0 to 1 root primary

# Enable the spanning tree feature globally.

[DeviceA] stp global enable

# Save the configuration.

[DeviceA] save force

Configuring Device B

# Create VLANs 11 through 30.

<DeviceB> system-view

[DeviceB] vlan 11 to 30

# Configure GigabitEthernet 1/0/1, GigabitEthernet 1/0/2, and GigabitEthernet 1/0/3 to trunk VLANs 11 through 30.

[DeviceB] interface range gigabitethernet 1/0/1 to gigabitethernet 1/0/3

[DeviceB-if-range] port link-type trunk

[DeviceB-if-range] port trunk permit vlan 11 to 30

[DeviceB-if-range] quit

# Configure the MST region name as test.

[DeviceB] stp region-configuration

[DeviceB-mst-region] region-name test

# Map VLANs 11 through 20 to MSTI 1, and map VLANs 21 through 30 to MSTI 2.

[DeviceB-mst-region] instance 1 vlan 11 to 20

[DeviceB-mst-region] instance 2 vlan 21 to 30

# Activate the MST region configuration.

[DeviceB-mst-region] active region-configuration

[DeviceB-mst-region] quit

# Configure Device B as the root bridge of MSTI 2 and a secondary root bridge of MSTI 0.

[DeviceB] stp instance 2 root primary

[DeviceB] stp instance 0 root secondary

# Enable the spanning tree feature globally.

[DeviceB] stp global enable

# Save the configuration.

[DeviceB] save force

Configuring Device C

# Create VLANs 11 through 30.

<DeviceC> system-view

[DeviceC] vlan 11 to 30

# Configure GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 to trunk VLANs 11 through 30.

[DeviceC] interface range gigabitethernet 1/0/1 to gigabitethernet 1/0/2

[DeviceC-if-range] port link-type trunk

[DeviceC-if-range] port trunk permit vlan 11 to 30

[DeviceC-if-range] quit

# Configure the MST region name as test.

[DeviceC] stp region-configuration

[DeviceC-mst-region] region-name test

# Map VLANs 11 through 20 through MSTI 1, and map VLANs 21 through 30 to MSTI 2.

[DeviceC-mst-region] instance 1 vlan 11 to 20

[DeviceC-mst-region] instance 2 vlan 21 to 30

# Activate the MST region configuration.

[DeviceC-mst-region] active region-configuration

[DeviceC-mst-region] quit

# Enable the spanning tree feature globally.

[DeviceC] stp global enable

# Save the configuration.

[DeviceC] save force

Configuring Device D

# Create VLANs 11 through 30.

<DeviceD> system-view

[DeviceD] vlan 11 to 30

# Configure GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 to trunk VLANs 11 through 30.

[DeviceD] interface range gigabitethernet 1/0/1 to gigabitethernet 1/0/2

[DeviceD-if-range] port link-type trunk

[DeviceD-if-range] port trunk permit vlan 11 to 30

[DeviceD-if-range] quit

# Configure the MST region name as test.

[DeviceD] stp region-configuration

[DeviceD-mst-region] region-name test

# Map VLANs 11 through 20 to MSTI 1, and map VLANs 21 through 30 to MSTI 2.

[DeviceD-mst-region] instance 1 vlan 11 to 20

[DeviceD-mst-region] instance 2 vlan 21 to 30

# Activate the MST region configuration.

[DeviceD-mst-region] active region-configuration

[DeviceD-mst-region] quit

# Set the device priority to 36864 in MSTI 0, which is lower than the default priority 32768 of Device C.

[DeviceD] stp instance 0 priority 36864

# Enable the spanning tree feature globally.

[DeviceD] stp global enable

# Save the configuration.

[DeviceD] save force

Verifying the configuration

1.     Verify that Layer 2 loops have been eliminated in each MSTI:

# Display brief spanning tree information on Device A.

[DeviceA] display stp brief

 MST ID   Port                                Role  STP State   Protection

 0        GigabitEthernet1/0/1                DESI  FORWARDING  NONE

 0        GigabitEthernet1/0/2                DESI  FORWARDING  NONE

 0        GigabitEthernet1/0/3                DESI  FORWARDING  NONE

 1        GigabitEthernet1/0/1                DESI  FORWARDING  NONE

 1        GigabitEthernet1/0/2                DESI  FORWARDING  NONE

 1        GigabitEthernet1/0/3                DESI  FORWARDING  NONE

 2        GigabitEthernet1/0/1                ALTE  FORWARDING  NONE

 2        GigabitEthernet1/0/2                DESI  FORWARDING  NONE

 2        GigabitEthernet1/0/3                ROOT  FORWARDING  NONE

# Display brief spanning tree information on Device B.

[DeviceB] display stp brief

 MST ID   Port                                Role  STP State   Protection

 0        GigabitEthernet1/0/1                DESI  FORWARDING  NONE

 0        GigabitEthernet1/0/2                DESI  FORWARDING  NONE

 0        GigabitEthernet1/0/3                ROOT  FORWARDING  NONE

 1        GigabitEthernet1/0/1                DESI  FORWARDING  NONE

 1        GigabitEthernet1/0/2                ALTE  FORWARDING  NONE

 1        GigabitEthernet1/0/3                ROOT  FORWARDING  NONE

 2        GigabitEthernet1/0/1                DESI  FORWARDING  NONE

 2        GigabitEthernet1/0/2                DESI  FORWARDING  NONE

 2        GigabitEthernet1/0/3                DESI  FORWARDING  NONE

# Display brief spanning tree information on Device C.

[DeviceC] display stp brief

 MST ID   Port                                Role  STP State   Protection

 0        GigabitEthernet1/0/1                ROOT  FORWARDING  NONE

 0        GigabitEthernet1/0/2                ALTE  DISCARDING  NONE

 1        GigabitEthernet1/0/1                ROOT  FORWARDING  NONE

 1        GigabitEthernet1/0/2                DESI  DISCARDING  NONE

 2        GigabitEthernet1/0/1                DESI  DISCARDING  NONE

 2        GigabitEthernet1/0/2                ROOT  FORWARDING  NONE

# Display brief spanning tree information on Device D.

[DeviceD] display stp brief

 MST ID   Port                                Role  STP State   Protection

 0        GigabitEthernet1/0/1                ALTE  DISCARDING  NONE

 0        GigabitEthernet1/0/2                ROOT  FORWARDING  NONE

 1        GigabitEthernet1/0/1                ALTE  DISCARDING  NONE

 1        GigabitEthernet1/0/2                ROOT  FORWARDING  NONE

 2        GigabitEthernet1/0/1                ROOT  FORWARDING  NONE

 2        GigabitEthernet1/0/2                ALTE  DISCARDING  NONE

Based on the output, the topology for each MSTI is shown in Figure 3.

Figure 3 MSTI topologies

2.     Verify that the network can accommodate topology changes:

# Shut down GigabitEthernet 1/0/1 on Device C.

[DeviceC] interface gigabitethernet 1/0/1

[DeviceC-GigabitEthernet1/0/1] shutdown

# Display brief spanning tree information on all devices.

[DeviceA] display stp brief

 MST ID   Port                                Role  STP State   Protection

 0        GigabitEthernet1/0/2                DESI  FORWARDING  NONE

 0        GigabitEthernet1/0/3                DESI  FORWARDING  NONE

 1        GigabitEthernet1/0/2                DESI  FORWARDING  NONE

 1        GigabitEthernet1/0/3                DESI  FORWARDING  NONE

 2        GigabitEthernet1/0/2                DESI  FORWARDING  NONE

 2        GigabitEthernet1/0/3                ROOT  FORWARDING  NONE

[DeviceB] display stp brief

 MST ID   Port                                Role  STP State   Protection

 0        GigabitEthernet1/0/1                DESI  FORWARDING  NONE

 0        GigabitEthernet1/0/2                DESI  FORWARDING  NONE

 0        GigabitEthernet1/0/3                ROOT  FORWARDING  NONE

 1        GigabitEthernet1/0/1                DESI  FORWARDING  NONE

 1        GigabitEthernet1/0/2                DESI  FORWARDING  NONE

 1        GigabitEthernet1/0/3                ROOT  FORWARDING  NONE

 2        GigabitEthernet1/0/1                DESI  FORWARDING  NONE

 2        GigabitEthernet1/0/2                DESI  FORWARDING  NONE

 2        GigabitEthernet1/0/3                DESI  FORWARDING  NONE

[DeviceC] display stp brief

 MST ID   Port                                    Role  STP State   Protection

 0        GigabitEthernet1/0/2                ROOT  FORWARDING  NONE

 1        GigabitEthernet1/0/2                ROOT  FORWARDING  NONE

 2        GigabitEthernet1/0/2                ROOT  FORWARDING  NONE

[DeviceD] display stp brief

 MST ID   Port                                Role  STP State   Protection

 0        GigabitEthernet1/0/1                ALTE  DISCARDING  NONE

 0        GigabitEthernet1/0/2                ROOT  FORWARDING  NONE

 1        GigabitEthernet1/0/1                ALTE  DISCARDING  NONE

 1        GigabitEthernet1/0/2                ROOT  FORWARDING  NONE

 2        GigabitEthernet1/0/1                ROOT  FORWARDING  NONE

 2        GigabitEthernet1/0/2                ALTE  DISCARDING  NONE

Based on the output, the topology for each MSTI is shown in Figure 4.

Figure 4 MSTI topologies

Configuration files

·     Device A:

#

vlan 1

#

vlan 11 to 30

#

stp region-configuration

 region-name test

 instance 1 vlan 11 to 20

 instance 2 vlan 21 to 30

 active region-configuration

#

 stp instance 0 to 1 root primary

 stp global enable

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 11 to 30

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 11 to 30

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 11 to 30

·     Device B:

#

vlan 1

#

vlan 11 to 30

#

stp region-configuration

 region-name test

 instance 1 vlan 11 to 20

 instance 2 vlan 21 to 30

 active region-configuration

#

 stp instance 0 root secondary

 stp instance 2 root primary

 stp global enable

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 11 to 30

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 11 to 30

#

interface GigabitEthernet1/0/3

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 11 to 30

·     Device C:

#

vlan 1

#

vlan 11 to 30

#

stp region-configuration

 region-name test

 instance 1 vlan 11 to 20

 instance 2 vlan 21 to 30

 active region-configuration

#

 stp global enable

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 11 to 30

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 11 to 30

·     Device D:

#

vlan 1

#

vlan 11 to 30

#

stp region-configuration

 region-name test

 instance 1 vlan 11 to 20

 instance 2 vlan 21 to 30

 active region-configuration

#

 stp instance 0 priority 36864

 stp global enable

#

interface GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 11 to 30

#

interface GigabitEthernet1/0/2

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 11 to 30

Related documentation

·     Spanning tree configuration in the Layer 2—LAN switching configuration guide for the device.

·     Spanning tree commands in the Layer 2—LAN switching command reference for the device.

  • Cloud & AI
  • InterConnect
  • Intelligent Computing
  • Security
  • SMB Products
  • Intelligent Terminal Products
  • Product Support Services
  • Technical Service Solutions
All Services
  • Resource Center
  • Policy
  • Online Help
All Support
  • Become a Partner
  • Partner Resources
  • Partner Business Management
All Partners
  • Profile
  • News & Events
  • Online Exhibition Center
  • Contact Us
All About Us
新华三官网