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Dell Configuration Guide for the S4048–ON System 9.14.2.4

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MSTP Sample Configurations

The running-configurations support the topology shown in the following illustration.

Router 1 Running-Configuration

The configurations are from Dell EMC Networking OS systems.
Figure 1. MSTP with Three VLANs Mapped to Two Spanning Tree Instances
Illustration of MSTP with three VLANs mapped to two spanning tree instances.
This example uses the following steps:
  1. Enable MSTP globally and set the region name and revision map MSTP instances to the VLANs.
  2. Assign Layer-2 interfaces to the MSTP topology.
  3. Create VLANs mapped to MSTP instances tag interfaces to the VLANs.
(Step 1)
protocol spanning-tree mstp
  no disable
  name Tahiti
  revision 123
  MSTI 1 VLAN 100
  MSTI 2 VLAN 200,300
!
(Step 2)
interface TenGigabitEthernet 1/21
  no ip address
  switchport
  no shutdown
!
interface TenGigabitEthernet 1/31
  no ip address
  switchport
  no shutdown
!
(Step 3)
interface Vlan 100
  no ip address
  tagged TenGigabitEthernet 1/21,31
  no shutdown
!
interface Vlan 200
  no ip address
  tagged TenGigabitEthernet 1/21,31
  no shutdown
!
interface Vlan 300
  no ip address
  tagged TenGigabitEthernet 1/21,31
  no shutdown
This example uses the following steps:
  1. Enable MSTP globally and set the region name and revision map MSTP instances to the VLANs.
  2. Assign Layer-2 interfaces to the MSTP topology.
  3. Create VLANs mapped to MSTP instances tag interfaces to the VLANs.
(Step 1)
protocol spanning-tree mstp
  no disable
  name Tahiti
  revision 123
  MSTI 1 VLAN 100
  MSTI 2 VLAN 200,300
!
(Step 2)
interface TenGigabitEthernet 2/11
  no ip address
  switchport
  no shutdown
!
interface TenGigabitEthernet 2/31
  no ip address
  switchport
  no shutdown
!
(Step 3)
interface Vlan 100
  no ip address
  tagged TenGigabitEthernet 2/11,31
 no shutdown
!
interface Vlan 200
  no ip address
  tagged TenGigabitEthernet 2/11,31
  no shutdown
!
interface Vlan 300
  no ip address
  tagged TenGigabitEthernet 2/11,31
  no shutdown
This example uses the following steps:
  1. Enable MSTP globally and set the region name and revision map MSTP instances to the VLANs.
  2. Assign Layer-2 interfaces to the MSTP topology.
  3. Create VLANs mapped to MSTP instances tag interfaces to the VLANs.
(Step 1)
protocol spanning-tree mstp
  no disable
  name Tahiti
  revision 123
  MSTI 1 VLAN 100
  MSTI 2 VLAN 200,300
!
(Step 2)
interface TenGigabitEthernet 3/11
  no ip address
  switchport
  no shutdown
!
interface TenGigabitEthernet 3/21
  no ip address
  switchport
  no shutdown
!
(Step 3)
interface Vlan 100
  no ip address
  tagged TenGigabitEthernet 3/11,21
  no shutdown
!
interface Vlan 200
  no ip address
  tagged TenGigabitEthernet 3/11,21
  no shutdown
!
interface Vlan 300
  no ip address
  tagged TenGigabitEthernet 3/11,21
  no shutdown
This example uses the following steps:
  1. Enable MSTP globally and set the region name and revision map MSTP instances to the VLANs.
  2. Assign Layer-2 interfaces to the MSTP topology.
  3. Create VLANs mapped to MSTP instances tag interfaces to the VLANs.
(Step 1)
spanning-tree
spanning-tree configuration name Tahiti
spanning-tree configuration revision 123
spanning-tree MSTi instance 1
spanning-tree MSTi vlan 1 100
spanning-tree MSTi instance 2
spanning-tree MSTi vlan 2 200
spanning-tree MSTi vlan 2 300

(Step 2)
interface 1/0/31
  no shutdown
  spanning-tree port mode enable
  switchport protected 0
exit

interface 1/0/32
  no shutdown
  spanning-tree port mode enable
  switchport protected 0
exit

(Step 3)
interface vlan 100
  tagged 1/0/31
  tagged 1/0/32
exit

interface vlan 200
  tagged 1/0/31
  tagged 1/0/32
exit

interface vlan 300
  tagged 1/0/31
  tagged 1/0/32
exit

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