Disabling MSTP Configuration
Bridge 1
Disabling MSTP per instance
Bridge1(config-mst)#no bridge 1 instance 2 | Disable spanning tree for MSTP on instance 2 |
Bridge1(config-mst)#no bridge 1 instance 3 | Disable spanning tree for MSTP on instance 3 |
Bridge1(config-mst)#commit | Commit the configure on the node. |
Disabling MSTP globally
Bridge1(config)#no bridge 1 multiple-spanning-tree enable bridge-forward | Disable spanning tree globally for MSTP and keeping the ports in forwarding state. |
Bridge1(config)#commit | Commit the configure on the node. |
Disabling MSTP per port
Bridge1(config)#interface ge2 | Enter interface mode for ge2. |
Bridge1(config-if)#bridge-group 1 spanning-tree disable | Disable spanning tree per port for MSTP and put port on forwarding state. This command disables any type of STP on the port. |
Bridge1(config-if)#commit | Commit the configure on the node. |
Bridge 2
Disabling MSTP per instance
Bridge2(config-mst)#no bridge 1 instance 2 | Disable spanning tree for MSTP on instance 2 |
Bridge2(config-mst)#no bridge 1 instance 3 | Disable spanning tree for MSTP on instance 3 |
Bridge2(config-mst)#commit | Commit the configure on the node. |
Disabling MSTP globally
Bridge2(config)#no bridge 1 multiple-spanning-tree enable bridge-forward | Disable spanning tree globally for MSTP. |
Bridge2(config)#commit | Commit the configure on the node. |
Disabling MSTP per port
Bridge2(config)#interface xe2 | Enter interface mode for xe2. |
Bridge2(config-if)#bridge-group 1 spanning-tree disable | Disable spanning tree per port for MSTP and put port on forwarding state. This command disables any type of STP on the port. |
Bridge2(config-if)#commit | Commit the configure on the node. |
Validation
Bridge 1
Verify MSTP details with the show spanning-tree mst detail command.
#show spanning-tree mst detail
% 1: Bridge up - Spanning Tree Enabled - topology change detected
% 1: CIST Root Path Cost 0 - CIST Root Port 905 - CIST Bridge Priority 32768
% 1: Forward Delay 15 - Hello Time 2 - Max Age 20 - Transmit Hold Count 6 - Max-hops 20
% 1: CIST Root Id 80003417ebfbe9c4
% 1: CIST Reg Root Id 80003417ebfbe9c4
% 1: CIST Bridge Id 800064006ac779a0
% 1: 9 topology change(s) - last topology change Thu Nov 17 15:06:17 2016
% 1: portfast bpdu-filter disabled
% 1: portfast bpdu-guard disabled
% 1: portfast errdisable timeout disabled
% 1: portfast errdisable timeout interval 300 sec
% ge2: Port Number 905 - Ifindex 5001 - Port Id 0x8389 - Role Rootport - State Forwarding
% ge2: Designated External Path Cost 0 -Internal Path Cost 20000
% ge2: Configured Path Cost 20000 - Add type Explicit ref count 2
% ge2: Designated Port Id 0x838a - CIST Priority 128 -
% ge2: CIST Root 80003417ebfbe9c4
% ge2: Regional Root 80003417ebfbe9c4
% ge2: Designated Bridge 80003417ebfbe9c4
% ge2: Message Age 0 - Max Age 20
% ge2: CIST Hello Time 2 - Forward Delay 15
% ge2: CIST Forward Timer 0 - Msg Age Timer 4 - Hello Timer 0 - topo change timer 0
% ge2: forward-transitions 1
% ge2: Version Multiple Spanning Tree Protocol - Received MSTP - Send MSTP
% ge2: No portfast configured - Current portfast off
% ge2: bpdu-guard default - Current bpdu-guard off
% ge2: bpdu-filter default - Current bpdu-filter off
% ge2: no root guard configured - Current root guard off
% ge2: Configured Link Type point-to-point - Current point-to-point
% ge2: No auto-edge configured - Current port Auto Edge off
%
% ge3: Port Number 908 - Ifindex 5004 - Port Id 0x838c - Role Alternate - State Discarding
% ge3: Designated External Path Cost 0 -Internal Path Cost 20000
% ge3: Configured Path Cost 20000 - Add type Explicit ref count 2
% ge3: Designated Port Id 0x838b - CIST Priority 128 -
% ge3: CIST Root 80003417ebfbe9c4
% ge3: Regional Root 80003417ebfbe9c4
% ge3: Designated Bridge 80003417ebfbe9c4
% ge3: Message Age 0 - Max Age 20
% ge3: CIST Hello Time 2 - Forward Delay 15
% ge3: CIST Forward Timer 0 - Msg Age Timer 5 - Hello Timer 1 - topo change timer 0
% ge3: forward-transitions 2
% ge3: Version Multiple Spanning Tree Protocol - Received MSTP - Send MSTP
% ge3: No portfast configured - Current portfast off
% ge3: bpdu-guard default - Current bpdu-guard off
% ge3: bpdu-filter default - Current bpdu-filter off
% ge3: no root guard configured - Current root guard off
% ge3: Configured Link Type point-to-point - Current point-to-point
% ge3: No auto-edge configured - Current port Auto Edge off
% Instance 2: Vlans: 2
% 1: MSTI Root Path Cost 20000 -MSTI Root Port 5001 - MSTI Bridge Priority 32768
% 1: MSTI Root Id 80023417ebfbe9c4
% 1: MSTI Bridge Id 800264006ac779a0
% ge2: Port Number 905 - Ifindex 5001 - Port Id 0x8389 - Role Rootport - State Forwarding
% ge2: Designated Internal Path Cost 0 - Designated Port Id 0x838a
% ge2: Configured Internal Path Cost 20000
% ge2: Configured CST External Path cost 20000
% ge2: CST Priority 128 - MSTI Priority 128
% ge2: Designated Root 80023417ebfbe9c4
% ge2: Designated Bridge 800264006ac779a0
% ge2: Message Age 0
% ge2: Hello Time 2 - Forward Delay 15
% ge2: Forward Timer 0 - Msg Age Timer 4 - Hello Timer 0
% Instance 3: Vlans: 3
% 1: MSTI Root Path Cost 0 -MSTI Root Port 0 - MSTI Bridge Priority 32768
% 1: MSTI Root Id 800364006ac779a0
% 1: MSTI Bridge Id 800364006ac779a0
% ge3: Port Number 908 - Ifindex 5004 - Port Id 0x838c - Role Designated - State Forwarding
% ge3: Designated Internal Path Cost 0 - Designated Port Id 0x838c
% ge3: Configured Internal Path Cost 20000
% ge3: Configured CST External Path cost 20000
% ge3: CST Priority 128 - MSTI Priority 128
% ge3: Designated Root 800364006ac779a0
% ge3: Designated Bridge 800364006ac779a0
% ge3: Message Age 0
% ge3: Hello Time 2 - Forward Delay 15
% ge3: Forward Timer 0 - Msg Age Timer 0 - Hello Timer 1
Verify MSTP configurations when MSTP is enabled globally.
#show running-config
!
bridge 1 protocol mstp
!
Verify MSTP configurations when MSTP is disabled globally.
#show running-config
!
bridge 1 protocol mstp
no bridge 1 multiple-spanning-tree enable bridge-forward
!
Verify MSTP configurations when MSTP instance 2 and 3 is enabled.
#show running-config spanning-tree
!
spanning-tree mst configuration
bridge 1 instance 2
bridge 1 instance 2 vlan 2
bridge 1 instance 3
bridge 1 instance 3 vlan 3
!
interface xe2
bridge-group 1 instance 2
!
interface xe3
bridge-group 1 instance 3
!
• Verify MSTP configurations when MSTP instance 2 is disabled
#show running-config spanning-tree
!
spanning-tree mst configuration
bridge 1 instance 3
bridge 1 instance 3 vlan 3
!
interface ge3
bridge-group 1 instance 3
!
Verify MSTP configurations when spanning-tree is enabled on interface.
#show running-config interface ge2
!
interface ge2
switchport
bridge-group 1
switchport mode access
switchport access vlan 2
bridge-group 1 instance 2
!
Verify MSTP configurations when spanning-tree is disabled on interface.
#show running-config interface ge2
!
interface ge2
switchport
bridge-group 1 spanning-tree disable
switchport mode access
switchport access vlan 2
bridge-group 1 instance 2
Verify MSTP details after disabling spanning-tree on interface ge2 with the show spanning-tree mst details command.
#show spanning-tree mst detail
% 1: Bridge up - Spanning Tree Enabled - topology change detected
% 1: CIST Root Path Cost 0 - CIST Root Port 908 - CIST Bridge Priority 32768
% 1: Forward Delay 15 - Hello Time 2 - Max Age 20 - Transmit Hold Count 6 - Max-hops 20
% 1: CIST Root Id 80003417ebfbe9c4
% 1: CIST Reg Root Id 80003417ebfbe9c4
% 1: CIST Bridge Id 800064006ac779a0
% 1: 10 topology change(s) - last topology change Fri Nov 25 21:21:05 2016
% 1: portfast bpdu-filter disabled
% 1: portfast bpdu-guard disabled
% 1: portfast errdisable timeout disabled
% 1: portfast errdisable timeout interval 300 sec
% ge2: Port Number 905 - Ifindex 5001 - Port Id 0x8389 - Role Disabled - State Forwarding
% ge2: Designated External Path Cost 0 -Internal Path Cost 20000
% ge2: Configured Path Cost 20000 - Add type Explicit ref count 2
% ge2: Designated Port Id 0x838a - CIST Priority 128 -
% ge2: Message Age 0 - Max Age 20
% ge2: CIST Hello Time 2 - Forward Delay 15
% ge2: CIST Forward Timer 0 - Msg Age Timer 4 - Hello Timer 0 - topo change timer 0
% ge2: forward-transitions 2
% ge2: Version Multiple Spanning Tree Protocol - Received MSTP - Send MSTP
% ge2: No portfast configured - Current portfast off
% ge2: bpdu-guard default - Current bpdu-guard off
% ge2: bpdu-filter default - Current bpdu-filter off
% ge2: no root guard configured - Current root guard off
% ge2: Configured Link Type point-to-point - Current point-to-point
% ge2: No auto-edge configured - Current port Auto Edge off
% ge3: Port Number 908 - Ifindex 5004 - Port Id 0x838c - Role Rootport - State Forwarding
% ge3: Designated External Path Cost 0 -Internal Path Cost 20000
% ge3: Configured Path Cost 20000 - Add type Explicit ref count 2
% ge3: Designated Port Id 0x838b - CIST Priority 128 -
% ge3: CIST Root 80003417ebfbe9c4
% ge3: Regional Root 80003417ebfbe9c4
% ge3: Designated Bridge 80003417ebfbe9c4
% ge3: Message Age 0 - Max Age 20
% ge3: CIST Hello Time 2 - Forward Delay 15
% ge3: CIST Forward Timer 0 - Msg Age Timer 4 - Hello Timer 1 - topo change timer 0
% ge3: forward-transitions 3
% ge3: Version Multiple Spanning Tree Protocol - Received MSTP - Send MSTP
% ge3: No portfast configured - Current portfast off
% ge3: bpdu-guard default - Current bpdu-guard off
% ge3: bpdu-filter default - Current bpdu-filter off
% ge3: no root guard configured - Current root guard off
% ge3: Configured Link Type point-to-point - Current point-to-point
% ge3: No auto-edge configured - Current port Auto Edge off
% Instance 2: Vlans: 2
% 1: MSTI Root Path Cost 0 -MSTI Root Port 0 - MSTI Bridge Priority 32768
% 1: MSTI Root Id 800264006ac779a0
% 1: MSTI Bridge Id 800264006ac779a0
% ge2: Port Number 905 - Ifindex 5001 - Port Id 0x8389 - Role Disabled - State Discarding
% ge2: Designated Internal Path Cost 0 - Designated Port Id 0x8389
% ge2: Configured Internal Path Cost 20000
% ge2: Configured CST External Path cost 20000
% ge2: CST Priority 128 - MSTI Priority 128
% ge2: Designated Root 800264006ac779a0
% ge2: Designated Bridge 800264006ac779a0
% ge2: Message Age 0
% ge2: Hello Time 2 - Forward Delay 15
% ge2: Forward Timer 0 - Msg Age Timer 0 - Hello Timer 0
% Instance 3: Vlans: 3
% 1: MSTI Root Path Cost 20000 -MSTI Root Port 5004 - MSTI Bridge Priority 32768
% 1: MSTI Root Id 80033417ebfbe9c4
% 1: MSTI Bridge Id 800364006ac779a0
% ge3: Port Number 908 - Ifindex 5004 - Port Id 0x838c - Role Rootport - State Forwarding
% ge3: Designated Internal Path Cost 0 - Designated Port Id 0x838b
% ge3: Configured Internal Path Cost 20000
% ge3: Configured CST External Path cost 20000
% ge3: CST Priority 128 - MSTI Priority 128
% ge3: Designated Root 80033417ebfbe9c4
% ge3: Designated Bridge 800364006ac779a0
% ge3: Message Age 0
% ge3: Hello Time 2 - Forward Delay 15
% ge3: Forward Timer 0 - Msg Age Timer 4 - Hello Timer 1