MSTP

[SW-01]

[SW-01]vlan 10 20
[SW-01]int range Ten-GigabitEthernet 1/0/50 to Ten-GigabitEthernet 1/0/52
[SW-01-if-range]port link-type trunk
[SW-01-if-range]port link-mode bridge
[SW-01-if-range]port trunk permit vlan 10 20
[SW-01-if-range]undo shutdown
[SW-01-if-range]quit
[SW-01]
[SW-01]stp region-configuration 
[SW-01-mst-region]region-name TEST
[SW-01-mst-region]instance 1 vlan 10
[SW-01-mst-region]instance 2 vlan 20
[SW-01-mst-region]active region-configuration 
[SW-01-mst-region]quit
[SW-01]
[SW-01]stp instance 0 to 1 root primary 
[SW-01]
[SW-01]stp global enable%Dec 25 16:42:34:851 2023 SW-01 STP/6/STP_DETECTED_TC: Instance 0's port Ten-GigabitEthernet1/0/50 detected a topology change.
%Dec 25 16:42:34:851 2023 SW-01 STP/6/STP_DETECTED_TC: Instance 0's port Ten-GigabitEthernet1/0/51 detected a topology change.

[SW-01]dis stp brief 
 MST ID   Port                                Role  STP State   Protection
 0        Ten-GigabitEthernet1/0/50           DESI  FORWARDING  NONE
 0        Ten-GigabitEthernet1/0/51           DESI  FORWARDING  NONE
 0        Ten-GigabitEthernet1/0/52           DESI  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/50           DESI  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/51           DESI  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/52           DESI  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/50           DESI  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/51           DESI  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/52           DESI  FORWARDING  NONE

[SW-02]

[SW-02]vlan 10 20
[SW-02]interface range Ten-GigabitEthernet 1/0/50 to Ten-GigabitEthernet 1/0/51
[SW-02-if-range]port link-type trunk
[SW-02-if-range]port link-mode bridge
[SW-02-if-range]port trunk permit vlan 10 20
[SW-02-if-range]undo shutdown
[SW-02-if-range]quit
[SW-02]
[SW-02]stp region-configuration 
[SW-02-mst-region]region-name TEST
[SW-02-mst-region]instance 1 vlan 10
[SW-02-mst-region]instance 2 vlan 20
[SW-02-mst-region]active region-configuration 
[SW-02-mst-region]quit
[SW-02]
[SW-02]stp instance 2 root primary 
[SW-02]stp instance 0 root secondary 
[SW-02]
[SW-02]stp global enable 
[SW-02]dis stp brief
 MST ID   Port                                Role  STP State   Protection
 0        Ten-GigabitEthernet1/0/50           DESI  FORWARDING  NONE
 0        Ten-GigabitEthernet1/0/51           DESI  FORWARDING  NONE
 0        Ten-GigabitEthernet1/0/52           ROOT  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/50           DESI  DISCARDING  NONE
 1        Ten-GigabitEthernet1/0/51           DESI  DISCARDING  NONE
 2        Ten-GigabitEthernet1/0/50           DESI  DISCARDING  NONE
 2        Ten-GigabitEthernet1/0/51           DESI  DISCARDING  NONE

[SW-03]

[SW-03]vlan 10 20
[SW-03]interface range Ten-GigabitEthernet 1/0/50 to Ten-GigabitEthernet 1/0/51
[SW-03-if-range]port link-type trunk
[SW-03-if-range]port link-mode bridge
[SW-03-if-range]port trunk permit vlan 10 20
[SW-03-if-range]undo shutdown
[SW-03-if-range]quit
[SW-03]
[SW-03]stp region-configuration 
[SW-03-mst-region]region-name TEST
[SW-03-mst-region]instance 1 vlan 10
[SW-03-mst-region]instance 2 vlan 20
[SW-03-mst-region]active region-configuration 
[SW-03-mst-region]quit
[SW-03]
[SW-03]stp global enable 
[SW-03]dis stp brief
 MST ID   Port                                Role  STP State   Protection
 0        Ten-GigabitEthernet1/0/50           ROOT  FORWARDING  NONE
 0        Ten-GigabitEthernet1/0/51           ALTE  DISCARDING  NONE
 1        Ten-GigabitEthernet1/0/50           MAST  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/51           ALTE  DISCARDING  NONE
 2        Ten-GigabitEthernet1/0/50           MAST  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/51           ALTE  DISCARDING  NONE

[SW-04]

[SW-04]vlan 10 20
[SW-04]interface range Ten-GigabitEthernet 1/0/50 to Ten-GigabitEthernet 1/0/51
[SW-04-if-range]port link-type trunk
[SW-04-if-range]port link-mode bridge
[SW-04-if-range]port trunk permit vlan 10 20
[SW-04-if-range]undo shutdown
[SW-04-if-range]quit
[SW-04]
[SW-04]stp region-configuration 
[SW-04-mst-region]region-name TEST
[SW-04-mst-region]instance 1 vlan 10
[SW-04-mst-region]instance 2 vlan 20
[SW-04-mst-region]active region-configuration 
[SW-04-mst-region]quit
[SW-04]stp instance 0 priority 36864
[SW-04]
[SW-04]stp global enable
[SW-04]dis stp brief
%Dec 25 17:08:31:527 2023 SW-04 STP/6/STP_DETECTED_TC: Instance 0's port Ten-GigabitEthernet1/0/50 detected a topology change.
%Dec 25 17:08:31:527 2023 SW-04 STP/5/STP_NOT_ROOT: The current switch is no longer the root of Instance 1.
%Dec 25 17:08:31:527 2023 SW-04 STP/5/STP_NOT_ROOT: The current switch is no longer the root of Instance 2.
%Dec 25 17:08:31:530 2023 SW-04 STP/6/STP_NOTIFIED_TC: Instance 0's port Ten-GigabitEthernet1/0/51 was notified a topology change.
%Dec 25 17:08:31:531 2023 SW-04 STP/6/STP_NOTIFIED_TC: Instance 0's port Ten-GigabitEthernet1/0/51 was notified a topology change.
%Dec 25 17:08:34:677 2023 SW-04 STP/6/STP_NOTIFIED_TC: Instance 0's port Ten-GigabitEthernet1/0/51 was notified a topology change.

 MST ID   Port                                Role  STP State   Protection
 0        Ten-GigabitEthernet1/0/50           ALTE  DISCARDING  NONE
 0        Ten-GigabitEthernet1/0/51           ROOT  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/50           DESI  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/51           ROOT  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/50           ROOT  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/51           DESI  FORWARDING  NONE

<SW-01>dis stp brief
 MST ID   Port                                Role  STP State   Protection
 0        Ten-GigabitEthernet1/0/50           DESI  FORWARDING  NONE
 0        Ten-GigabitEthernet1/0/51           DESI  FORWARDING  NONE
 0        Ten-GigabitEthernet1/0/52           DESI  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/50           DESI  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/51           DESI  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/52           DESI  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/50           ROOT  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/51           ALTE  DISCARDING  NONE
 2        Ten-GigabitEthernet1/0/52           DESI  FORWARDING  NONE

<SW-02>dis stp brief
 MST ID   Port                                Role  STP State   Protection
 0        Ten-GigabitEthernet1/0/50           DESI  FORWARDING  NONE
 0        Ten-GigabitEthernet1/0/51           DESI  FORWARDING  NONE
 0        Ten-GigabitEthernet1/0/52           ROOT  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/50           ALTE  DISCARDING  NONE
 1        Ten-GigabitEthernet1/0/51           ROOT  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/50           DESI  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/51           DESI  FORWARDING  NONE

<SW-03>dis stp brief
 MST ID   Port                                Role  STP State   Protection
 0        Ten-GigabitEthernet1/0/50           ROOT  FORWARDING  NONE
 0        Ten-GigabitEthernet1/0/51           ALTE  DISCARDING  NONE
 1        Ten-GigabitEthernet1/0/50           ROOT  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/51           DESI  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/50           DESI  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/51           ROOT  FORWARDING  NONE

<SW-04>dis stp brief
 MST ID   Port                                Role  STP State   Protection
 0        Ten-GigabitEthernet1/0/50           ALTE  DISCARDING  NONE
 0        Ten-GigabitEthernet1/0/51           ROOT  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/50           DESI  FORWARDING  NONE
 1        Ten-GigabitEthernet1/0/51           ROOT  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/50           ROOT  FORWARDING  NONE
 2        Ten-GigabitEthernet1/0/51           DESI  FORWARDING  NONE