Lab 10. MSTP (Multiple Spanning Tree)

SW 2

SW2(config-mst)#int e0/0

SW2(config-if)#no spanning-tree guard root

SW 1 ,SW 2

vlan database

vlan 10 name UJANG

vlan 20 name MAMANG

vlan 30 name UPIN

vlan 40 name IPIN

vlan 50 name WAKWAU

vlan 60 name ENCEP

SW 1

SW1(config-mst)#name IDN

SW1(config-mst)#revision 1

SW1(config-mst)#instance 1 vlan 10,20,30

SW1(config-mst)#instance 2 vlan 40,50,60

SW1(config-mst)#span mst 1 root primary

SW1(config)#span mst 2 root secondary

SW1(config)#interface range e0/0-1

SW1(config-if-range)#switchport trunk encapsulation dot1q

SW1(config-if-range)#switchport mode trunk

SW1(config-if-range)#exit

SW 2

 SW2(config)#spanning-tree mode mst

SW2(config)#spanning-tree mst configuration

SW2(config-mst)#name IDN

SW2(config-mst)#revision 1

SW2(config-mst)#instance 1 vlan 10,20,30

SW2(config-mst)#instance 2 vlan 40,50,60

SW2(config-mst)#span mst 1 root secondary

SW2(config)#span mst 2 root primary

SW2(config)#interface range e0/0-1

SW2(config-if-range)#switchport trunk encap dot1q

SW2(config-if-range)#switchport mode trunk

SW2(config-if-range)#exit  

SW 2

SW2#show spanning-tree mst conf

SW2#show spanning-tree mst configuration

Name [IDN]

Revision 1 Instances configured 3

Instance Vlans mapped

-------- ------------------------------------------------------------------

---

0 1-9,11-19,21-29,31-39,41-49,51-59,61-4094

1 10,20,30

2 40,50,60

SW 1

SW1#show spanning-tree mst 1

##### MST1 vlans mapped: 10,20,30

Bridge address aabb.cc00.0100 priority 24577 (24576 sysid 1)

Root this switch for MST1

Interface Role Sts Cost Prio.Nbr Type

---------------- ---- --- --------- -------- -------------------------------

Et0/0 Desg FWD 2000000 ................... 128.1 P2p

Et0/1 Desg FWD 2000000 ................... 128.2 P2p

SW 2

SW2#show spanning-tree mst 2

##### MST2 vlans mapped: 40,50,60

Bridge address aabb.cc00.0200 priority 24578 (24576 sysid 2)

Root this switch for MST2

Interface Role Sts Cost Prio.Nbr Type

---------------- ---- --- --------- -------- -------------------------------

Et0/0 Desg FWD 2000000....................128.1 P2p

Et0/1 Desg FWD 2000000

128.2 P2p