Configuration manual
662 | Multiple Spanning Tree Protocol
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Figure 30-3. Mapping VLANs to MSTI Instances
All bridges in the MSTP region must have the same VLAN-to-instance mapping. View to which instance a
VLAN is mapped using the command
show spanning-tree mst vlan from EXEC Privilege mode, as shown
in Figure 30-6.
View the forwarding/discarding state of the ports participating in an MSTI using the command
show
spanning-tree msti
from EXEC Privilege mode, as shown in Figure 30-4.
Figure 30-4. Viewing MSTP Port States
Force10(conf)#protocol spanning-tree mstp
Force10(conf-mstp)#msti 1 vlan 100
Force10(conf-mstp)#msti 2 vlan 200-300
Force10(conf-mstp)#show config
!
protocol spanning-tree mstp
no disable
MSTI 1 VLAN 100
MSTI 2 VLAN 200-300
Force10#show spanning-tree msti 1
MSTI 1 VLANs mapped 100
Root Identifier has priority 32768, Address 0001.e806.953e
Root Bridge hello time 2, max age 20, forward delay 15, max hops 19
Bridge Identifier has priority 32768, Address 0001.e80d.b6d6
Configured hello time 2, max age 20, forward delay 15, max hops 20
Current root has priority 32768, Address 0001.e806.953e
Number of topology changes 2, last change occured 1d2h ago on Gi 1/21
Port 374 (GigabitEthernet 1/21) is root Forwarding
Port path cost 20000, Port priority 128, Port Identifier 128.374
Designated root has priority 32768, address 0001.e806.953e
Designated bridge has priority 32768, address 0001.e806.953e
Designated port id is 128.374, designated path cost 20000
Number of transitions to forwarding state 1
BPDU (MRecords): sent 93671, received 46843
The port is not in the Edge port mode
Port 384 (GigabitEthernet 1/31) is alternate Discarding
Port path cost 20000, Port priority 128, Port Identifier 128.384
Designated root has priority 32768, address 0001.e806.953e
Designated bridge has priority 32768, address 0001.e809.c24a
Designated port id is 128.384, designated path cost 20000
Number of transitions to forwarding state 1
BPDU (MRecords): sent 39291, received 7547
The port is not in the Edge port mode