Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

Example of the msti Command

Dell(conf)#protocol spanning-tree mstp
                                 Dell(conf-mstp)#
                                 msti 1 vlan 100
                                 Dell(conf-mstp)#msti 2 vlan 200-300
                                 Dell(conf-mstp)#show config
                                 !
                                 protocol spanning-tree mstp
                                 no disable
                                 MSTI 1 VLAN 100
                                 MSTI 2 VLAN 200-300
                              

All bridges in the MSTP region must have the same VLAN-to-instance mapping.

To view which instance a VLAN is mapped to, use the show spanning-tree mst vlan command from EXEC Privilege mode.

To view the forwarding/discarding state of the ports participating in an MSTI, use the show spanning-tree msti command from EXEC Privilege mode.

Dell#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 TenGig 1/21
                                 Port 374 (TenGigabitEthernet 1/21) is root Forwarding
                                 Port path cost 2000, 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 2000
                                 Number of transitions to forwarding state 1
                                 BPDU (MRecords): sent 93671, received 46843
                                 The port isnot in the Edge port mode, bpdu filter is disabled
                                 Port 384 (TenGigabitEthernet 1/31) is alternate Discarding
                                 Port path cost 2000, 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 2000
                                 Number of transitions to forwarding state 1
                                 BPDU (MRecords): sent 39291, received 7547
                                 The port isnot in the Edge port mode, bpdu filter is disabled