Dell PowerConnect 3424 User Manual page 294

The following is an example of the CLI commands:
console(config)# spanning-tree mst configuration
console(config-mst)# instance 1 add vlan 10-20
console(config-mst)# name region1
console(config-mst)# revision 1
console(config)# spanning-tree mst configuration
console(config-mst)# instance 2 add vlan 21-30
console(config-mst)# name region1
console(config-mst)# revision 1
console(config-mst)# show pending
Pending MST configuration
Name: Region1
Revision: 1
Instance
--------
0
1
2
294
Configuring Switch Information
Vlans Mapped
------------
1-9,31-4094
10-20
21-30