I have a switch with the following config:
#spantree
set spantree mstcfgid cfgname 'SP4' rev 1
set spantree msti sid 2 create
set spantree msti sid 3 create
set spantree msti sid 4 create
set spantree msti sid 5 create
set spantree mstmap 9 sid 5
set...
