LevelOne ProCon GSW-2690 - Manual (Page 93)

User Manual
Publication date: June, 2005
Revision A1
89
M Check:
Migration Check. It forces the port sending out an RSTP BPDU instead
of a legacy STP BPDU at the next transmission. The only benefit of this
operation is to make the port quickly get back to act as an RSTP port.
Click <M Check> button to send a RSTP BPDU from the port you
specified.
Fig. 3-35