Dell POWEREDGE M1000E - Manual (Page 649)

Configuring the Spanning Tree Protocol 649
MSTP Settings
The Multiple Spanning Tree Protocol (MSTP) supports multiple instances of
Spanning Tree to efficiently channel VLAN traffic over different interfaces.
MSTP is compatible with both RSTP and STP; a MSTP bridge can be
configured to behave entirely as a RSTP bridge or a STP bridge.
To display the MSTP Settings page, click Switching → Spanning Tree →
MSTP Settings in the navigation panel.
Figure 22-11. MSTP Settings