Dell POWEREDGE M1000E - Manual (Page 650)

650 Configuring the Spanning Tree Protocol
Viewing and Modifying the Instance ID for Multiple VLANs
To configure MSTP settings for multiple VLANS:
1 Open the MSTP Settings page.
2 Click Show All to display the MSTP Settings Table.
Figure 22-12. Configure MSTP Settings
3 For each Instance ID to modify, select the check box in the Edit column in
the row associated with the VLAN.
4 Update the Instance ID settings for the selected VLANs.
5 Click Apply.