# MISTP Instance

Device > Configure > Spanning Tree > Multi Instance Spanning Tree (MISTP)

From this dialog box, you can enable/disable an MISTP instance.

The following data is displayed:

- Index (stpxMISTPInstanceIndex)

- Status (stpxMISTPInstanceEnable)

- VLANs Mapped (stpxMISTPInstanceVlansMapped)

The following list specifies buttons in this dialog box, as well as their function:

- Click OK to continue.

- Click Apply to save the changes in the dialog box.

- Click Modify Mapping to launch the MISTP-VLAN Mapping dialog box and change the settings for the selected mapping.

- Click Refresh to update the contents of the dialog box.

- Click Cancel to close the dialog box.

- Click Print to print the contents of the dialog box.

- Click Help to access online help.

Index (stpxMISTPInstanceIndex)

An arbitrary integer, within the range 1 to 16, that represents the value of the Instance Number (stpxMISTPInstanceNumber) and that uniquely identifies an instance.

Status (stpxMISTPInstanceEnable)

Indicates whether the MISTP protocol is currently enabled on the MISTP instance.

VLANs Mapped (stpxMISTPInstanceVlansMapped)

A string of octets containing one bit per VLAN. The first octet corresponds to VLANs with VlanIndex values of 0 through 7; the second octet to VLANs 8 through 15; etc.

Note: Extended range VLAN values (1025-4094) are supported by Catalyst 4000 devices running Catalyst OS version 7.2 or later and Catalyst 6000 devices running Catalyst OS version 6.1 or later.