---
title: "MSTP sub-tab (NSR only)"
slug: "mstp-sub-tab-nsr-only"
tags: ["Nodegrid 6.0"]
updated: 2026-05-20T10:23:27Z
published: 2026-05-20T10:23:27Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zpesystems.com/llms.txt
> Use this file to discover all available pages before exploring further.

# MSTP sub-tab (NSR and NSR LITE only)

MSTP (Multiple Spanning Tree Protocol) exchanges BPDU (Bridge Protocol Data Units) to prevent loops in MSTI (Multiple Spanning Tree Instances) and CIST (Common and Internal Spanning Tree). ![](https://cdn.document360.io/763c5fb1-b9af-4ccd-9ad6-cf28ae4cd5a3/Images/Documentation/image-1678463782103.png)

Besides the changes in the MSTP sub-tab, the Spanning Tree Status needs to be enabled under the Global sub-tab, and the STP Status needs to be enabled in the interfaces under the Switch Interfaces sub-tab.

### Add MSTP

1. Go to the *NETWORK::SWITCH::MSTP* page
2. Click **Add** (displays dialog)

![](https://cdn.document360.io/763c5fb1-b9af-4ccd-9ad6-cf28ae4cd5a3/Images/Documentation/image-1678463822417.png)
  1. Enter **MST Instance ID**
  2. Enter**VLAN**
  3. On**Priority** drop-down, select one (0, 4096, 8192, 12288, 16384, 20480, 24594, 28672, 32768, 40960, 45056, 49152, 53248, 57344, 61440)
3. Click **Save**

### Change MST instance port priority and cost

1. Go to the *NETWORK::SWITCH::MSTP* page
2. In the MST Instance column, click an instance number
3. In the Interface column, click the interface name, or select multiple interfaces

![](https://cdn.document360.io/763c5fb1-b9af-4ccd-9ad6-cf28ae4cd5a3/Images/Documentation/image-1693818376303.png)
4. Click **Edit**
5. As needed, make changes to port priority and cost. The lower the priority number, the higher the priority
6. Click **Save**

### Edit MSTP

1. Go to the *NETWORK::SWITCH::MSTP* page
2. In *Interface* column, click a name (displays dialog)
3. As needed, make changes
4. Click **Save**

### Delete MSTP

1. Go to the *NETWORK::SWITCH::MSTP* page
2. In the *MST Interface* column, select the checkbox
3. Click **Delete**
4. On the confirmation dialog, click **OK**

### View MSTP State and MST Role

Go to the *TRACKING**::NETWORK::MSTP* page to view the MSTP State and Role

### Set VLAN/Priority

1. Go to the *NETWORK::SWITCH::MSTP* page
2. In the *MST Interface* column, select the checkbox
3. Click **VLAN/Priority** (displays dialog)
4. Make changes to the MST instance priority, or to the VLANs associated with the MST instance
5. Click **Save**