Technical Documentation

Configuring VSTP (NSM Procedure)

VLAN Spanning Tree Protocol (VSTP) is a spanning tree protocol which creates a loop-free topology in VLANs. VSTP maintains a separate spanning tree instance for each VLAN. Different VLANs can use different spanning tree paths and VSTP can support up to 4094 different spanning tree topologies.

To configure VSTP in NSM:

  1. In the navigation tree select Device Manager > Devices and select the device from the list.
  2. In the configuration tree, expand Protocols.
  3. Select VSTP.
  4. Add/Modify the parameters under the respective tabs as specified in Table 1.
  5. Click one:
    • OK—To save the changes.
    • Cancel—To cancel the modifications.
    • Apply — To apply the protocol settings.

Note: After you make changes to a device configuration, you must push that updated device configuration to the physical security device for those changes to take effect. You can update multiple devices at one time. See Updating Devices for more information.

Table 1: VSTP Configuration Fields

Field

Function

Your Action

VSTP

Comment

Specifies comment for OSPF.
  1. Expand the Protocol tree and select VSTP.
  2. Enter the comment.

Disable

Specifies whether to disable the VSTP configuration.
  1. Expand the Protocol tree and select VSTP.
  2. Specify whether to disable VSTP.

Bridge Priority

The bridge priority determines which bridge is elected as the root bridge. If two bridges have the same path cost to the root bridge, the bridge priority determines which bridge becomes the designated bridge for a LAN segment.

  1. Expand the Protocol tree and select VSTP.
  2. Enter the bridge priority.

Max Age

Specifies the maximum age of received protocol BPDUs.
  1. Expand the Protocol tree and select VSTP.
  2. Enter the max age or select from the list.

Hello Time

The time interval at which the root bridge transmits configuration BPDUs.

  1. Expand the Protocol tree and select VSTP.
  2. Enter the hello time or select from the list.

Forward Delay

Specifies how long a bridge interface remains in the listening and learning states before transitioning to the forwarding state.

  1. Expand the Protocol tree and select VSTP.
  2. Enter the forward delay time or select from the list.

Interface

Specifies the interface to be associated with VSTP.

  1. Expand the Protocol tree.
  2. Select VSTP and expand the tree.
  3. Select Interfaces.
  4. Set up the priority, cost, mode, edge and specify whether the interface has to be disabled.

Traceoptions

Enables you to configure VSTP level tracing options.

  1. Expand the Protocol tree.
  2. Select VSTP and expand the tree.
  3. Select Traceoptions.
  4. Set up the file and flag parameters.

Published: 2009-08-23