Configuring Spanning Tree Protocol (STP)

Enabling or Disabling the Spanning Tree Protocol (STP)

You can enable or disable STP on the following levels:

•Globally – Affects all ports on the device.

•Port-based VLAN – Affects all ports within the specified port-based VLAN. When you enable or disable STP within a port-based VLAN, the setting overrides the global setting. Thus, you can enable STP for the ports within a port-based VLAN even when STP is globally disabled, or disable the ports within a port-based VLAN when STP is globally enabled.

Enabling or Disabling STP Globally

Use the following methods to enable or disable STP on a device on which you have not configured port-based VLANs.

NOTE: When you configure a VLAN, the VLAN inherits the global STP settings. However, once you begin to define a VLAN, you can no longer configure standard STP parameters globally using the CLI. From that point on, you can configure STP only within individual VLANs.

USING THE CLI

To enable STP for all ports on a device, enter the following command:

HP9300(config)# spanning-tree

Syntax: [no] spanning-tree

USING THE WEB MANAGEMENT INTERFACE

1.Log on to the device using a valid user name and password for read-write access. The System configuration panel is displayed.

2.Select Enable next to Spanning Tree.

NOTE: For information about the Single and Fast checkboxes, see “Single Spanning Tree” on page 5-17and “Fast Uplink Span” on page 5-15.

3.Click Apply to save the changes to the device’s running-config file.

4.Select the Save link at the bottom of the dialog. Select Yes when prompted to save the configuration change to the startup-config file on the device’s flash memory.

Enabling or Disabling STP in a Port-Based VLAN

Use the following procedure to disable or enable STP on a device on which you have configured a port-based VLAN.

USING THE CLI

To enable STP for all ports in a port-based VLAN, enter commands such as the following:

HP9300(config)# vlan 10

HP9300(config-vlan-10)# spanning-tree

Syntax: [no] spanning-tree

USING THE WEB MANAGEMENT INTERFACE

You cannot enable or disable STP on individual VLANs using the Web management interface. Use the procedure in “Enabling or Disabling STP Globally” on page 5-3to enable or disable STP on all the VLANs. If you need STP to be enabled on some VLANs but disabled in other VLANs, use the CLI method above.

5 - 3