Dell PowerConnect B-RX Configuration Manual page 392

12
IEEE 802.1D Spanning Tree Protocol (STP)
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Enabling or disabling STP globally
Use the following methods to enable or disable STP on the device on which you have not configured
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.
To enable STP for all ports in all VLANs on a device, enter the following command.
BigIron RX(config)# spanning-tree
This command enables a separate spanning tree in each VLAN, including the default VLAN.
Syntax: [no] spanning-tree
Enabling or disabling STP on a VLAN
Use the following procedure to disable or enable STP on a device on which you have configured a
VLAN. Changing the STP state in a VLAN affects only that VLAN.
To enable STP for all ports in a port-based VLAN, enter commands such as the following.
BigIron RX(config)# vlan 10
BigIron RX(config-vlan-10)# spanning-tree
Syntax: [no] spanning-tree
Enabling or disabling STP on a port
Use the following procedure to disable or enable STP on an individual port.
NOTE
If you change the STP state of the primary port in a trunk group, the change affects all ports in the
trunk group.
To enable STP on an individual port, enter commands such as the following.
BigIron RX(config)# interface 1/1
BigIron RX(config-if-e1000-1/1)# spanning-tree
Syntax: [no] spanning-tree
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Individual VLAN – Affects all ports within the specified VLAN. When you enable or disable STP
within a VLAN, the setting overrides the global setting. Thus, you can enable STP for the ports
within a VLAN even when STP is globally disabled, or disable the ports within a port-based
VLAN when STP is globally enabled.
Individual port – Affects only the individual port. However, if you change the STP state of the
primary port in a trunk group, the change affects all ports in the trunk group.
BigIron RX Series Configuration Guide
53-1001810-01