Allied-telesis AT-S95 CLI Manual de usuario descargar pdf (Pagina 228)

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Allied Telesis

Command Line Interface User’s Guide

spanning-tree guard root

The spanning-tree guard root Interface Configuration (Ethernet, port-channel) mode command enables root

guard on all spanning tree instances on the interface. Root guard prevents the interface from becoming the root

port of the device. Use the no form of this command to disable root guard on the interface.

Syntax

spanning-tree guard root

no spanning-tree guard root

Default Configuration

Root guard is disabled.

Command Mode

Interface Configuration (Ethernet, port-channel) mode

User Guidelines

Root guard can be enabled when the device operates in STP, RSTP and MSTP.

When root guard is enabled, the port changes to the alternate state if spanning-tree calculations selects the port

as the root port.

Example

eThe following example prevents Ethernet port 1/g1 from being the root port of the device.

spanning-tree bpduguard

The spanning-tree bpduguard Interface Configuration (Ethernet, port-channel) mode command shutsdown an

interface when it receives a bridge protocol data unit (BPDU). Use the no form of this command to restore the

default configuration.

Syntax

spanning-tree bpduguard

no spanning-tree bpduguard

Default Configuration

The default configuration is set to disabled.

Command Mode

Interface Configuration (Ethernet, port-channel) mode

User Guidelines

You can enable the command when the spanning tree is enabled (useful when the port is in the PortFast mode) or

disabled.

Console(config) # interface ethernet 1/g1

Console(config-mst) # spanning-tree guard root

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Allied-telesis AT-S95 CLI Manual de usuario Pagina 228