set protocols spanning-tree mstp interface root-guard

The set protocols spanning-tree mstp interface root-guard command is used to enable or disable root guard function for MSTP.

Command Syntax

set protocols spanning-tree mstp interface <interface-name> root-guard <true | false>

Parameter

Parameter

Description

interface <interface-name>

Specifies the interface name.

root-guard <true | false>

Enables or disables root guard function for MSTP. The value could be true or false.

true: enables root guard function for MSTP.
false: disables root guard function for MSTP.

By default, root guard function for MSTP is disabled.

Usage Guidelines

If a port is enabled with the root guard function, its port role on all instances can only be the designated port. Once the port that is enabled with root guard receives BPDUs with a higher priority, the port enters the Discarding state and does not forward packets. If the port does not receive any BPDUs with a higher priority for a long time, the port automatically returns to the Forwarding state.

Example

Enable root guard function for MSTP on port ge-1/1/1.

admin@Xorplus# set protocols spanning-tree mstp interface ge-1/1/1 root-guard true