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Fat AP and Cloud AP V200R010C00 Command Reference

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stp root-protection

stp root-protection


The stp root-protection command enables root protection at the current port.

The undo stp root-protection command restores the default setting of root protection.

By default, root protection is disabled at all ports.


stp root-protection

undo stp root-protection




GE interface view, Eth-Trunk interface view, XGE interface view, MultiGE interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Owning to incorrect configurations or malicious attacks on the network, a root bridge may receive BPDUs with a higher priority. Consequently, the root bridge is no longer able to serve as the root bridge, and the network topology is changed, triggering a spanning tree recalculation. This spanning tree recalculation may transfer traffic from high-speed links to low-speed links, causing traffic congestion.

If a designated port is enabled with the root protection function, the port role cannot be changed. Once a designated port that is enabled with root protection 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 before a period (generally two Forward Delay periods) expires, the port automatically enters the Forwarding state.

You can run the stp timer forward-delay command to set the Forward Delay period.


The root protection function takes effect only on a designated port. In addition, configuring the root protection function on a port that functions as the designated port in all instances is recommended.

If the stp root-protection command is run on other types of ports, the root protection function does not take effect.

Loop protection and root protection cannot be configured on the same interface simultaneously.


# Enable the root protection function on GE0/0/1.
<Huawei> system-view
[Huawei] interface gigabitethernet 0/0/1
[Huawei-GigabitEthernet0/0/1] stp root-protection
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Updated: 2019-11-21

Document ID: EDOC1100064352

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