stp dispute-protection

Use stp dispute-protection to enable dispute guard.

Use undo stp dispute-protection to disable dispute guard.

Syntax

stp dispute-protection

undo stp dispute-protection

Default

Dispute guard is enabled.

Views

System view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

Dispute guard blocks a port to prevent loops when a unidirectional link is detected on the port by the spanning tree feature.

In some VLAN networks, an uplink port on a downstream device is configured to deny packets from the PVID. As a result, the downstream device cannot receive BPDUs of the PVID from the upstream device. However, the upstream device can receive BPDUs from the downstream device. In this case, dispute guard blocks the receiving port on the upstream device, which causes traffic interruption.

To ensure service continuity and prevent the link from being blocked, you can disable dispute guard by using the undo stp dispute-protection command.

Examples

# Disable dispute guard.

<Sysname> system-view
[Sysname] undo stp dispute-protection