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