∙If the device is not enabled with BPDU guard, when a boundary port receives a BPDU from another port, it converts into a non-boundary port. To restore its port role as a boundary port, you need to restart the port.

∙Configure ports that are directly connected to terminals as boundary ports and enable BPDU guard for them. These ports can rapidly transit to the forwarding state, and the network security can be ensured.

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