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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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What Are the MSTP Port States and How Are Packets Processed on Ports in Each State?

What Are the MSTP Port States and How Are Packets Processed on Ports in Each State?

An MSTP port can be in Forwarding, Learning, or Discarding state. The following table lists the processing of packets on ports in these states.

Table 29-58  MSTP port states

Port State

Description

Forwarding

A port in Forwarding state can forward user traffic and process BPDUs.

Learning

This is a transitional state. When a port is in Learning state, it can send and receive BPDUs, but does not forward user traffic. The device creates MAC address entries based on user traffic received on the port but does not forward user traffic through the port.

Discarding

A port in the Discarding state can only receive BPDUs.

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Updated: 2019-05-10

Document ID: EDOC1000079719

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