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S12700 V200R010C00 Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring link aggregation, VLANs, Voice VLAN, VLAN mapping, QinQ, GVRP, MAC table, STP/RSTP/MSTP, SEP, and so on.
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Setting the MSTP Timeout Interval

Setting the MSTP Timeout Interval

Context

If a device does not receive any BPDUs from the upstream device within the timeout interval, the device considers the upstream device to be down and triggers spanning tree recalculation.

Sometimes, a device cannot receive the BPDU from the upstream device within the timeout interval because the upstream device is busy. In this case, recalculating the spanning tree will waste network resources. Set a long timeout interval on a stable network to avoid this.

The timeout interval is calculated as follows:

Timeout interval = Hello Time x 3 x Timer Factor

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. (Optional) Run:

    stp process process-id

    The MSTP process view is displayed.

    NOTE:

    Skip this step if you perform configurations in the MSTP process 0.

  3. Run:

    stp timer-factor factor

    The timeout interval is set, specifying how long the upstream device waits for BPDUs.

    By default, the timeout interval is 9 times the Hello timer value.

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Updated: 2019-08-21

Document ID: EDOC1000142081

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