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Configuration Guide - Ethernet Switching

S7700 and S9700 V200R012C00

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, VLAN aggregation, MUX VLAN, VLAN termination, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, HVRP, and Layer 2 protocol transparent transmission.
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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 have failed and recalculates the spanning tree.

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 cause a waste of network resources. To avoid wasting network resources, set a long timeout interval on a stable network.

If a device does not receive any BPDUs from the upstream device within the timeout interval, spanning tree recalculation is performed. 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: 2019-01-18

Document ID: EDOC1100038843

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