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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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Can Switches Using RSTP and STP Be Connected?

Can Switches Using RSTP and STP Be Connected?

Switches using RSTP and STP can be connected. STP protocols include the STP, RSTP, and MSTP protocols. These protocols support forward compatibility and connection to a certain extent. The following table describes the connection effects.
Scenario Connection Effect
An STP device connects to an RSTP device. RSTP connects to the STP port, and the mode automatically changes to STP to implement slow convergence.
An RSTP device connects to an MSTP device. The CIST can be connected. That is, instance 0 can be connected. The connection ports are inter-AS ports.
An MSTP device connects to an STP device. MSTP connects to the STP port, and the mode automatically changes to STP to implement slow convergence.
NOTE:
When a port whose mode switches reconnects to another device, the original mode must be restored by running the stp mcheck command.
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Updated: 2019-08-21

Document ID: EDOC1000142081

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