Must STP be disabled on interfaces running RRPP on an S series switch

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For S series switches (except the S1700), RRPP and STP cannot be configured on the same interface simultaneously. STP is enabled on all interfaces by default. Therefore, before creating an RRPP ring, disable STP on the interfaces to be added to the RRPP ring.

Other related questions:
Can an S series switch running RSTP be connected to another switch running STP
For S (except the S1700) series switches, STP protocols include the STP, RSTP, and MSTP protocols. These protocols are forward compatible and support device interconnection to a certain extent. The following describes the interconnection effects: 1. When an STP device connects to an RSTP device and the RSTP device connects to a port of the STP device, the RSTP mode automatically switches to STP to implement slow convergence. 2. When an RSTP device connects to an MSTP device, the CIST (instance 0) can be used to connect both devices. The connection ports are inter-AS ports. 3. When an MSTP device connects to an STP device and the MSTP device connects to a port of the STP device, the MSTP mode automatically switches to STP to implement slow convergence. Note: When a port whose mode switches to another mode is reconnected to another device, run the stp mcheck command to restore the original mode of the port.

S series switch RRPP configuration methods
For details on how to configure RRPP on S series switches (except S1700), click S1720&S2700&S3700&S5700&S6700&S7700&S9700 Typical Configuration Examples . The configurations on S9300 are the same with those on other models.

Disable STP on the S1728GWR-4P switch
Disable STP on an S1728GWR-4P switch as follows: Perform the following operations to disable STP globally on an S1728GWR-4P switch: 1. Choose Spanning Tree > STP. 2. Select Configure Global from the Step drop-down list box, and Configure from the Action drop-down list box. 3. Deselect Enabled in Spanning Tree. 4. Click Apply. Perform the following operations to disable STP on an interface of an S1728GWR-4P switch: 1. Choose Spanning Tree > STP. 2. Select Configure Inter from the Step drop-down list box, and Configure from the Action drop-down list box. 3. Deselect Enabled in the Spanning Tree column of corresponding interfaces. 4. Click Apply.

Is STP enabled on S series switches by default
For Sx700 series switches (except the S1700) running V100R005 or an earlier version, STP is disabled globally by default, and STP on interfaces is enabled by default. For Sx700 series switches (except the S1700) running V100R006 or a later version, STP is enabled globally and on interfaces by default. For E series switches, STP is enabled globally and on interfaces by default. For S9300 series switches, STP is disabled globally by default, and STP on interfaces is enabled by default. For S5700 switches running V100R005, BPDU is disabled by default, and an interface discards received BPDUs by default. To enable BPDU, run the following commands: [HUAWEI] stp enable [HUAWEI] interface GigabitEthernet 0/0/1 [HUAWEI-GigabitEthernet0/0/1] bpdu enable

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