What is the default STP mode for S series switches

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For S (except the S1700) and E series switches, STP works in MSTP mode by default.

Other related questions:
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

Functions of the MODE button on S series switches
The MODE button on S series switches (except the S1700) has the following functions: - For versions earlier than V200R006C10, you can change the indicator to stack mode and show the stack ID. - For V200R006C10 and later versions, you can hold down the MODE button for 6 seconds to start the web initial login mode.

What is the default BootROM password for S series switches
Default BootROM password on S series switches (except S1700 switches): For S series fixed switches running a version earlier than V100R006C03, the default BootROM password is huawei; for fixed switches running V100R006C03 or a later version, the default BootROM password is Admin@huawei.com. For S series modular switches running V100R006C00 or an earlier version, the default BootROM password is 9300; for modular switches running a version later than V100R006C00, the default BootROM password is Admin@huawei.com.

Default link aggregation mode on S series switches
By default, an Eth-Trunk on S series switches (except the S1700) works in manual load balancing mode.

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