Does the clock work properly after an S series fixed switch is powered off

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If some models and versions of S series fixed switches (except S1700 switches) are powered off, the clock can recover. For some other models and versions, the clock cannot recover. For details, see the following:
- For switches running a version earlier than V100R006:
The system clock of a switch is implemented by the software. The system saves the system clock if the switch is powered off and restarted manually. If the switch is powered off due to a power failure, the system time is restored to the factory setting.
- For switches running V100R006 or V200R001:
The system clock of the S3700HI, S5700HI, or S6700 is implemented by the hardware. The system obtains the clock from the hardware if the switch is powered off and restarted manually. System clocks of other models are implemented by the software. The system saves the system clock if a switch is powered off and restarted manually. If the switch is powered off due to a power failure, the system time is restored to the factory setting.
- For switches running V200R002 and V200R003:
The system clock of the S5700HI or S6700 is implemented by the hardware. The system obtains the clock from the hardware if the switch is powered off and restarted manually. System clocks of other models are implemented by the software. The system saves the system clock if the switch is powered off and restarted manually. If the switch is powered off due to a power failure, the system time is restored to the factory setting.
- For switches running V200R005 or a later version:
The system clock of the S5700 or S6700 is implemented by the hardware. The system obtains the clock from the hardware if the switch is powered off and restarted manually. System clocks of other models are implemented by the software. The system saves the system clock if a switch is powered off and restarted manually. If the switch is powered off due to a power failure, the system time is restored to the factory setting.

Other related questions:
After a stack of S series fixed switches splits, the split stacks merge. Do I need to power off the master and standby switches
You do not need to power off the master and standby switches when stacks of S series fixed switches merge. You are advised to add a new switch to a stack during service idle time. Power off the new switch, configure the stack function on the switch, connect stack cables, and then power on the switch.

Precautions before powering off S series switches
The precautions before powering off an S series switch (except the S1700 switch) include: 1. Save and back up configurations. 2. Switch off the switch or power modules before switching off the external power supply system.

A DSP module does not work properly
The problem may be caused by the following reasons: 1. The DSP DIMM module is not installed or not properly installed. 2. An audio license file is not installed on the system. For details, see the following URL: DSP无法正常工作

GVRP mechanism on S series switch
The Generic Attribute Registration Protocol (GARP) provides a mechanism to propagate attributes so that a protocol entity can register and deregister attributes. The GARP VLAN Registration Protocol (GVRP) is used to register and deregister VLAN attributes. A manually configured VLAN is a static VLAN, and a VLAN created through GVRP is a dynamic VLAN. VLAN registration: adds a port to a VLAN. When a port receives a VLAN attribute declaration, it registers the VLAN specified in the declaration. VLAN deregistration: removes a port from a VLAN. When a port receives a VLAN attribute declaration, it deregisters the VLAN specified in the declaration.

Does the configuration need to be committed after an AP is powered off
After restarting and going online on an AC, a Fit AP automatically obtains configuration from the AC. You do not need to deliver the configuration again or reconfigure the AP.

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