Since which version do S series switches support the command to disable the NTP service function

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You can run the ntp-service disable command on an S series switch (except the S1700) in V200R001 or a later version to disable the NTP service function.

Other related questions:
Whether an S series switch supports VRRP
S600-E series switches do not support VRRP. The following lists S series switch product support for VRRP excluding S1700: - S1720: Not supported by S1720GFR; supported by S1720GW-E and S1720GWR-E - S2700: Not supported. - S3700: Not supported by SI series; supported by EI and HI series - S5700: Not supported by SI series; supported by S5720-LI and S5720S-LI, but not supported by other LI series; supported by EI and HI series - S6700: Supported - S7700: Supported - S9700: Supported - S9300: Supported - S12700: Supported

Versions of NTP supported by S series switches
S series switches support NTPv1, NTPv2, NTPv3, and NTPv4. NTPv4 applies to both IPv4 and IPv6 networks. The NTP version does not need to be configured on the NTP server and the packet version depends on that of packets sent by a client: If a client sends a packet in version 3, the server replies with a packet in version 3. If a client sends a packet in version 4, the server replies with a packet in version 4.

Whether S series switches support IPSG
All S series switches except the following support IPSG: S1700 switches S2700-SI switches W series cards of S7700, S9700, and S1270 switches S9300 of earlier versions than V100R002 For switches that do not support IPSG, you can run the mac-address static vlan command to configure static MAC addresses and run the mac-address learning disable command to disable MAC address learning on interfaces to realize a function similar to IPSG.

Can the NTP server function be disabled on an S series switch that functions as a client
You can run the ntp-service server disable command on an S series switch (except the S1700) to disable the NTP server function. Perform the following configuration: [HUAWEI] ntp-service server disable

Enable and disable PoE on an S series switch
Enable or disable the PoE function on S series switches:

1. By default, the PoE function is enabled on an interface
2. Enable or disable PoE power supply.
<HUAWEI>system-view
[HUAWEI]interface gigabitethernet 1/0/0
[HUAWEI-GigabitEthernet1/0/0]undo poe enable  //Disable PoE power supply.
[HUAWEI-GigabitEthernet1/0/0]poe enable       //Enable PoE power supply.

The downlink electrical interfaces of PoE switches support PoE power supply, with up to 30 W power on each interface. The maximum power supply distance is 100 m.
Only ES0D0G48VA00 (S7700)/LE0DG48VEA00 (S9300) cards of modular switches (S7700/S9700/S9300/S12700) support PoE power supply.

If the switch connects to 48 V standard PoE powered devices but cannot negotiate power supply capabilities with the devices, you can run poe force-power on the interfaces to forcibly power on the devices.


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