Why is the time of the NTP client greatly different from that on a CE series switch that serves as an NTP server after the NTP clock is synchronized

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An NTP client or NTP server sets the time zone, which cannot be synchronized by NTP. For example, the time on an NTP server is set to Beijing time (UTC+8), but an NTP client uses the system default UTC time zone. Therefore, the clock between the NTP client and NTP server is 8 hours apart after clock synchronization.
You are advised to set the same time zone for the NTP server and NTP client during NTP clock synchronization. Otherwise, the clock between them is greatly different after the synchronization.

Other related questions:
How can the VCN3000 synchronize time from the NTP clock source
Step 1 Log in to the OMU portal of the VCN3000 server as the Admin user. Step 2 Choose Local Configuration > NTP Configuration. Step 3 Set Time-synchronize with the NTP clock source server to Yes. Step 4 Set NTP server IP to the IP address of the NTP clock source server. Step 5 Click OK. After the system displays a message indicating that the server automatically restarts, the server time will automatically time-synchronize with the NTP clock source.

How can I set NTP time synchronization for a camera?
After NTP is enabled for a camera, the camera will automatically time-synchronize with the NTP server. VCN3000 V100R002C00 For DHSDK-, GB/T 28181-, and AXISSDK-compliant cameras, you need to set NTP parameters on camera web pages. For HWSDK-, ONVIF-, and HIKSDK-compliant cameras, you need to enable the NTP time synchronization function on the OMU portal of the access server. After the NTP time synchronization function is enabled, the cameras will automatically time-synchronize with the server. The procedure is as follows: 1. Log in to the OMU portal of the MPU server as the Admin user. 2. Choose Maintenance > Unified Configuration and select the serve to which the camera mounts. 3. Set Module name to SCU and Parameter type to System property, and click Search. 4. In the search results, click Edit in the row where Parameter Name is NTPIPC and set Value to 1. 5. Click Save to enable the camera NTP time synchronization function. VCN3000 V100R001C01: 1. Log in to the server with which the camera synchronizes time as the root user. Note: The default password of the root user is Change_Me. 2. Run the chkconfig ntp command to check whether the NTP service is enabled on the server. If the following information is displayed, the NTP service has been enabled: ntp on Note: If a VMU two-node cluster is deployed, verify that the NTP service is enabled on both the active and standby nodes. If the NTP service has been enabled, go to step 3. If the NTP service is disabled, run the /etc/init.d/ntp restart command to enable the NTP service and go to the next step. 3. Change the NTP server IP address of the camera. If the Driver parameter of the camera is set to TEYES, skip this step. If the Driver parameter of the camera is set to T28181, DHSDK, or AXISSDK, log in to the camera web page and change the NTP server IP address to the server IP address. If the Driver parameter of the camera is set to HWSDK, HIKSDK, or ONVIF, perform the following steps: a. Log in to the C/S client. b. Choose Devices > Local Domain. c. Double-click the camera. The Configuration window is displayed. d. Choose System Settings > Time Settings. e. Enable the NTP and enter the NTP server IP address. f. Click OK.

Can NTP be used to change clocks on S series switches
The Network Time Protocol (NTP) is used to synchronize clocks of the distributed time server and a client. You can configure NTP on a switch to synchronize the clock of the switch with that of the NTP server.

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