Time Zone & NTP

Atlas 900 Compute Node iBMC (V3.01.00.00 or Later) User Guide 09

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Time Zone & NTP

Function Description

On the Time Zone & NTP page, you can view and configure:

Time zone

NTP information

GUI

Choose iBMC Settings > Time Zone & NTP.

The page shown in Figure 3-54 is displayed.

Figure 3-54 Time Zone & NTP
Click to enlarge

Parameter Description

Table 3-62 Time Zone & NTP

Parameter	Description
Time Zone	Time zone of the iBMC. Set Region and Time Zone based on actual requirements. Default value: Others+GMT NOTE: The time zone information is automatically obtained if Automatically obtain NTP information through DHCPv4 is selected. In the time zones that use daylight saving time (DST), the iBMC automatically adjusts the time one hour forward when the DST starts and adjusts the time backward to standard time when the DST ends. When performing time synchronization on the OS, run the hwclock --utc -w command. This command can ensure consistency between the OS time and the iBMC time.
NTP	This parameter enables or disables the NTP service for the iBMC. After the NTP service is enabled, the iBMC system time is synchronized from the NTP server.
Automatically obtain IPv4 address	Click this option to allow IPv4 address to be automatically allocated for the NTP server. NOTICE: If the IP address of the iBMC management network port is automatically obtained, the NTP information must be automatically obtained.
Automatically obtain IPv6 address	Click this option to allow IPv6 address to be automatically allocated for the NTP server. NOTICE: If the IP address of the iBMC management network port is automatically obtained, the NTP information must be automatically obtained.
Manually set IP address	Click this option to manually set the preferred and alternate NTP servers. NOTICE: If the IP address of the iBMC management network port is set manually, the NTP information must be set manually.
Preferred Server 1 to Preferred Server 3 or Alternate Server 1 to Alternate Server 3	Addresses of NTP servers. Value: an IPv4 or IPv6 address or a domain name NOTE: The domain name must meet the following requirements: Contain 0 to 67 characters. Allow digits, letters, hyphens (-), and dots (.) only. Cannot start with a hyphen or dot, or end with a hyphen. Allow a maximum of 63 characters between any two dots. Either of the following solutions are provided. For details, see the GUI. Solution 1: Three NTP servers are available. The three servers are effective at the same time. Solution 2: Three NTP server groups are available. In each group, the left is the preferred server, and the right is the alternate server. The servers are selected according to the following rules: Select one server from each group. If both addresses in a group are invalid, the server group will be discarded. If there is only one valid address in a group, select the server with the valid address. If both addresses in a group are valid, select the server with the IPv6 address. If both of them are IPv4 or IPv6 addresses, select the preferred server (left one). NOTE: The switchover between the active and standby NTP servers depends on the synchronization interval between the iBMC and the NTP server (Minimum Polling Interval ≤ synchronization interval ≤ Maximum Polling Interval). If the iBMC fails to synchronize with the active server for multiple times, the standby server becomes the NTP server.
Minimum Polling Interval	Minimum interval at which the iBMC system synchronizes time from the NTP server, that is, the minimum interval for polling NTP packets. For example, if this parameter is set to 6, the polling interval is 2 to the power of 6, that is, 1 minute and 4 seconds. Value: 3 to 17
Maximum Polling Interval	Maximum interval at which the iBMC system synchronizes time from the NTP server, that is, the maximum interval for polling NTP packets. For example, if this parameter is set to 6, the polling interval is 2 to the power of 6, that is, 1 minute and 4 seconds. Value: 3 to 17
Server Authentication	Authentication, which can be enabled or disabled, for communication between the server and the NTP server. Default value: Disabled
NTP Group Key	Private key to be uploaded to the iBMC for identity authentication if Server Authentication is enabled. NOTE: You can download a key generator (for example, ntp-keygen) to generate private keys. Only the key files generated by using the SHA256 algorithm can be uploaded. For security purposes, periodically update the key.

Setting the Time Zone

Select a value from Region and Time Zone.
Click Save.
If "Operation Successful" is displayed, the setting is successful.

When performing time synchronization on the OS, run the hwclock --utc -w command. This command can ensure consistency between the OS time and the iBMC time.

Setting NTP Information

In NTP Settings area, set parameters based on service requirements.
For details about the parameters, see Table 3-62.
Click Save.
If "Operation Successful" is displayed, the setting is successful.

Function Description
GUI
Parameter Description
Setting the Time Zone
Setting NTP Information

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Updated: 2023-08-04

Document ID: EDOC1100152759

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