ntp add
ntp add - Add an NTP server to the list of configured servers
Description:
Add an NTP (Network Time Protocol) server to the list of servers that may be used by the NTP client service to perform time synchronization.
Syntax:
ntp add <clock-name> <server-address>
<clock-name> = <string>
<server-address> = <ip-addr> | <dns-name>
Parameters:
| Parameter | Description |
|---|---|
| clock-name | Unique identifier of a clock. |
| server-address | The IP address or domain name of the NTP server to add. |
ntp delete
ntp delete - Delete an NTP server from the list of configured servers.
Description:
Delete an NTP (Network Time Protocol) server from the list of servers that may be used by the NTP client service to perform time synchronization.
Syntax:
ntp delete <clock-name> <server-address>
<clock-name> = <string>
<server-address> = <ip-addr> | <dns-name>
Parameters:
| Parameter | Description |
|---|---|
| clock-name | Unique identifier of a clock. |
| server-address | The IP address or domain name of the NTP server to add. |
ntp disable
ntp disable - Disable the NTP client service
Description:
Disable the NTP (Network Time Protocol) client service and stop performing time synchronization with an NTP server.
Syntax:
ntp disable <clock-name>
<clock-name> = <string>
Parameters:
| Parameter | Description |
|---|---|
| clock-name | Unique identifier of a clock. |
ntp edit
ntp edit - Modify the NTP client service and the time zone configuration
Description:
Modify the NTP (Network Time Protocol) client service configuration to control how time synchronization with an NTP server is performed. Modify the time zone and daylight saving time configuration.
Syntax: for local clock:
ntp edit <clock-name> { {dscp <0-63>} |
{vlan-priority <0-7>} |
{nbr-messages <1-6>} |
{time-interval <8-256>} |
{tai-offset <decimal>} |
{dst <enable | disable>} |
{utc-hour <(-12)-(+14)>} |
{utc-min <0-59>} |
{dst-hour <0-23>} |
{dst-min <0-59>} |
{dst-start-month <month>} |
{dst-start-week <1-5>} |
{dst-start-day <day>} |
{dst-start-hour <0-23>} |
{dst-start-min <0-59>} |
{dst-end-month <month>} |
{dst-end-week <1-5>} |
{dst-end-day <day>} |
{dst-end-hour <0-23>} |
{dst-end-min <0-59>} }+
<clock-name> = <string>
Parameters:
| Parameter | Description |
|---|---|
| clock-name | Unique identifier of a clock. |
| dscp | The DiffServ Code Point priority to use. |
| vlan-priority | The packet priority set in the VLAN priority bits when using a VLAN. |
| nbr-messages | The number of messages sent to the NTP server during a request. |
| time-interval | The time interval between requests to the NTP server (in seconds). Acceptable values are integers that are factors of two and range from 8 to 256. |
| tai-offset | Offset in seconds to convert UTC time to TAI (Temps Atomique International). |
| dst | For regions of the world implementing Daylight Saving Time, (DST), this can be enabled. Be aware that syslog and other services that timestamp events using the current date and time will be affected during transitions of DST periods. There will possibly be an hour gap or duplicate time stamps because the clock was set back. |
| utc-hour | Hour offset from Coordinated Universal Time. North America would have negative values while Eastern Europe would have positive values. |
| utc-min | Minute offset from Coordinated Universal Time. |
| dst-hour | Daylight Saving Time hour offset. |
| dst-min | Daylight Saving Time minute offset. |
| dst-start-month dst-start-week dst-start-day dst-start-hour dst-start-min |
Period where Daylight Saving Time starts. The events are described as: "the change will take place on the nth (week) of (month) on a (day) at (hour) (min)". To configure the last day of the month, use week=5. |
| dst-end-month dst-end-week dst-end-day dst-end-hour dst-end-min |
Period where daylight saving time ends. The events are described as: "the change will take place on the nth (week) of (month) on a (day) at (hour) (min)". To configure the last day of the month, use week=5. |
ntp enable
ntp enable - Enable selected configured NTP servers
Description:
Select the NTP (Network Time Protocol) server to use when performing time synchronization. Up to two NTP servers may be enabled, but only one will be active at a time. Note that this command also starts the NTP client service.
Syntax: for local clock:
ntp enable <clock-name> <server1-address> [<server2-address>]
<clock-name> = <string>
<server1-address> = <ip-addr> | <dns-name>
<server2-address> = <ip-addr> | <dns-name>
Parameters:
| Parameter | Description |
|---|---|
| clock-name | Unique identifier of a clock. |
| server1-address | The IP address or domain name of the primary NTP server to enable. |
| server2-address | The IP address or domain name of the optional secondary NTP server to enable. |
ntp show
ntp show - Show the current NTP client service configuration and status.
Description:
Show the current NTP (Network Time Protocol) client service configuration and status. Show the time zone configuration.
Syntax:
ntp show <clock-name> [ [ -d [ -D [ -E ] ] ] |
[ -r ] ]
<clock-name> = <string>
Parameters:
| Parameter | Description |
|---|---|
| clock-name | Unique identifier of a clock. |
| -d | Used to display additional information. |
| -D | Used to display servo status information. |
| -E | Used to display stack inbound information. |
| -r | Used to reset ntp peaks. |
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