Simple Network Time Protocol (SNTP) Commands

This section describes the commands you use to automatically configure the system time and date by using SNTP.

sntp broadcast client poll-interval

This command sets the poll interval for SNTP broadcast clients in seconds as a power of two where <poll-interval> can be a value from 6 to 16.

• Default: 6
• Format: sntp broadcast client poll-interval <poll-interval>
• Mode: Global Config

no sntp broadcast client poll-interval

This command resets the poll interval for SNTP broadcast client back to the default value.

• Format: no sntp broadcast client poll-interval
• Mode: Global Config

sntp client mode

This command enables Simple Network Time Protocol (SNTP) client mode and may set the mode to either broadcast or unicast.

• Default: disabled
• Format: sntp client mode [broadcast | unicast]
• Mode: Global Config

no sntp client mode

This command disables Simple Network Time Protocol (SNTP) client mode.

• Format: no sntp client mode
• Mode: Global Config

sntp client port

This command sets the SNTP client port id to a value from 1-65535.The default value is 0, which means that the SNTP port is not configured by the user. In the default case, the actual client port value used in SNTP packets is assigned by the underlying OS.

• Default: 0
• Format: sntp client port <portid>
• Mode: Global Config

no sntp client port

This command resets the SNTP client port back to its default value.

• Format: no sntp client port
• Mode: Global Config

sntp unicast client poll-interval

This command sets the poll interval for SNTP unicast clients in seconds as a power of two where <poll-interval> can be a value from 6 to 16.

• Default: 6
• Format: sntp unicast client poll-interval <poll-interval>
• Mode: Global Config

no sntp unicast client poll-interval

This command resets the poll interval for SNTP unicast clients to its default value.

• Format: no sntp unicast client poll-interval
• Mode: Global Config

sntp unicast client poll-timeout

This command will set the poll timeout for SNTP unicast clients in seconds to a value from 1-30.

• Default: 5
• Format: sntp unicast client poll-timeout <poll-timeout>
• Mode: Global Config

no sntp unicast client poll-timeout

This command will reset the poll timeout for SNTP unicast clients to its default value.

• Format: no sntp unicast client poll-timeout
• Mode: Global Config

sntp unicast client poll-retry

This command will set the poll retry for SNTP unicast clients to a value from 0 to 10.

• Default: 1
• Format: sntp unicast client poll-retry <poll-retry>
• Mode: Global Config

no sntp unicast client poll-retry

This command will reset the poll retry for SNTP unicast clients to its default value.

• Format: no sntp unicast client poll-retry
• Mode: Global Config

sntp server

This command configures an SNTP server (a maximum of three). The optional priority can be a value of 1-3, the version a value of 1-4, and the port id a value of 1-65535.

• Format: sntp server <ipaddress> [<priority> [<version> [<portid>]]]
• Mode: Global Config

no sntp server

This command deletes an server from the configured SNTP servers.

• Format: no sntp server remove <ipaddress>
• Mode: Global Config

show sntp

This command is used to display SNTP settings and status.

• Format: show sntp
• Mode: Privileged EXEC

The display parameters for above command are:

• Last Update Time: Time of last clock update.
• Last Attempt Time: Time of last transmit query (in unicast mode).
• Last Attempt Status: Status of the last SNTP request (in unicast mode) or unsolicited message (in broadcast mode).
• Broadcast Count: Current number of unsolicited broadcast messages that have been received and processed by the SNTP client since last reboot.
• Multicast Count: Current number of unsolicited multicast messages that have been received and processed by the SNTP client since last reboot

show sntp client

This command is used to display SNTP client settings.

• Format: show sntp client
• Mode: Privileged EXEC

The display parameters for above command are:

• Client Supported Modes: Supported SNTP Modes (Broadcast, Unicast, or Multicast).
• SNTP Version: The highest SNTP version the client supports
• Port SNTP: Client Port
• Client Mode: Configured SNTP Client Mode

show sntp server

This command is used to display SNTP server settings and configured servers.

• Format: show sntp server
• Mode: Privileged EXEC

The display parameters for above command are:

• Server IP Address: IP address of configured SNTP Server
• Server Type Address: Type of Server.
• Server Stratum: Claimed stratum of the server for the last received valid packet.
• Server Reference ID: Reference clock identifier of the server for the last received valid packet.
• Server Mode: SNTP Server mode.
• Server Maximum Entries: Total number of SNTP Servers allowed.
• Server Current Entries: Total number of SNTP configured.

For each configured server:

• IP Address: IP address of configured SNTP Server.
• Address Type Address: Type of configured SNTP server.
• Priority: IP priority type of the configured server.
• Version SNTP: Version number of the server. The protocol version used to query the server in unicast mode.
• Port: Server Port Number
• Last Attempt: Time Last server attempt time for the specified server.
• Last Update Status: Last server attempt status for the server.
• Total Unicast Requests: Number of requests to the server.
• Failed Unicast Requests: Number of failed requests from server.