NTP server configuration

View each Network Time Protocol (NTP) server configuration on the Sun Secure Application Switch. Creating an NTP server configuration allows synchronization of the Sun Secure Application Switch system clock with other network clocks. This helps ensure accurate data delivery through the network.

Access mode

exec

Syntax

show switchServices ntp server

Output Description

Heading Description Filter
Server ID A unique identifier, and priority, for this NTP server. A value of 1 is the highest priority.

Valid values are from 1 to 5. 		id integer
Server IP Address The IP address for this NTP server. Use 4-byte dotted decimal format. ipAddress ipAddress
Preferred Server Indicates whether this NTP server is the preferred server if two servers show different times. This argument is meaningful only when you configure two servers; if you configure three or more, the NTP function automatically finds the most reliable server.

Valid values: true, false
prefer enumeration
Burst Mode Indicates whether to send NTP requests to this server in burst mode; that is, transmit eight send/receive cycles over a 32-second interval.

Burst mode is useful for initially and quickly calibrating a system clock, but it puts a heavy burden on the NTP server and network. Without burst mode, the system sends one NTP request per minPoll interval, and calibration usually occurs within 5 minutes; with burst mode, calibration takes a few seconds. Always set burst to false for normal system operation.

Valid values: true, false
burst enumeration
Min. Poll Interval The minimum time, in seconds, between time queries sent to this NTP server.
Some NTP time servers restrict clients to no more than 500 requests per day (about one every 3 minutes). Set minPoll according to your server's rules.

Valid values:
  • 16 : Poll the NTP server every 16 seconds.
  • 32 : Poll the NTP server every 32 seconds.
  • 64 : Poll the NTP server every 64 seconds (approximately 1 minute).
  • 128 : Poll the NTP server every 128 seconds (approximately 2 minutes).
  • 256 : Poll the NTP server every 256 seconds (approximately 4 minutes).
  • 512 : Poll the NTP server every 512 seconds (approximately 8.5 minutes).
  • 1024 : Poll the NTP server every 1024 seconds (approximately 17 minutes).
  • 2048 : Poll the NTP server every 2048 seconds (approximately 34 minutes).
  • 4096 : Poll the NTP server every 4096 seconds (approximately 68 minutes).
  • 8192 : Poll the NTP server every 8192 seconds (approximately 2.25 hours).
  • 16384 : Poll the NTP server every 16384 seconds (approximately 4.55 hours).
  • 32768 : Poll the NTP server every 32768 seconds (approximately 9.1 hours).
  • 65536 : Poll the NTP server every 65536 seconds (approximately 18.2 hours).
  • 131072 : Poll the NTP server every 131072 seconds (approximately 36.4 hours).
minPoll enumeration
Max. Poll Interval The maximum time, in seconds, between time queries sent to the NTP server.

Valid values:
  • 16 : Poll the NTP server every 16 seconds.
  • 32 : Poll the NTP server every 32 seconds.
  • 64 : Poll the NTP server every 64 seconds (approximately 1 minute).
  • 128 : Poll the NTP server every 128 seconds (approximately 2 minutes).
  • 256 : Poll the NTP server every 256 seconds (approximately 4 minutes).
  • 512 : Poll the NTP server every 512 seconds (approximately 8.5 minutes).
  • 1024 : Poll the NTP server every 1024 seconds (approximately 17 minutes).
  • 2048 : Poll the NTP server every 2048 seconds (approximately 34 minutes).
  • 4096 : Poll the NTP server every 4096 seconds (approximately 68 minutes).
  • 8192 : Poll the NTP server every 8192 seconds (approximately 2.25 hours).
  • 16384 : Poll the NTP server every 16384 seconds (approximately 4.55 hours).
  • 32768 : Poll the NTP server every 32768 seconds (approximately 9.1 hours).
  • 65536 : Poll the NTP server every 65536 seconds (approximately 18.2 hours).
  • 131072 : Poll the NTP server every 131072 seconds (approximately 36.4 hours).
maxPoll enumeration
NTP Version The NTP version number, which is transmitted in the NTP packets. That is, the setting restricts NTP communication to servers that implement NTP at or below the configured version.

The current NTP standard is version 3, but version 4 has been in development since 1994. Some public NTP servers are running version 4, so we suggest you accept the default, which allows all current and previous versions. You should set a lower version only if your NTP server requires it.

Valid values are from 1 to 4. 		version integer
Stratum The stratum level of server. stratum integer
TX Packets The number of transmitted packets. txPkts counter32
RX Packets The number of received packets. rxPkts counter32
Timeouts The number of response timeouts. timeouts counter32
Dropped Packets The number of packets dropped. droppedPkts counter32
Oper Status The status of the peer.

Valid values:
  • unknown : state of server is unknown.
  • responding : server is responding.
  • notResponding : server is not responding.
operStatus enumeration

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