SNTP

System > SNTP > SNTP Settings

• SNTP Admin Status—select the SNTP client module status. The default option is Disabled. The list contains:
  • Enabled—enables the SNTP client module. On enabling, the server starts sending the request to the host for synchronization.
  • Disabled—Disables the SNTP client module.
  Note:

  All configurations are active only when the SNTP module is enabled.

• Client Version—select the SNTP client module version. The default option is Version 4. The list contains:
  • Version 1—sets the SNTP client version as Version 1.
  • Version 2—sets the SNTP client version as Version 2.
  • Version 3—sets the SNTP client version as Version 3.
  • Version 4—sets the SNTP client version as Version 4.
  Note: All SNTP requests are sent out with the current configured version number. When required, the administrator can change the current version number.
• Addressing Mode—select the SNTP client addressing mode. The default option is Unicast. The list contains:
  • Unicast—SNTP client operates in a point-to-point fashion. A unicast client sends a request to a designated server at its unicast address and expects a reply from which it can determine the time and, optionally, the round-trip delay and local clock offset relative to the server.
  • Broadcast—SNTP client operates in a point-to-multipoint fashion. The SNTP server uses an IP local broadcast address instead of a multicast address. The broadcast address is scoped to a single subnet, while a multicast address has Internet wide scope.
  • Multicast—SNTP client operates in point-to-multipoint fashion. The SNTP server uses a multicast group address to send unsolicited SNTP messages to clients. The client listens on this address and sends no requests for updates.
  • Manycast—SNTP client operates in a multipoint-to-point fashion. The SNTP client sends a request to a designated IPv4 or IPv6 local broadcast address or multicast group address. One or more anycast servers reply with their individual unicast addresses
• SNTP Client Port—select the time display format. The default option is Hours. The list contains:
• Time Display Format—enter the username.
  • Hours—Sets the time display as 24 hours format.
  • Am/Pm—Sets the time display as 12 hours am/pm format.

• AuthKey Id—enter the key identifier identifying the cryptographic key used to generate the message-authentication code:
  Note:

  This field is greyed out when addressing mode is Broadcast, Multicast and Manycast.

• AuthKey Algorithm—select the SNTP authentication algorithm. The default authentication algorithm is None. The list contains:
  • None—the communication will be opened, and no authorization will be provided.
  • md5—MD5 (Message Digest-5) verifies data integrity. MD5 is intended for use with digital signature applications, which requires that large files must be compressed by a secure method before being encrypted with a secret key, under a public key cryptosystem.
  Note:

  This field is greyed out when addressing mode is Broadcast, Multicast and Manycast.

• AuthKey—enter the key identifier identifying the cryptographic key used to generate the message-authentication code.
  Note:

  This field is greyed out when addressing mode is Broadcast, Multicast and Manycast.

• TimeZone—enter the system time zone with respect to UTC. The format is (+/-) HH:MM. Where:
  • +/—denotes the difference with the Greenwich Mean Time. + indicates forward time zone and—indicates backward time zone.
  • HH denotes the hours. It is 24-hour format with value ranging from 00 to 23.
  • mm denotes the minutes. The value ranges from 00 to 59. For example, the valid value is +05:30.

• DST Start Time—enter the DST (Daylight Saving Time) start time. The format is weekofmonth-weekofday-month, HH:MM. Where:
  • weekofmonth denotes the particular week. The valid values are First, Second, Third, Fourth and Last
  • weekofday denotes the day in the specified week. The valid values are Sun, Mon, Tue, Wed, Thu, Fri and Sat.
  • month denotes the month for which the specified week and day are applicable. The valid values are Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
  • HH denotes the hours. It is 24-hour format with value ranging from 00 to 23.
  • mm denotes the minutes. The value ranges from 00 to 59. For example, the valid value is First-Sun-Jan, 23:45.

• Apply—adds and saves a new configuration.
• Refresh—refreshes the screen.

System > SNTP > Unicast

• Select—select the server address for which the configuration need to be modified or deleted.
• Forward Address Type—select the address type of the unicast server in the Unicast addressing mode. IPv4—Sets the address type of the unicast server as Internet Protocol Version 4.
• unicast serverip addr—enter the unicast ipv4/ipv6 server address in the unicast addressing mode.
• server port—enter the sntp port on which the server is up. the value ranges between 123, 1025 to 65535. the default value is 123.
• SNTP Version—the SNTP version supported by the server. The list contains:
  • Version 3—Sets the SNTP version as version 3.
  • Version 4– Sets the SNTP version as version
  4.
• Unicast Server Type—select the Unicast server type. This flag is to distinguish between primary and secondary server. SNTP client sends request to different servers until it receives successful response. This flag tells the order in which to query the servers. The list contains:
  • Primary—sets the unicast server type as primary server
  • Secondary—sets the unicast server type as secondary server
• Last Updated—specifies the local time when the configuration was successful.
• Tx Requests—specifies the number of SNTP requests sent in unicast addressing mode.

• Add—adds and saves new configuration.
• Reset—resets to default value for respective fields and discards all user inputs.
• Apply—modifies attributes and saves the changes.
• Delete—deletes the selected entry.
• Refresh—refreshes the screen.

System > SNTP > Broadcast

• Request InBcast Mode—select the SNTP send request status in Broadcast mode. The default option is Disabled. The list contains:
  • Enabled—sends the SNTP request to the broadcast server to calculate the delay time.
  • Disabled—does not send the SNTP request.
• POLL Timeout InBcastMode—enter the number of seconds to wait for a response from a POLL Timeout InBcast SNTP server before considering the attempt to have timed out. This value ranges from 1 to 30 seconds. The default value is 5 seconds.
• Delay Time InBcast Mode—enter the delay time when there is no response from the broadcast server. This value ranges from 1000 to 15000 microseconds. The default value is 8000 microseconds.
• Primary Addr InBcast Mode—enter the primary server IP address learnt in Broadcast addressing mode. The default address is 0.0.0.0.

• Apply—modifies attributes and saves the changes.

System > SNTP > Multicast

• Send Request In—the SNTP send request status in Multicast mode. The default option is Disabled. The list contains:
  • Enabled—sends the SNTP request to the broadcast server to calculate the delay time.
  • Disabled—does not send the SNTP request.
• Poll timeout—enter the number of seconds to wait for a response from a SNTP server before considering the attempt to have timed out. This value ranges from 1 to 30 seconds. The default value is 5 seconds.
• Delay Time—enter the delay time when there is no response from the multicast server. This value ranges from 1000 to 15000 microseconds. The default value is 8000 microseconds.
• Group Address Type—select the multicast group address type that can be configured by the administrator. IPv4 sets the multicast group address type as Internet Protocol Version 4.
• Group Address—enter the multicast group address that can be configured by the administrator.
• Primary Server Addressing Mode—select the address type of the primary server learnt in Multicast addressing mode. The list contains.
• Primary Server Address—displays the primary server IP address learnt in Multicast addressing mode. This is a read-only field. The default address is 0.0.0.0.

• Apply—modifies attributes and saves the changes.

System > SNTP > Manycast

• Poll Interval—enter the time period in seconds between successive SNTP request transmissions. This value ranges from 16 to 16284. The default value is 64.
• Poll timeout—enter the number of seconds to wait for a response from a SNTP server before considering the attempt to have timed out. This value ranges from 1 to 30 seconds. The default value is 5 seconds.
• Poll Retry—enter the time period in times to retry a request to a SNTP server that has not successfully responded. This value ranges from 0 to 10 with a default of 3.
• Server Type—select the type of servers used in Manycast addressing mode, that is to find a Manycast server the client can send the request to either broadcast or multicast address. The default option is Broadcast. The list contains:
  • Broadcast—configures SNTP broadcast server address in Manycast mode.
  • Multicast—configures SNTP multicast server address in Manycast mode.
• Group Address Type—select the Manycast group address type to be configured. IPv4—sets the Manycast group address type as Internet Protocol Version 4.
• Group Address—enter the Manycast group address to be configured.

• Primary Server Address Type—select the address type of the primary server learnt in Manycast addressing mode. IPv4 sets primary server address type as Internet Protocol Version 4.
• Primary Server Address—displays the primary server IP address learnt in Manycast addressing mode. This is a read-only field. The default address is 0.0.0.0.

• Apply—modifies attributes and saves the changes.