Monitoring NTP from the ACLI

NTP server information that you can view with the show ntp server command tell you about the quality of the time being used in terms of offset and delays measurements. You can also see the maximum error bounds.

When you use this command, information for all configured servers is displayed. Data appears in columns that are defined in the table below:

Display Column	Definition
server	Lists the NTP servers configured on the Oracle® Enterprise Session Border Controller by IP address. Entries are accompanied by characters: Plus sign (+)—Symmetric active server Dash (-)—Symmetric passive server Equal sign (=)—Remote server being polled in client mode Caret (^)—Server is broadcasting to this address Tilde (~)—Remote peer is sending broadcast to * Asterisk (*)—The peer to which the server is synchronizing
st	Stratum level—Calculated from the number of computers in the NTP hierarchy to the time reference. The time reference has a fixed value of 0, and all subsequent computers in the hierarchy are n+1.
poll	Maximum interval between successive polling messages sent to the remote host, measured in seconds.
reach	Measurement of successful queries to this server; the value is an 8-bit shift register. A new server starts at 0, and its reach augments for every successful query by shifting one in from the right: 0, 1, 3, 7, 17, 37, 77, 177, 377. A value of 377 means that there have been eight successful queries.
delay	Amount of time a reply packet takes to return to the server (in milliseconds) in response.
offset	Time difference (in milliseconds) between the client’s clock and the server’s.
disp	Difference between two offset samples; error-bound estimate for measuring service quality.