Technical data

Configuring and Managing NTP
12.6 NTP Event Logging
Table 12–1 describes the messages most frequently included in the NTP log file.
Table 12–1 NTP Log File Messages
Message Description
Synchronized to IP-address Announces that a peer candidate has passed validity
and accuracy tests (as performed by the clock
selection algorithms) and has been selected as the new
synchronization source. For example:
synchronized to 16.20.208.100, stratum=2
Time reset time Indicates that NTP has set the local clock by slewing
the local time to match the synchronization source. This
happens because the local host is no longer synchronized.
For example:
time reset (slew) -0.218843 sec
Synchronization lost This usually occurs after a time reset. All peer filter
registers are cleared, for example, for that particular peer;
all state variables are reset along with the polling interval;
and the clock selection procedure is once again performed.
Previous time adjustment incomplete Indicates that the last clock adjustment did not finish in one
attempt. The residual is added to the next adjustment.
Couldn’t resolve hostname, giving up on it Indicates that the host name could not be resolved. This
peer will not be considered for the candidate list of peers.
For example:
couldn’t resolve ’fred’, giving up on it
Send to IP-address: reason Indicates that a problem occurred while sending a packet
to its destination. The most common reason logged is
‘‘connection refused.’’ For example:
sendto(16.20.208.100): connection refused
Connection reestablished to IP-address Indicates that errors occurred when sending packets, but
now packets are being sent successfully. For example:
connection reestablished to 16.20.208.100
Time error delta-time is way too large (set
clock manually)
NTP has detected a time difference greater than 1000
seconds between the local clock and the server clock. You
must set the clock manually or use the NTPDATE program
and then restart NTP. Once NTP sets the clock, it will
continuously track the discrepancy between the local time
and NTP time and adjust the clock accordingly.
offset : n sec freq: x poll: y sec An hourly message, where:
•
offset is the offset (in seconds) of the peer clock
relative to the local clock (that is, the amount to adjust
the local clock to bring it into correspondence with the
reference clock).
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Configuring and Managing NTP 12–11