Owner's Manual

92 | Chapter 3. Managing the Switch
NETGEAR 8800 User Manual
configure sntp-client primary fd98:d3e2:f0fe:0:54ae:34ff:fecc:892
configure sntp-client primary ntpserver.mydomain.com
NTP queries are first sent to the primary server. If the primary server does not respond
within 1 second, or if it is not synchronized, the switch queries the secondary server (if
one is configured). If the switch cannot obtain the time, it restarts the query process.
Otherwise, the switch waits for the
sntp-client update interval before querying again.
5. Optionally, the interval for which the SNTP client updates the real-time clock of the switch
can be changed using the following command:
configure sntp-client update-interval <update-interval>
The default sntp-client update-interval value is 64 seconds.
6. You can verify the configuration using the following commands:
• show sntp-client
This command provides configuration and statistics associated with SNTP and its
connectivity to the NTP server.
• show switch {detail}
This command indicates the GMT offset, the Daylight Saving Time configuration and
status, and the current local time.
NTP updates are distributed using GMT time. To properly display the local time in logs and
other time-stamp information, the switch should be configured with the appropriate offset to
GMT based on geographical location.
Table 15 lists GMT offsets.
Table 15. Greenwich Mean Time Offsets
GMT
Offset in
Hours
GMT Offset
in Minutes
Common Time Zone References Cities
+0:00 +0 GMT - Greenwich Mean
UT or UTC - Universal (Coordinated)
WET - Western European
London, England; Dublin, Ireland;
Edinburgh, Scotland; Lisbon, Portugal;
Reykjavik, Iceland; Casablanca,
Morocco
-1:00 -60 WAT - West Africa Cape Verde Islands
-2:00 -120 AT - Azores Azores
-3:00 -180 Brasilia, Brazil; Buenos Aires,
Argentina; Georgetown, Guyana
-4:00 -240 AST - Atlantic Standard Caracas; La Paz
-5:00 -300 EST - Eastern Standard Bogota, Columbia; Lima, Peru; New
York, NY, Trevor City, MI USA
-6:00 -360 CST - Central Standard Mexico City, Mexico
-7:00 -420 MST - Mountain Standard Saskatchewan, Canada