Page 214 7450 ESS OS Basic System Configuration Guide
System Time
7450 ESS-Series routers are equipped with a real-time system clock for time keeping purposes.
When set, the system clock always operates on Coordinated Universal Time (UTC), but the 7450
ESS OS software has options for local time translation as well as system clock synchronization.
System time parameters include:
• Time Zones on page 214
• Network Time Protocol (NTP) on page 216
• SNTP Time Synchronization on page 217
• CRON on page 217
Time Zones
Setting a time zone in SR OS allows for times to be displayed in the local time rather than in UTC.
The SR OS has both user-defined and system defined time zones.
A user-defined time zone has a user assigned name of up to four printable ASCII characters in
length and unique from the system-defined time zones. For user-defined time zones, the offset
from UTC is configured as well as any summer time adjustment for the time zone.
The SR OS system-defined time zones are listed in Table 21 which includes both time zones with
and without summer time correction.
Table 21: System-defined Time Zones
Acronym Time Zone Name UTC Offset
Europe:
GMT Greenwich Mean Time UTC
BST British Summer Time UTC +1
IST Irish Summer Time UTC +1*
WET Western Europe Time UTC
WEST Western Europe Summer Time UTC +1
CET Central Europe Time UTC +1
CEST Central Europe Summer Time UTC +2
EET Eastern Europe Time UTC +2
EEST Eastern Europe Summer Time UTC +3
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