- play_arrow Precision Time Protocol
- play_arrow Precision Time Protocol Overview
- play_arrow Precision Time Protocol Clocks
- PTP Boundary Clock Overview
- Example: Configure PTP Boundary Clock
- Example: Configure PTP Boundary Clock With Unicast Negotiation
- Configure PTP TimeTransmitter Clock
- Configure PTP TimeReceiver Clock
- Example: Configure Ordinary TimeReceiver Clock With Unicast-Negotiation
- Example: Configure Ordinary TimeReceiver Clock Without Unicast-Negotiation
- PTP Transparent Clocks
- Configure PTP Transparent Clock
- play_arrow Precision Time Protocol Profiles
- play_arrow PHY Timestamping
- play_arrow Precision Time Protocol over Ethernet
- PTP over Ethernet Overview
- Guidelines to Configure PTP over Ethernet
- Configure PTP Dynamic Ports for Ethernet Encapsulation
- Configure PTP Multicast TimeTransmitter and TimeReceiver Ports for Ethernet Encapsulation
- Example: Configure PTP over Ethernet for Multicast TimeTransmitter, TimeReceiver, and Dynamic Ports
- play_arrow Precision Time Protocol Additional Features
- Precision Time Protocol (PTP) over Link Aggregation Group (LAG)
- Precision Time Protocol (PTP) Trace Overview
- Line Card Redundancy for PTP
- Timing Defects and Event Management on Routing Platforms
- SNMP MIB for Timing on Routing Platforms
- PTP Passive Port Performance Monitoring on PTX10004 and PTX10008 Devices
-
- play_arrow Global Navigation Satellite System (GNSS)
- play_arrow GPS Systems on Routing Platforms
- play_arrow Integrated GNSS on Routing Platforms
- play_arrow GNSS Configuration for Routers Using External GNSS Receiver
- play_arrow Assisted Partial Timing Support (APTS) on Routing Platforms
-
- play_arrow Network Time Protocol
- play_arrow NTP Concepts
- play_arrow NTP Configuration Examples
-
- play_arrow Synchronous Ethernet
- play_arrow Synchronous Ethernet Overview
- play_arrow Synchronous Ethernet on 10-Gigabit Ethernet MIC
-
- play_arrow Clock Synchronization
- play_arrow Clock Synchronization Concepts
- play_arrow Clock Synchronization for ACX Series Routers
- play_arrow Clock Synchronization for MX Series Routers
- play_arrow Clock Synchronization for PTX Series Routers
- play_arrow Centralized Clocking
-
- play_arrow Hybrid Mode
- play_arrow Hybrid Mode Overview
- play_arrow Hybrid Mode and ESMC Quality-Level Mapping
- Configure Hybrid Mode and ESMC Quality-Level Mapping Overview
- Configure Hybrid Mode with Mapping of the PTP Clock Class to the ESMC Quality-Level
- Configure Hybrid Mode with a User-Defined Mapping of the PTP Clock Class to the ESMC Quality-Level
- Example: Configure Hybrid Mode and ESMC Quality-Level Mapping on ACX Series Router
- Example: Configure Hybrid Mode and ESMC Quality-Level Mapping on MX240 Router
-
- play_arrow Configuration Statements and Operational Commands
- play_arrow Appendix
Modify Default Time Zone
The default local time zone on a router or a switching device is UTC (Coordinated Universal Time, formerly known as Greenwich Mean Time, or GMT).
To modify the local time zone, include the time-zone statement at the
[edit system] hierarchy level:
[edit system] time-zone (GMThour-offset | time-zone);
You can use the GMT hour-offset option to set the time
zone relative to UTC (GMT) time. By default, hour-offset
is 0. You can configure this to be a value in the range from –14 to +12.
You can also specify time-zone as a string such as PDT
(Pacific Daylight Time) or WET (Western European Time), or specify the continent and major
city.
Junos OS complies with the POSIX time-zone standard, which is counter-intuitive to the
way time zones are generally indicated relative to UTC. A time zone ahead of UTC (east of
the Greenwich meridian) is commonly indicated as GMT +n; for example,
the Central European Time (CET) zone is indicated as GMT +1. However, this is not true for
POSIX time zone designations. POSIX indicates CET as GMT-1. If you include the set
system time-zone GMT+1 statement for a router or a switch in the CET zone, your
device time will be set to one hour behind GMT, or two hours behind the actual CET time.
For this reason, you might find it easier to use the POSIX time-zone strings, which you
can list by entering set system time-zone ?.
For the time zone change to take effect for all processes running on the router or switch, you must reboot the router or switch.
The following example shows how to change the current time zone to
America/New_York:
[edit]
user@host# set system time-zone America/New_York
[edit]
user@host# show
system {
time-zone America/New_York;
}
Starting in Junos OS Release 15.1F6, for the routers with
the RE-MX-X6, RE-MX-X8, and RE-PTX-X8 Routing Engines, the date and time zones are
synchronized from the admin guest Junos OS to the host OS. Thus, the guest OS and the host
OS use the same time zone and there is no difference in the timestamps in system log files
of Junos OS and the host OS. This time zone and date synchronization changes the time zone
of the host from the default UTC to the configured time zone. However, for the time zone
change to take effect for all processes running on the router, reboot the router by using
the request vmhost reboot command.
