Cisco Cisco Packet Data Interworking Function (PDIF) Guía De Instalación
Initial System Configuration
▀ Set System Timing
▄ ASR 5500 Installation Guide
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Set System Timing
Setting the System Clock and Time Zone
Use the following command sequence to configure the system clock and time zone:
[local]host_name# clock set YYYY:MM:DD:HH:mm or YYYY:MM:DD:HH:mm:ss
[local]host_name# config
[local]host_name(config)# clock timezone timezone [ local ]
[local]host_name(config)# end
[local]host_name#
[local]host_name# config
[local]host_name(config)# clock timezone timezone [ local ]
[local]host_name(config)# end
[local]host_name#
Important:
See the online help for the clock timezone command for a complete list of supported time zones. The
optional local keyword indicates that the time zone specified is the local timezone.
Important:
Daylight Savings Time is automatically adjusted for time zones supporting it.
Enter show clock to verify that you configured the time and time zone correctly:
[local]host_name# show clock
Wednesday October 10 13:08:27 us-eastern 2012
Wednesday October 10 13:08:27 us-eastern 2012
Configuring Network Time Protocol Support
This section describes how to enable the use of the Network Time Protocol (NTP) on the ASR 5500 chassis.
Overview of NTP Support
Many of the services offered by the ASR 5500 platform require accurate timekeeping derived through NTP. If the time
reference(s) used by StarOS are not accurate, the services may be unreliable. For this reason it should be assumed that
normal system operation requires that NTP be configured.
reference(s) used by StarOS are not accurate, the services may be unreliable. For this reason it should be assumed that
normal system operation requires that NTP be configured.
The system uses NTP to synchronize internal clocks on the chassis to external time sources (typically GPS NTP sources,
or other Stratum 2 or 3 servers, switches or routers).
or other Stratum 2 or 3 servers, switches or routers).
By default, NTP is not enabled externally and should be configured when the system is initially installed. When
enabled, the active MIO/UMIO will synchronize with external sources. If not enabled, the active MIO/UMIO will use
its local clock as a time source. In the event of an NTP server or network outage, an already running MIO/UMIO will
continue to use NTP to maintain time accuracy, but in a holdover mode.
enabled, the active MIO/UMIO will synchronize with external sources. If not enabled, the active MIO/UMIO will use
its local clock as a time source. In the event of an NTP server or network outage, an already running MIO/UMIO will
continue to use NTP to maintain time accuracy, but in a holdover mode.
All cards with CPUs synchronize to the active MIO/UMIO internally. This occurs even if an external NTP server is not
configured. In the event of a MIO/UMIO switchover, all other cards will start synchronizing with the newly active
MIO/UMIO automatically.
configured. In the event of a MIO/UMIO switchover, all other cards will start synchronizing with the newly active
MIO/UMIO automatically.
The system should have: