Enables the use of the Network Time Protocol (NTP) for synchronizing the system clock. By default, NTP is not enabled externally and should be configured when the system is initially installed. When enabled, the active ASR 5000 SMC or ASR 5500 MIO will synchronize with external sources. If not enabled, the active SMC or MIO will use its local clock as a time source. In the event of an NTP server or network outage, an already running SMC or MIO will continue to use NTP to maintain time accuracy, but in a holdover mode.
Security Administrator, Administrator
Exec > Global Configuration > NTP Configuration
configure > ntp
Entering the above command sequence results in the following prompt:
enable [ context ]
Specifies the context for which NTP is to be enabled as an alphanumeric string of 1 through 79 characters.
NTP must be configured for use in the local context only. Use of other contexts will cause issues.
Sets the NTP server to be used for the system. Only one NTP server may be active at any given time.
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).
All cards with CPUs synchronize to the active SMC or MIO internally. This occurs even if an external NTP server is not configured. In the event of a SMC or MIO switchover, all other cards will start synchronizing with the newly active SMC or MIO automatically.
If any NTP server is enabled, the chassis system clock will be synchronized to the active NTP server which covers all contexts for timing synchronization.
Refer to the System Administration Guide for additional information on configuring NTP.
The following command enables use of NTP for the local context.