Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SYSTEM BASICS CONFIGURATION GUIDE 2010-10-04 Configuration Manual page 272

JunosE 11.3.x System Basics Configuration Guide
timing select
timing source
242
Use to disable the auto-upgrade feature of the system's timing selector.
The system starts out by setting the operational timing selector to the administratively
configured selector. See the timing select command.
Example
host1(config)#timing disable-auto-upgrade
Use the no version to restore the factory default, which is auto-upgrade enabled.
See timing disable-auto-upgrade.
Use to specify which of the configured timing sources is used by default.
Primary timing source is preferred over secondary, and secondary is preferred over
tertiary. See the timing source command.
If you enable the auto-upgrade feature, the system does not try to upgrade beyond
the administratively configured selector.
Example
host1(config)#timing select secondary
There is no no version.
See timing select.
Use to specify how the SRP module exchanges timing signals with an interface.
You can specify primary, secondary, and tertiary timing sources.
You can specify one external source received on an I/O module or IOA other than the
SRP I/O module or SRP IOA.
You can specify two or more internal sources or external sources received through the
SRP I/O module or SRP IOA external timing ports.
On the E120 and E320 routers, you can specify sonet for only two of the available three
timing sources (primary, secondary, or tertiary).
The available sources to choose are:
ds1—DS1 interface
ds3—DS3 interface
e1—E1 interface
e3—E3 interface
sonet—SONET interface
internal—Internal system controller (SC) oscillator
line—External timing input on SRP module
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