Related Documentation
synchronization (M Series, T Series, and PTX Series)
Syntax
Hierarchy Level
Release Information
Statement introduced in Junos OS Release 7.6.
Statement introduced in Junos OS Release 9.3 for M120 routers.
Statement introduced in Junos OS Release 10.2 for T320, T640, and T1600 routers.
Statement introduced in Junos OS Release 12.1X48 for PTX Series Packet Transport Switches.
Description
(M320, M40e, M120, T320, T640, and T1600 routers and PTX Series Packet Transport Switches only) Configure an external synchronization interface to synchronize the internal Stratum 3 clock to an external source, and then synchronize the chassis interface clock to that source.
Options
primary—First external timing source specified in the configuration hierarchy. This statement has the following suboptions:
- external-a—Use external-a as the primary clock synchronization source.
- external-b—Use external-b as the primary clock synchronization source.
- fpc-slot-number—Use fpc-slot-number as the primary clock synchronization source. For the PTX5000 Packet Transport Switch, replace slot-number with a value from 0 through 7.
- gps-0-10mhz—Use gps-0-10mhz as the primary clock synchronization source.
- gps-0-5mhz—Use gps-0-5mhz as the primary clock synchronization source.
- gps-1-10mhz—Use gps-1-10mhz as the primary clock synchronization source.
- gps-1-5mhz—Use gps-1-5mhz as the primary clock synchronization source.
- bits-a—Use bits-a as the primary clock synchronization source.
- bits-b—Use bits-b as the primary clock synchronization source.
secondary—Second external timing source specified in the configuration hierarchy.
- external-a—Use external-a as the secondary clock synchronization source.
- external-b—Use external-b as the secondary clock synchronization source.
- fpc-slot-number—Use fpc-slot-number as the secondary clock synchronization source. For the PTX5000 Packet Transport Switch, replace slot-number with a value from 0 to 7.
- gps-0-10mhz—Usegps-0-10mhz as the secondary clock synchronization source.
- gps-0-5mhz—Use gps-0-5mhz as the secondary clock synchronization source.
- gps-1-10mhz—Use gps-1-10mhz as the secondary clock synchronization source.
- gps-1-5mhz—Use gps-1-5mhz as the secondary clock synchronization source.
- bits-a—Use bits-a as the secondary clock synchronization source.
- bits-b—Use bits-b as the secondary clock synchronization source.
signal-type—Specify the line encoding mode for interfaces: either t1 or e1. For the M40e router, only the t1 signal-type mode is supported.
Default: t1
switching-mode—Specify revertive if a lower-priority synchronization can be switched to a valid, higher-priority synchronization.
Default: non-revertive
transmitter-enable—(M320 routers only) Control whether the diagnostic timing signal is transmitted.
validation-interval—Validate the synchronized deviation. If revertive switching is enabled and a higher-priority clock is validated, the clock module is directed to the higher-priority clock, and all configured and active synchronizations are validated. The validation timer resumes after the current validation interval expires. This feature is not supported on PTX Series Packet Transport Switches.
Range: (M320, M40e, T320, T640, T1600 routers) 90 through 86,400 seconds.
(M120 routers) 30 through 86,400 seconds.
Default: (M320, M40e, T320, T640, T1600 routers) 90 seconds. (M120 routers) 30 seconds
y-cable-line-termination—(M320 routers only) Specify that a single signal be wired to both Control Boards (CBs) using a Y-cable.
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
