synchronization (M Series and T Series)
Syntax
synchronization {
primary (external-a | external-b | fpc-slot-number | gps-0-10mhz | gps-0-5mhz | gps-1-10mhz | gps-1-5mhz | bits-a | bits-b);
secondary (external-a | external-b | fpc-slot-number | gps-0-10mhz | gps-0-5mhz | gps-1-10mhz | gps-1-5mhz | bits-a | bits-b );
signal-type (t1 | e1);
switching-mode (revertive | non-revertive);
transmitter-enable;
validation-interval seconds;
y-cable-line-termination;
}
Hierarchy Level
[edit chassis]
Description
(M320, M40e, M120, T320, T640, and T1600 routers and PTX Series Packet Transport Routers 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—Useexternal-aas the timeTransmitter clock synchronization source.external-b—Useexternal-bas the timeTransmitter clock synchronization source.fpc-slot-number—Usefpc-slot-numberas the timeTransmitter clock synchronization source. For the PTX5000 Packet Transport Router, replace slot-number with a value from0through7.gps-0-10mhz—Usegps-0-10mhzas the timeTransmitter clock synchronization source.gps-0-5mhz—Usegps-0-5mhzas the timeTransmitter clock synchronization source.gps-1-10mhz—Usegps-1-10mhzas the timeTransmitter clock synchronization source.gps-1-5mhz—Usegps-1-5mhzas the timeTransmitter clock synchronization source.bits-a—Usebits-aas the timeTransmitter clock synchronization source.bits-b—Usebits-bas the timeTransmitter clock synchronization source.
secondary—Second external timing source specified
in the configuration hierarchy.
external-a—Useexternal-aas the secondary clock synchronization source.external-b—Useexternal-bas the secondary clock synchronization source.fpc-slot-number—Usefpc-slot-numberas the secondary clock synchronization source. For the PTX5000 Packet Transport Router, replace slot-number with a value from0to7.gps-0-10mhz—Usegps-0-10mhzas the secondary clock synchronization source.gps-0-5mhz—Usegps-0-5mhzas the secondary clock synchronization source.gps-1-10mhz—Usegps-1-10mhzas the secondary clock synchronization source.gps-1-5mhz—Usegps-1-5mhzas the secondary clock synchronization source.bits-a—Usebits-aas the secondary clock synchronization source.bits-b—Usebits-bas 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
Routers.
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.
Release Information
Statement introduced in Junos OS Release 7.6.