source interfaces
Syntax
source interfaces (external | interface-name)
hold-off-time time;
priority number;
quality-level (prc | prs | sec | smc | ssu-a | ssu-b | st2 | st3 | st3e | st4 | stu | tnc);
request (force-switch | lockout);
wait-to-restore minutes;
aggregated-ether aggregated–ether-group-name;
}
Hierarchy Level
[edit chassis synchronization]
Description
Configure the clock source that is used by the clock selection process on an interface.
(SCB only) Specify the timeTransmitter clock source as the external-a interface and the secondary clock source as the external-b interface. The clock source is chosen using the clock selection process.
(SCBE only) Specify the external interface to select the external clock source.
(SCBE2 only) Specify the external-0/0 interface or the external-1/0 interface to select the external clock source.
Options
| time |
Amount of time in milliseconds that a signal is held before being passed to the clock selection process. Range: 300–1800 milliseconds Default: 1000 milliseconds |
number |
Set the priority level of the clock source. Range: 1 through 5 |
prc—Primary reference clock
prs —Primary reference source—Stratum 1
sec—SDH equipment clock
smc—SONET minimum clock
ssu-a—Synchronization supply unit A
ssu-b—Synchronization supply unit B
st2—Stratum 2
st3—Stratum 3
st3e—Stratum 3E
st4—Stratum 4
force-switch |
Force switching to a clock source, provided the clock source is enabled and not locked out. Only one configured source may be force-switched. |
lockout |
Clock source is not considered by the selection process. Lockout may be configured for any source. |
| minutes |
Set the time for the port signal to be up before the port is opened to receive and transmit ESMC messages. Range: 0 through 12 minutes Default: 5 minutes |
| aggregated–ether-group-name |
aggregated ethernet group name |
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 11.2R4.