Juniper EX9253 Hardware Manual page 106

the ESMC or SSM quality level that is configured for a qualifying interface or the received-quality
option to use the ESMC or SSM quality that is received on the qualifying interface.
[edit chassis synchronization]
user@host# set selection-mode (configured-quality | received-quality)
8. Configure the switchover mode as revertive or non-revertive. The revertive option enables the
device to automatically switch from a lower to a higher quality clock source whenever the higher
clock source becomes available. On the other hand, the non-revertive option enables the device to
continue using the current clock source as long as it is valid.
[edit chassis synchronization]
user@host# set switchover-mode (non-revertive | revertive)
9. Configure the options for the ESMC source related external clock source interface.
a. Go to the [edit chassis synchronization source interfaces external] hierarchy level or the [edit chassis
synchronization source interfaces
[edit chassis synchronization]
user@host# edit source interfaces external
OR
[edit chassis synchronization]
user@host# edit source interfaces
b. Configure the external clock interface and the Ethernet interface with their options. Configure
the priority statement from 1 through 5; the quality-level statement as prc, prs, sec, ssu-a, ssu-b,
st2, st3e, stu, or tnc; the request statement as force-switch or lockout; the wait-to-restore
statement from 0 minutes to 12 minutes; and the hold-off-time statement from 300 through
1800 milliseconds. You can configure the same options for the Ethernet interfaces as well.
[edit chassis synchronization source interfaces (external
interface-name )]
user@host# set priority
user@host# set quality-level (prc | prs |
stu | tnc)
user@host# set request (force-switch | lockout)
ethernet-interface-name ] hierarchy level.
ethernet-interface-name
value
ethernet-
|
sec | ssu-a | ssu-b | st2 | st3e |
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