Using The Revert Command - Alcatel-Lucent 7950 XRS Series Configuration Manual

Using the Revert Command

Using the Revert Command
The revert command allows the clock to revert to a higher priority reference if the current
reference goes offline or becomes unstable. When the failed reference becomes operational, it is
eligible for selection.
When mode is non-revertive, a failed clock source is not selected again. If a node would enter
holdover due to the references being in previous failed state, then the node will select one of the
previously failed references rather than going into holdover.
CLI Syntax: config>system>sync-if-timing
If the current reference goes offline or becomes unstable the revert command allows the clock to
revert to a higher-priority reference.
When revert is switching enabled a valid timing reference of the highest priority is used. If a
reference with a higher priority becomes valid, a reference switch over to that reference is
initiated. If a failure on the current reference occurs, the next highest reference takes over.
If non-revertive switching is enabled, the valid active reference always remains selected even if a
higher priority reference becomes available. If the active reference becomes invalid, a reference
switch over to a valid reference with the highest priority is initiated. The failed reference is eligible
for selection once it becomes operational.
CLI Syntax: config>system>sync-if-timing
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revert
no revert
7950 SR OS Basic System Configuration Guide