CLI Reference Guide-R05

Chapter 4 | System Management Commands
Synchronous Ethernet
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◆ If revertive switching is enabled, the active clock source port will be changed
when a clock source port with a higher priority becomes available. If revertive
switching is disabled, the active clock source port will not be changed unless
the current active clock source becomes invalid.
◆ If SyncE has locked the clock source and the clock source becomes invalid,
SyncE will operate in holdover mode, switching over to the local reference clock
if all available clock source signals fail. If SyncE has never locked the clock
source and no valid clock source exists, SyncE will operate in free-run mode. If
SyncE locked the clock source, SyncE will operate in locked mode.
Example
Console(config)#synce auto-clock-source-selecting revertive-switching
Console(config)#end
Console#show synce
SyncE Status:
Port Status Clock Source
--------- -------- ------------
Eth 1/ 9 Enabled Yes
Eth 1/10 Disabled No
Eth 1/11 Disabled No
Eth 1/12 Disabled No
SyncE Clock Source Selection Mode: Auto
SyncE Active Clock Source Locked: No
SyncE Clock Source Status:
Port Priority Active Clock Source Clock Status
--------- -------- ------------------- ------------
Eth 1/12 25 Yes Bad
...
synce force-clock-
source-selecting
This command sets the local clock as the active clock source, or sets a port to be the
active clock source.
Syntax
synce force-clock-source-selecting [ethernet unit/port]
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-12)
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
◆ If this command is used without specifying a clock source port, and SyncE has
not been enabled on any port, then the local clock is set to be the active clock
source.