Edge-Core ECS4660-28F, Руководство по управлению, Страница: 983 / 2020

C
HAPTER
24
| System Management Commands
Synchronous Ethernet
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E
XAMPLE
Console(config)#synce ethernet 1/25 clock-source priority 1
Console(config)#
synce auto-clock-
source-selecting
This command automatically selects the clock source port with the highest
priority. Use the no form to disable automatic clock source selection.
S
YNTAX
[ no ] synce auto-clock-source-selecting [ revertive-switching ]
auto-clock-source-selecting - Chooses the clock source port
based on current clock-source port status and priority.
revertive-switching - The active clock source port will be changed
when a clock source port with a higher priority becomes available.
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Global Configuration
C
OMMAND
U
SAGE
◆
The switch can only be set to automatic clock source selection mode
when the current selection mode is set to manual.
◆
At least one clock source port must be configured before switching to
auto clock source selection mode. All ports configured as clock source
port in manual mode will be kept after changing to auto mode.
◆
If more than one port is configured as clock source port, the port with a
valid clock source signal and the highest priority is selected to be the
active clock source port.
◆
If the configured priorities for two or more clock source ports are the
same, it will choose the smaller numbered port to be the active clock
source port.
◆
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.