Edge-Core ECS4660-28F, Руководство по управлению, Страница: 979 / 2020

C
HAPTER
24
| System Management Commands
Synchronous Ethernet
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This example shows PTP configuration settings, negotiated settings, and
default values for a transparent clock.
Console#show ptp information transparent
Transparent Default Data Set:
Clock Identify : 0x00000CFFFE00FDFD
Number Ports : 40
Delay Mechanism : End to End
Primary Domain Number : 0
Console#
S
YNCHRONOUS
E
THERNET
Synchronous Ethernet (SyncE) is used to synchronize specified links to the
same frequency in order to transfer timing information to remote sites.
SyncE ensures that all nodes have a clock source traceable to a Primary
Reference Clock (PRC). The commands described in this section are used to
enable SyncE on specified interfaces, automatically or manually select a
clock source, receive Synchronization Status Messages (SSM) used to
select the clock source based on the indicated quality level.
Table 84: show ptp information - display description for transparent clock
Field Description
Clock Identity A unique 8-octet array based on the IEEE EUI-64
assigned numbers
Number Ports Number of ports on this device
Delay Mechanism Time delay measurement method (end-to-end or peer-
to-peer)
Primary Domain Number The primary PTP domain to which this device belongs.
(This switch can only belong to one domain.)
Table 85: Sync-E Commands
Command Function Mode
synce Enables SyncE on all ports that support SyncE GC
synce ethernet Enables SyncE on a port that supports SyncE GC
synce ethernet clock-
source
Manually sets a port as a clock source or candidate
clock source at the specified priority
GC
synce auto-clock-source-
selecting
Automatically selects the clock-source port with the
highest priority
GC
synce force-clock-source-
selecting
Sets the local clock as the active clock source, or sets
a port to be the active clock source
GC
synce ssm ethernet Configures a port to receive/send SSM messages, and
sets the priority used for this port in clock source port
selection
GC
synce clk-src-ssm Uses SSM to select the clock source according to the
SSM quality level, priority and port number
GC
show synce Shows SyncE status, selection mode, clock source
status, and SSM status
PE