CLI Reference Guide-R05

Chapter 4 | System Management Commands
Synchronous Ethernet
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processing delays. However, both SyncE and PTP may be used in combination
to achieve a high level of frequency synchronization with a common defined
time.
◆ SyncE delivers a high level of frequency accuracy, but cannot deliver time-of-
day information (i.e., GMT). Conversely, PTP supports time-of-day information
required by billing and service level agreements.
◆ SyncE implementation guidelines are covered by these standards:
Example
Console(config)#synce
Console(config)#exit
Console#show synce
SyncE Status:
Port Status Clock Source
--------- -------- ------------
Eth 1/ 9 Enabled No
Eth 1/10 Enabled No
Eth 1/11 Enabled No
Eth 1/12 Enabled No
...
synce ethernet This command enables SyncE on a port that supports SyncE. Use the no form to
disable SyncE on a port.
Syntax
[no] synce ethernet unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-12)
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
◆ This command only enables SyncE on the specified port. It does not configure
the port to be the clock source.
Table 26: Synchronous Ethernet Standards
Standard Description
ITU G.8264/Y.1364 Distribution of timing information through packet networks
ITU G.8261/Y.1361 Timing and synchronization aspects in packet networks
ITU G.8262/Y.1362 Timing characteristics of a synchronous Ethernet equipment slave clock