System Management 
302
Basic System Configuration Guide
3HE 11010 AAAC TQZZA Edition: 01
 
This section describes the commands used to configure and control the timing 
subsystem.
• Entering Edit Mode
• Configuring Timing References
• Configuring IEEE 1588v2 PTP
• Configuring QL Values for SSM
• Using the Revert Command
• Other Editing Commands
• Forcing a Specific Reference
CLI Syntax: config>system>sync-if-timing 
abort
begin
commit
external
input-interface 
impedance {high-impedance | 50-ohm | 
75-ohm}
type {2048khz-G703 | 5mhz | 10mhz}
output-interface
type {2048khz-G703 | 5mhz | 10mhz}
ref-order first second [third]
ref1
source-port port-id [adaptive]
no shutdown
ref2
source-port port-id [adaptive]
no shutdown
revert
6.10.6.1 Entering Edit Mode
To enter the mode to edit timing references, you must enter the begin keyword at the 
config>system>sync-if-timing# prompt. 
Use the following CLI syntax to enter the edit mode:
CLI Syntax: config>system>sync-if-timing
begin
The following error message displays when you try to modify sync-if-timing 
parameters without entering begin first.