Alcatel-Lucent 7950 XRS Series, Configuration Manual

Page: 307 / 502

System Management
7950 SR OS Basic System Configuration Guide Page 307
System Timing
When synchronous Ethernet is enabled, the operator can select an Ethernet port as a candidate for
timing reference. The timing information recovered from this port is used by the central clock.
Note: In the current release the derived timing is distributed only through other Ethernet ports.
CLI Syntax:
config>system>sync-if-timing
abort
begin
commit
ref-order ref1 ref2
ref1
source-port port-id
no shutdown
ref2
source-port port-id
no shutdown
no revert
In the event that network timing is required for the synchronous interfaces in the router, a timing
subsystem is utilized to provide a clock to all synchronous interfaces within the system.
This section describes the commands used to configure and control the timing subsystem.
Use the CLI syntax displayed below to:
• Edit Mode on page 308
• Configuring Timing References on page 309
• Using the Revert Command on page 310
• Other Editing Commands on page 311
• Forcing a Specific Reference on page 312