System Management
7450 ESS OS Basic System Configuration Guide Page 297
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 295
• Configuring Timing References on page 296
• Using the Revert Command on page 297
• Other Editing Commands on page 298
• Forcing a Specific Reference on page 299
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