Alcatel-Lucent 7450 ESS-12 Configuration Manual page 518

Debug Commands
sync-if-timing
Syntax sync-if-timing
Context debug
Description
The context to debug synchronous interface timing references.
force-reference
Syntax force-reference {ref1 | ref2 | bits | ptp}
no force-reference
Context debug>sync-if-timing
Description This command allows an operator to force the system synchronous timing output to use a specific reference.
Note: The debug sync-if-timing force-reference command should only be used to test and debug problems.
Network synchronization problems may appear if network elements are left with this manual override set-
ting. Once the system timing reference input has been forced, it may be cleared using the no force-reference
command.
The CPM clock can be forced to use a specific input reference using the force-reference command.
When the command is executed, the CPM clock on the active CPM immediately switches its input reference
to that specified by the command. If the specified input is not available (shutdown), or in a disqualified
state, the CPM clock shall use the next qualified input reference based on the selection rules.
This command also affects the BITS output port on the active CPM. If the BITS output port selection is set
to line-reference and the reference being forced is not the BITS input port, then the system uses the forced
reference to generate the signal out the BITS output port. If the BITS output port selection is set to internal-
clock, then the system uses the output of the CPM clock to generate the signal for the BITS output port.
On a CPM activity switch, the force command is cleared and normal reference selection is determined.
Debug configurations are not saved between reboots.
Note: The 7750 SR-c4 has two BITS input ports on the CFM. The force reference command on this system
allows the selection of the specific port.
7750 SR-c4 CLI Syntax: debug>sync-if-timing>force-reference {ref1 | ref2 | bits1 | bits2}
Parameters ref1 — The clock will use the first timing reference.
ref2 — The clock will use the second timing reference.
bits — The clock will use the external network interface on the active
bits1 — (7750 SR-c4) The clock will use the bits1 timing reference.
bits2 — (7750 SR-c4) The clock will use the bits2 timing reference.
Page 480 7450 ESS OS Basic System Configuration Guide
CPM
to be the highest priority input.