Cisco ASR 9000 Series User Configuration Manual page 214

Configuring Frequency Synchronization on an Interface
DETAILED STEPS
Command or Action
Step 1
configure
Step 2 interface type interface-path-id
Example:
RP/0/RSP0/CPU0:router(config)# interface
GigabitEthernet0/1/1/0
Step 3
frequency synchronization
Example:
RP/0/RSP0/CPU0:router(config-if)# frequency
synchronization
Step 4 selection input
Example:
RP/0/RSP0/CPU0:router(config-if-freqsync)#
selection input
Step 5
priority priority-value
Example:
RP/0/RSP0/CPU0:router(config-if-freqsync)#
priority 100
Step 6 wait-to-restore minutes
Example:
RP/0/RSP0/CPU0:router(config-if-freqsync)#
wait-to-restore 300
Step 7
ssm disable
Example:
RP/0/RSP0/CPU0:router(config-if-freqsync)#
ssm disable
Step 8
time-of-day-priority priority
Example:
RP/0/RSP0/CPU0:router(config-if-freqsync)#
time-of-day-priority 50
Step 9 quality transmit {exact | highest | lowest} itu-t
option ql-option
Cisco ASR 9000 Series Aggregation Services Router System Management Configuration Guide, Release 5.1.x
196
Purpose
Enters interface configuration mode.
Enables frequency synchronization on the interface and enters interface
frequency synchronization mode to configure the various options. By
default, this causes the system selected frequency signal to be used for
clocking transmission, but does not enable the use of the interface as
an input.
(Optional) Specifies the interface as a timing source to be passed to
the selection algorithm.
(Optional) Configures the priority of the frequency source on a
controller or an interface. Values can range from 1 (highest priority)
to 254 (lowest priority). The default value is 100.
This command is used to set the priority for an interface or clock
interface. The priority is used in the clock-selection algorithm to choose
between two sources that have the same quality level (QL). Lower
priority values are preferred.
(Optional) Configures the wait-to-restore time, in minutes, for
frequency synchronization on an interface. This is the amount of time
after the interface comes up before it is used for synchronization.
Values can range from 0 to 12. The default value is 5.
(Optional) Disables Synchronization Status Messages (SSMs) on the
interface.
• For SyncE interfaces, this disables sending ESMC packets, and
ignores any received ESMC packets.
• For SONET and clock interfaces, this causes DNUs to be sent,
and ignores any received QL value.
(Optional) Specifies the priority of this time source as the time-of-day
(ToD) source. The priority is used as the first criterion when selecting
between sources for a time-of-day selection point. Values can range
from 1 (highest priority) to 254 (lowest priority); the default value is
100.
(Optional) Adjusts the QL that is transmitted in SSMs.
Configuring Frequency Synchronization