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Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
OL-16506-10
Chapter 10 Synchronous Ethernet Support
Configuring Synchronous Ethernet
The following example shows how to configure the network-clock source quality-level in the
interface configuration mode:
Router(config-if)# network-clock source quality-level QL-PRC rx
• Wait-to-Restore Timer: Use the network-clock wait-to-restore timer global command to set the
wait-to-restore time. You can configure the wait-to-restore time to any value between 0 to 86400
seconds. The default value is 300 seconds. The wait-to-restore timer can be set in the global
configuration mode and the interface configuration mode. The following example shows how to
configure the wait-to-restore timer in the global configuration mode:
Router(config)# network-clock wait-to-restore 10 global
The following example shows how to configure the wait-to-restore timer in the interface
configuration mode:
Router(config)# int gigabit 0/0/0
Router(config-if)# network-clock wait-to-restore 10
• Hold-Off Time: Use the network-clock hold-off timer global command to configure hold-off time.
You can configure the hold-off time to either 0 or any value between 50 to 10000 ms. The default
value is 300 ms. The network-clock hold-off timer can be set in the global configuration mode and
the interface configuration mode. The following example shows how to configure the hold-off timer:
Router(config-if)# network-clock hold-off 50 global
• Force Switch: Use the network-clock switch force command to forcefully select a synchronization
source irrespective of whether the source is available, and within range. The following example
shows how to configure a force switch:
Router# network-clock switch force interface GigabitEthernet 0/0/0
• Manual Switch: Use the network-clock switch manual command to manually select a
synchronization source, provided the clock source has a higher quality level than the currently active
clock. The following example shows how to configure a manual switch:
Router# network-clock switch manual interface GigabitEthernet 0/0/0
• Clear Manual and Force Switch: Use the network-clock clear switch controller-id command to
clear the manual, or switch it on by force. The following example shows how to clear a switch:
Router# network-clock clear switch t0
• Lock Out a Source: Use the network-clock set lockout command to lock out a clock source. A clock
source flagged as lock-out is not selected for SyncE. To clear the lock-out on a source, use the
network-clock clear lockout command. The following example shows how to lock out a clock
source:
Router# network-clock set lockout interface GigabitEthernet 0/0/0
The following example shows how to clear the lock out on a clock source:
Router# network-clock clear lockout interface GigabitEthernet 0/0/0
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