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22-12
Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 22 Configuring Clocking
Configuring Network Clock for Cisco ASR 901 Router
Synchronization Example
Example 22-1 Configuration for QL-disabled mode clock selection
network-clock synchronization automatic
network-clock input-source 1 interface ToP0/12
network-clock input-source 2 External 0/0/0 10m
network-clock input-source 20 interface GigabitEthernet0/1
network-clock input-source 21 interface GigabitEthernet0/4
network-clock output-source system 1 External 0/0/0 e1 crc4
!
interface GigabitEthernet0/1
synchronous mode
synce state slave
!
interface GigabitEthernet0/4
negotiation auto
synchronous mode
synce state slave
end
Example 22-2 GPS Configuration
10MHz signal
network-clock input-source 1 External 0/0/0 10m
2M signal
network-clock input-source 1 External 0/0/0 2048K
Command Purpose
network-clock switch force {interface
interface_name
slot
/
port
| external
slot
/
card
/
port
}
Example:
Router(config)# network-clock switch
force interface GigabitEthernet 0/1 t1
Forcefully selects a synchronization source irrespective
of whether the source is available and is within the
range.
network-clock switch manual {interface
interface_name
slot
/
port
| external
slot
/
card
/
port
}
Example:
Router(config)# network-clock switch
manual interface GigabitEthernet 0/1 t1
Manually selects a synchronization source, provided the
source is available and is within the range.
network-clock clear switch
{
t0
|
external
slot/card/port
[
10m
|
2m
]}
Example:
Router(config)# network-clock clear
switch t0
Clears the forced switch and manual switch commands.