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Cisco ASR 901 Aggregation Services Router Command Reference Guide
OL-26031-07
Chapter 1 CLI Command Reference
network-clock input-source
network-clock input-source
To configure a clock source line interface, an external timing input interface, a GPS interface, or a
packet-based timing recovered clock as the input clock for the system, use the
network-clock
input-source
command. Use the
no
form of the command to disable the configuration.
network-clock input-source
<priority>
{interface
<interface_name> <slot/port>
| top
<slot/port/>
| {external
<slot/card/port>
[t1 {sf | efs | d4} | e1 [crc4| fas| cas [crc4] | 2m |
10m]}}
no network-clock input-source
Syntax Description
Command Modes
Global configuration
Command History
Usage Guidelines
The
no
version of the command reverses the command configuration, implying that the priority has
changed to undefined and the state machine is informed.
Examples
This example configures the priority of the interface to 23.
Router(config)#
network-clock input-source 23 interface top 0/12
priority
Selection priority for the clock source (1 is the highest priority). When the
higher-priority clock source fails, the next-higher-priority clock source is
selected. Priority is a number between 1 and 250.
interface-name
Specifies the interface name.
slot/port
Specifies the slot/port name.
external
Refers to the external slot/card/port. This command also configures the type
of signal for an external timing input interface. These signals are:
•
T1 with Standard Frame format or Extended Standard Frame format.
•
E1 with or without CRC4
•
2 MHz signal
•
Default for Europe or Option I is e1 crc4 if the signal type is not
specified.
•
Default for North America or Option II is t1 esf if signal type is not
specified.
Release
Modification
15.1(2)SNG
Support for this command was introduced on the Cisco ASR 901 router.
