Cisco ASR 901 User Manual

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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

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.

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Cisco ASR 901 Specifications

General

Form Factor	Rack-mountable
Operating Temperature	-40 to 65°C
Product Type	Aggregation Services Router
Rack Height	1 RU
Storage Temperature	-40 to 70°C
Humidity	5% to 95% non-condensing
Weight	4.5 kg
Power Supply	AC or DC
Compliance	RoHS, CE, FCC
Redundancy	Dual power supply option
MTBF	320, 000 hours