Cisco Systems A9014CFD Verifying Hybrid modes, 22-38, Router# show running-config section ptp

Chapter 22 Configuring Clocking

Configuring PTP for the Cisco ASR 901 Router

	Command or Action	Purpose
Step 4	clock-port port-nameslave	Sets the clock port to PTP slave mode and enters the clock
		port configuration mode. In slave mode, the port exchanges
	Example:	timing packets with a PTP master clock.
	Router(config-ptp-clk)# clock-port
	SLAVE slave
Step 5	transport ipv4 unicast interface	Sets port transport parameters.
	interface-type interface-number	• interface-type—The type of the interface.
	[negotiation]
		• interface-number—The number of the interface.
	Example:	• negotiation—(Optional) Enables dynamic discovery
	Router(config-ptp-port)# transport	of slave devices and their preferred format for sync
	ipv4 unicast interface Loopback 0	interval and announce interval messages.
	negotiation
Step 6	clock source source-address	Specifies the address of a PTP master clock.
	Example:
	Router(config-ptp-port)# clock
	source 133.133.133.133
Step 7	clock-port port-namemaster	Sets the clock port to PTP master mode. In master mode,
		the port exchanges timing packets with PTP slave devices.
	Example:	Note The master clock-port does not establish a clocking
	Router(config-ptp-port)# clock-port	session until the slave clock-port is phase aligned.
	Master master
Step 8	transport ipv4 unicast interface	Sets port transport parameters.
	interface-type interface-number	• interface-type—The type of the interface.
	[negotiation]
		• interface-number—The number of the interface.
	Example:	• negotiation—(Optional) Enables dynamic discovery
	Router(config-ptp-port)# transport	of slave devices and their preferred format for sync
	ipv4 unicast interface Loopback 1	interval and announce interval messages.
	negotiation
Step 9	exit	Exits clock port configuration mode.
	Example:
	Router(config-ptp-port)# exit

Note The hybrid clock (HC) relies on an external clock source for frequency recovery while phase is recovered through PTP. Once the HC reaches the normal or phase aligned state, and if the external frequency channel is active and traceable to PRC, then the HC moves into the phase aligned state even when the PTP link is down.

Verifying Hybrid modes

Use the show running-config section ptp command to display the sample output.

Router# show running-config section ptp

	Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
22-38	OL-23826-09