Cisco Systems A9014CFD manual 22-23

Chapter 22 Configuring Clocking

Configuring PTP for the Cisco ASR 901 Router

	Command	Purpose
Step 6	clock source source-address	Specifies the address of a PTP master clock.
	Example:
	Router(config-ptp-port)# clock
	source 8.8.8.1
Step 7	announce timeout value	(Optional) Specifies the number of PTP announcement
		intervals before the session times out.
	Example:	• value—The range is from 1 to 10. The default is 3.
	Router(config-ptp-port)# announce
	timeout 8
Step 8	delay-req interval interval	(Optional) Configures the minimum interval allowed
		between PTP delay request messages.
	Example:	The intervals are set using log base 2 values, as follows:
	Router(config-ptp-port)# delay-req	• 5—1 packet every 32 seconds
	interval 1
		• 4—1 packet every 16 seconds
		• 3—1 packet every 8 seconds
		• 2—1 packet every 4 seconds
		• 1—1 packet every 2 seconds
		• 0—1 packet every second
		• -1—1 packet every 1/2 second, or 2 packets per second
		• -2—1 packet every 1/4 second, or 4 packets per second
		• -3—1 packet every 1/8 second, or 8 packets per second
		• -4—1 packet every 1/16 seconds, or 16 packets per
		second.
		• -5—1 packet every 1/32 seconds, or 32 packets per
		second.
		• -6—1 packet every 1/64 seconds, or 64 packets per
		second.
		• -7—1 packet every 1/128 seconds, or 128 packets per
		second.
		The default is -6.

	Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09		22-23