Cisco Systems SMC-169 Configuring Broadcast-Based NTP Associations, SMC-173, Command or Action

Implementing NTP on Cisco IOS XR Software

How to Implement NTP on Cisco IOS XR Software

	Command or Action	Purpose
Step 3
	server ip-address [version number] [key key-id]	Forms a server association with another system.
	[minpoll interval] [maxpoll interval] [source
	interface-type interface-instance] [prefer]
	Example:
	RP/0/RP0/CPU0:router(config-ntp)# server
	172.16.22.44 minpoll 8 maxpoll 12
Step 4
	peer ip-address [version number] [key key-id]	Forms a peer association with another system.
	[minpoll interval] [maxpoll interval] [source
	interface-type interface-instance] [prefer]
	Example:
	RP/0/RP0/CPU0:router(config-ntp)# peer
	192.168.22.33 minpoll 8 maxpoll 12 source pos
	0/0/0/1
Step 5
	end	Saves configuration changes.
	or	• When you issue the end command, the system prompts
	commit	you to commit changes:
		Uncommitted changes found, commit them before
	Example:	exiting(yes/no/cancel)?
	RP/0/RP0/CPU0:router(config)# end	[cancel]:
	or	– Entering yes saves configuration changes to the
	RP/0/RP0/CPU0:router(config)# commit
		running configuration file, exits the configuration
		session, and returns the router to EXEC mode.
		– Entering no exits the configuration session and
		returns the router to EXEC mode without
		committing the configuration changes.
		– Entering cancel leaves the router in the current
		configuration session without exiting or
		committing the configuration changes.
		• Use the commit command to save the configuration
		changes to the running configuration file and remain
		within the configuration session.

Configuring Broadcast-Based NTP Associations

This task explains how to configure broadcast-based NTP associations.

Note No specific command enables NTP; the first NTP configuration command that you issue enables NTP.

Broadcast-Based NTP Associations

Broadcast-based NTP associations should be used when time accuracy and reliability requirements are modest and if your network is localized and has a large number of clients (more than 20). Broadcast-based NTP associations also are recommended for use on networks that have limited bandwidth, system memory, or CPU resources.

Cisco IOS XR System Management Configuration Guide

SMC-173