Cisco Systems SMC-169 manual Supported is md5, SMC-179

Implementing NTP on Cisco IOS XR Software

How to Implement NTP on Cisco IOS XR Software

DETAILED STEPS

	Command or Action	Purpose
Step 1
	configure	Enters global configuration mode.
	Example:
	RP/0/RP0/CPU0:router# configure
Step 2
	ntp	Enters NTP configuration mode.
	Example:
	RP/0/RP0/CPU0:router(config)# ntp
Step 3
	authenticate	Enables the NTP authentication feature.
	Example:
	RP/0/RP0/CPU0:router(config-ntp)# authenticate
Step 4
	authentication-key key-numbermd5 [clear	Defines the authentication keys.
	encrypted] key-name	• Each key has a key number, a type, a value, and,
	Example:	optionally, a name. Currently the only key type
		supported is md5.
	RP/0/RP0/CPU0:router(config-ntp)#
	authentication-key 42 md5 clear key1
Step 5
	trusted-key key-number	Defines trusted authentication keys.
		• If a key is trusted, this router only synchronizes to a
	Example:	system that uses this key in its NTP packets.
	RP/0/RP0/CPU0:router(config-ntp)# trusted-key
	42
Step 6
	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.

Cisco IOS XR System Management Configuration Guide

SMC-179