Cisco ASR 9000 Series User Manual

SUMMARY STEPS
1.
configure
2.
ntp
3.
master stratum
4.
Use one of the following commands:
•
end
•
commit
DETAILED STEPS
PurposeCommand or Action
configure
Step 1
Enters NTP configuration mode.ntp
Example:
RP/0/RSP0/CPU0:router(config)# ntp
Step 2
Makes the router an authoritative NTP server.
master stratum
Step 3
Example:
RP/0/RSP0/CPU0:router(config-ntp)#
master 9
Use the master command with caution. It is very easy to override
valid time sources using this command, especially if a low stratum
number is configured. Configuring multiple machines in the same
network with the master command can cause instability in time
keeping if the machines do not agree on the time.
Note
Saves configuration changes.Use one of the following commands:
Step 4
•
end
•
When you issue the end command, the system prompts you to commit
changes:
Uncommitted changes found, commit them before
•
commit
Example:
RP/0/RSP0/CPU0:router(config-ntp)#
end
exiting(yes/no/cancel)?
[cancel]:
◦
Entering yes saves configuration changes to the running
configuration file, exits the configuration session, and returns the
router to EXEC mode.
or
RP/0/RSP0/CPU0:router(config-ntp)#
commit
◦
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 ASR 9000 Series Aggregation Services Router System Management Configuration Guide, Release 5.1.x
221
Implementing NTP
Configuring the System as an Authoritative NTP Server

Cisco ASR 9000 Series Specifications

General

Series	ASR 9000
Category	Network Router
Modular Design	Yes
Redundancy	Yes (Hardware and Software)
Operating System	Cisco IOS XR
Interfaces/Ports	10G, 40G, 100G, 400G Ethernet
Expansion Slots	Varies by model
Routing Protocol	BGP, OSPF, IS-IS, EIGRP
Management	CLI, SNMP, NETCONF
Power Supply	Redundant
Port Density	Varies by model
Power Supply Options	AC, DC
Memory	Varies by model
Storage	Varies by model
Dimensions	Varies by model
Weight	Varies by model