Cisco SMC-169 - Manual
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Table of Contents:
- Page 2 – Prerequisites for Implementing NTP on Cisco IOS XR Software; NTP Functional Overview
- Page 3 – How to Implement NTP on Cisco IOS XR Software; Configuring Poll-Based Associations; Poll-Based Associations
- Page 4 – SUMMARY STEPS; DETAILED STEPS; Command or Action
- Page 5 – Configuring Broadcast-Based NTP Associations; Broadcast-Based NTP Associations
- Page 7 – Configuring NTP Access Groups; NTP Access Groups
- Page 10 – Configuring NTP Authentication; NTP Authentication
- Page 12 – Disabling NTP Services on a Specific Interface
- Page 14 – Configuring the Source IP Address for NTP Packets
- Page 16 – Configuring the System as an Authoritative NTP Server
- Page 17 – Updating the Hardware Clock
- Page 19 – Verifying the Status of the External Reference Clock; Examples; The following is sample output from the show ntp status command:
- Page 20 – Configuring Poll-Based Associations: Example
- Page 21 – Configuring NTP Access Groups: Example; Configuring NTP Authentication: Example
- Page 22 – Disabling NTP on an Interface: Example
- Page 23 – Updating the Hardware Clock: Example; Additional References; Related Documents
- Page 24 – RFCs
SMC-169
Cisco IOS XR System Management Configuration Guide
Implementing NTP on Cisco IOS XR Software
Network Time Protocol (NTP) is a protocol designed to time-synchronize devices within a network. The
Cisco IOS XR software implements NTPv4. NTPv4 retains backwards compatibility with the older
versions of NTP, including NTPv3 and NTPv2 but excluding NTPv1, which has been discontinued due
to security vulnerabilities.
This module describes the new and revised tasks you need to implement NTP on your Cisco IOS XR
network.
Note
For more information about NTP on the Cisco IOS XR software and complete descriptions of the NTP
commands listed in this module, you can refer to the
section of this module. To
locate documentation for other commands that might appear in the course of running a configuration
task, search online in the Cisco IOS XR software master command index.
Feature History for Implementing NTP on Cisco IOS XR Software Contents
Contents
•
Prerequisites for Implementing NTP on Cisco IOS XR Software, page SMC-170
•
Information About Implementing NTP on Cisco IOS XR Software, page SMC-170
•
How to Implement NTP on Cisco IOS XR Software, page SMC-171
•
Configuration Examples for Implementing NTP on Cisco IOS XR Software, page SMC-187
•
Additional References, page SMC-191
Release
Modification
Release 2.0
This feature was introduced on the Cisco CRS-1.
Release 3.0
No modification.
Release 3.2
Support was added for the Cisco XR 12000 Series Router.
Release 3.3.0
No modification.
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Summary
Implementing NTP on Cisco IOS XR Software Prerequisites for Implementing NTP on Cisco IOS XR Software SMC-170 Cisco IOS XR System Management Configuration Guide Prerequisites for Implementing NTP on Cisco IOS XR Software The following prerequisites are required to implement NTP in your network opera...
Implementing NTP on Cisco IOS XR Software How to Implement NTP on Cisco IOS XR Software SMC-171 Cisco IOS XR System Management Configuration Guide The communications between machines running NTP (known as “associations”) are usually staticallyconfigured; each machine is given the IP address of all m...
Implementing NTP on Cisco IOS XR Software How to Implement NTP on Cisco IOS XR Software SMC-172 Cisco IOS XR System Management Configuration Guide The following are two most commonly used, poll-based association modes: • Client mode • Symmetric active mode The client and the symmetric active modes s...
