MSR Routers
NTP Configuration Examples

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contents

Introduction· 1

Prerequisites· 1

Example: Configuring the NTP client/server mode· 1

Network configuration· 1

Software version used· 1

Procedures· 2

Configuring Device A· 2

Configuring Device B· 2

Configuring Device C· 2

Verifying the configuration· 3

Configuration files· 3

Related documentation· 4

 

Introduction

This document provides NTP configuration examples.

Prerequisites

The following information applies to Comware 7-based MSR router series. Procedures and information in the examples might be slightly different depending on the software or hardware version of the routers.

The configuration examples were created and verified in a lab environment, and all the devices were started with the factory default configuration. When you are working on a live network, make sure you understand the potential impact of every command on your network.

The following information is provided based on the assumption that you have basic knowledge of NTP.

Example: Configuring the NTP client/server mode

Network configuration

As shown in Figure 1, Device A on the network can be used as a time server to provide accurate time synchronization. Configure the NTP client/server mode to enable all devices to synchronize the time with Device A.

Figure 1 Network diagram

 

Software version used

This configuration example was created and verified on R6749P14 of H3C MSR3610-X1.

Procedures

Configuring Device A

# Assign an IPv6 address to GigabitEthernet 1/0/1.

<DeviceA> system-view

[DeviceA] interface gigabitethernet 1/0/1

[DeviceA-GigabitEthernet1/0/1] ip address 1.0.1.11 24

[DeviceA-GigabitEthernet1/0/1] quit

# Enable the NTP service.

[DeviceA] ntp-service enable

# Specify the local clock as the reference source, with the stratum level 2.

[DeviceA] ntp-service refclock-master 2

Configuring Device B

# Assign an IP address to GigabitEthernet 1/0/1.

<DeviceB> system-view

[DeviceB] interface gigabitethernet 1/0/1

[DeviceB-GigabitEthernet1/0/1] ip address 1.0.1.12 24

[DeviceB-GigabitEthernet1/0/1] quit

# Enable the NTP service.

[DeviceB] ntp-service enable

# Configure Device B to obtain time through NTP.

[DeviceB] clock protocol ntp

# Specify Device A as the NTP server of Device B.

[DeviceB] ntp-service unicast-server 1.0.1.11

Configuring Device C

# Assign an IP address to GigabitEthernet 1/0/1.

<DeviceC> system-view

[DeviceC] interface gigabitethernet 1/0/1

[DeviceC-GigabitEthernet1/0/1] ip address 1.0.1.13 24

[DeviceC-GigabitEthernet1/0/1] quit

# Enable the NTP service.

[DeviceB] ntp-service enable

# Configure Device C to obtain time through NTP.

[DeviceC] clock protocol ntp

# Specify Device A as the NTP server of Device C.

[DeviceC] ntp-service unicast-server 1.0.1.11

Verifying the configuration

# Verify that Device B and Device C have synchronized the time with Device A. Device B is used in this example.

[DeviceB] display ntp-service status

 Clock status: synchronized

 Clock stratum: 3

System peer: 1.0.1.11

 Local mode: client

 Reference clock ID: 1.0.1.11

 Leap indicator: 00

 Clock jitter: 0.003479 s

 Stability: 0.000 pps

 Clock precision: 2^-16

 Root delay: 1.95313 ms

 Root dispersion: 28.38135 ms

 Reference time: d5ed8cd5.577006ea  Wed, Sep 25 2017 16:24:53.341

System poll interval: 8 s

The command output shows that Device B has synchronized the time with Device A. Its stratum level is 3, which is 1 stratum higher than Device A.

# Verify that an NTP association has been established between Device B and Device A.

[DeviceB] display ntp-service sessions

        source          reference       stra reach poll  now offset  delay disper

********************************************************************************

[12345]1.0.1.11        127.127.1.0        2   255   64   38 -10.22 1.9531 3.3416

Notes: 1 source(master), 2 source(peer), 3 selected, 4 candidate, 5 configured.

 Total sessions: 1

Configuration files

·     Device A:

#

interface GigabitEthernet1/0/1

 ip address 1.0.1.11 255.255.255.0

#

 ntp-service enable

 ntp-service refclock-master 2

·     #

·     Device B:

#

interface GigabitEthernet1/0/1

 ip address 1.0.1.12 255.255.255.0

#

clock protocol ntp

 ntp-service enable

 ntp-service unicast-server 1.0.1.11

#

·     Device C:

#

interface GigabitEthernet1/0/1

 ip address 1.0.1.13 255.255.255.0

#

clock protocol ntp

 ntp-service enable

 ntp-service unicast-server 1.0.1.11

#

Related documentation

·     Network Management and Monitoring Configuration Guide in H3C MSR Router Series Comware 7 Configuration Guides

·     Network Management and Monitoring Command Reference in H3C MSR Router Series Comware 7 Command References