NTP Configuration Guide

1. Time Synchronization with NTP

The Network Time Protocol (NTP) enables you to synchronize time among network devices such as routers or switches in a network. It works by using an NTP server that maintains a highly accurate time, and allows clients to query for that time.

1.1. Prerequisites

An NTP server must be installed and configured in your network.
You must know the address of the NTP server.

1.2. Enabling NTP Service

To enable the NTP service, you need to perform the following tasks.

Enable the NTP service
Specify the NTP server

1.2.1. Enabling the NTP service

To enable the NTP service under a specific VRF where NTP server is reachable (usually the inband management VRF), enter the following command:

rtb confd set inband management instance <inband-mgmt-vrf> service ntp

Command Parameters

<inband-mgmt-vrf>

Specify the name of the VRF from which NT is reachable

Example

admin@rtbrick:~$ rtb confd set inband management instance mgmt-vrf service ntp
admin@rtbrick:~$
admin@rtbrick:~$ rtb confd show datastore table dump global.instance.inband.mgmt.config
object: 1, sequence: 2, last update: Tue Sep 22 14:54:49 GMT +0000 2020
  attribute: instance_name (1), type: string (9), length: 9, value: mgmt-vrf
admin@rtbrick:~$

1.2.2. Specifying the NTP Server

To specify the NTP server, perform the following tasks:

1.2.2.1. Specify the IPv4 Server Address

To specify the IPv4 server address, enter the following command:

rtb confd set system ntp server <ntp_server_id> address <server_address>

Command Parameters

<ntp_server_id>

Specifies the name of the NTP server.

<server_address>

Specifies the IPv4 address of the NTP server.

Example

admin@rtbrick:~$ rtb confd set system ntp server Server1 address 1.1.1.1
admin@rtbrick:~$
admin@rtbrick:~$ rtb confd show datastore table dump global.ntp.config
object: 1, sequence: 1, last update: Tue Sep 22 14:47:07 GMT +0000 2020
  attribute: ntp_server_id (1), type: string (9), length: 8, value: Server1
  attribute: ntp_server_ipv4 (2), type: ipv4addr (12), length: 4, value: 1.1.1.1
admin@rtbrick:~$

1.2.2.2. Specify the Domain Name of the NTP Server

To specify the domain name of the NTP server, enter the following command:

rtb confd set system ntp server <ntp_server_id> domain-name <server_domain_name>

Command Parameters

<ntp_server_id>

Specifies the name of the NTP server.

<server_domain_name>

Specifies the domain name of the NTP server.

Example

admin@rtrick:~$ rtb confd set system ntp server Server2 domain-name 0.ubuntu.pool.ntp.org

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