Cisco Router as NTP Server / Configure NTP on Cisco routers

In this article will demonstrate on how to configure cisco router to act as ntp server. One command is essential and the others are optional, the essential one is the following:
R1(config)#ntp master 1
1 is the stratum number. it can be assigned from 1 to 15.
One of the optional commands:
R1(config)#ntp source gig0/0
The above command means the router will distribute the time to the ntp clients via the interface gig0/0.

To configure cisco router as ntp client
https://netsyshorizon.blogspot.com/2019/04/configure-cisco-router-as-ntp-client-server-configuring-synchronized.html

The following video is simple and short.It's explaining how to configure cisco router as ntp server and also exlaining how to configure it as ntp client.

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