Is NTP server necessary?

However, proper network time synchronization is an essential part of monitoring a network and resolving issues within it. Numerous organizations have network devices that use an internal clock or make use of a Public Internet Time Server.

Why is NTP important?

Network Time Protocol (NTP) is a protocol that allows the synchronization of system clocks (from desktops to servers). Having synchronized clocks is not only convenient but required for many distributed applications. Therefore the firewall policy must allow the NTP service if the time comes from an external server.

Can a router be a time server?

When no authoritative time sources are available, and you still need to synchronize clocks throughout a network, you can configure a router to act as an NTP master server. This distinction is important because routers acting as NTP masters can synchronize their entire network to an incorrect time.

How often are NTP packets sent?

every 4 to 8 minutes
When the client clock is operating within a sufficient small offset from the server clock, NTP lengthens the polling interval and sends the eight-packet burst every 4 to 8 minutes (or 256 to 512 seconds).

Does latency affect NTP?

NTP “subtracts” latency from the times, so that a high-latency connection won’t affect the accuracy of the time.

How use NTP Linux?

Synchronize Time on Installed Linux Operating Systems

1. On the Linux machine, log in as root.
2. Run the ntpdate -u command to update the machine clock. For example, ntpdate -u ntp-time.
3. Open the /etc/ntp.
4. Run the service ntpd start command to start the NTP service and implement you configuration changes.

Can a Cisco router be a NTP server?

NTP mode in Cisco Router In this mode, Router reads time from NTP Source. As per requirement, we can configure router’s clock or can use an external clock as NTP source. Once NTP Source is configured, NTP Server router advertises this time in network.