From the course: Cisco CCNP ENCOR v1.1 (350-401) Cert Prep: 1 Architecture, Virtualization, and Infrastructure

Unlock this course with a free trial

Join today to access over 23,200 courses taught by industry experts.

Understanding Precision Time Protocol (PTP)

Understanding Precision Time Protocol (PTP)

From the course: Cisco CCNP ENCOR v1.1 (350-401) Cert Prep: 1 Architecture, Virtualization, and Infrastructure

Start my 1-month free trial Buy for my team

Understanding Precision Time Protocol (PTP)

“

We know that NTP, or Network Time Protocol allows us to synchronize our network devices, but there's a more accurate protocol that we're going to consider in this video. It's called PTP, Precision Time Protocol. While NTP is really, really accurate, its goal is to provide accuracy under 10 milliseconds. But PTP, Precision Time Protocol, its goal is to provide accuracy of less than one microsecond. And as a result, we measure that accuracy in terms of nanoseconds. They work a bit differently. NTP has an NTP server from which clients can request time, so I might have one network device go out to my NTP server on my network and say, what time is it, and they can synchronize their time. It's a little bit different with a PTP. Here we have what's called a PTP grandmaster clock. That is the authoritative time source for a PTP domain, and it's going to periodically push time out to other PTP clocks. And you might be wondering, why do we need such precise time in the network? Well, we don't…

Contents