What is PTP Cisco?
The Precision Time Protocol (PTP), as defined in the IEEE 1588 standard, synchronizes with nanosecond accuracy the real-time clocks of the devices in a network. The clocks are organized into a master-member hierarchy. PTP identifies the switch port that is connected to a device with the most precise clock.
How does Precision Time Protocol work?
The Precision Time Protocol, PTP, is designed to synchronize clocks on a local area network (LAN) to sub-microsecond precision….PTP messages
- The master initiates the sync by sending a sync message.
- The slave sends a delay request message back to the master.
- The master responds with a delay response message.
How do I setup a PTP network?
To configure PTP options:
- In configuration mode, go to the [edit protocols ptp] hierarchy level:
- Configure the clock mode as either boundary or ordinary.
- Configure the PTP domain option with values from 0 through 127.
- Configure the priority1 option with values from 0 through 254.
What is PTP interface?
The Precision Time Protocol (PTP) is a protocol used to synchronize clocks throughout a computer network. On a local area network, it achieves clock accuracy in the sub-microsecond range, making it suitable for measurement and control systems.
What OSI layer is NTP?
Term. OSI Layer 7. Definition. Application Layer “End User Layer” Protocols – DCHP, DNS, FTP, HTTP, IMAP4, NNTP, POP3, SMTP, SNMP, SSH, TELNET, NTP.
Is NTP bidirectional?
NTP requires bi-directional access on port 123 because the NTP RFC specifies the following regarding the source port of the client: When operating in symmetric modes (1 and 2), this field must contain the NTP port number PORT (123) assigned by the IANA.
What is the difference between PTP and SyncE?
PTP differs significantly from SyncE in that a protocol (specified in IEEE1588 v2) is used to deliver the timing to the edge of the network. This immediately overcomes the problem in SyncE of requiring every hardware device to be upgraded. In PTP the packets can traverse the network just like any other protocol.
How does Cisco NTP work?
Network Time Protocol (NTP) is a protocol designed to time-synchronize a network of machines. NTP runs on User Datagram Protocol (UDP), which in turn runs on IP. NTP Version 3 is documented in RFC 1305. This module describes how to configure Network Time Protocol on Cisco devices.