Skip to main content
Sign Out

Welcome to Dell

My Account
  • Place orders quickly and easily
  • View orders and track your shipping status
  • Create and access a list of your products
  • Manage your Dell EMC sites, products, and product-level contacts using Company Administration.
Sign In Create an Account Premier Sign In Partner Program Sign In
Contact Us

Your Dell.com Carts

Dell SmartFabric OS10 User Guide Release 10.5.4

PDF

PTP time stamping mode

IEEE 1588-2008 Precision Time Protocol (PTP) version 2 (PTPv2) is a nanosecond time and frequency synchronization protocol for packet-based networks. The protocol defines synchronization messages that are used between a master and a slave clock to calculate path delay and time offset.

PTP master passes egress hardware time stamping information of event messages to the slave clock for accurate calculation. OS10 supports two types of time stamping modes:

  • One-step—A timestamp is captured in real time as the message starts transmitting out of the physical port and the timestamp is a part of the synchronization message.
  • Two-step—For two-step operation, the synchronization message is forwarded without modification and a follow-up message is used to transfer the captured timestamp.

By default, one-step clock mode is used. OS10 supports configuration of PTP two-step boundary clock using the ptp clock-mode two-step command.

NOTE:
  • In PTP two-step clock mode, the maximum supported downstream nodes and peers is 60, respectively.
  • Dell Technologies recommends using one-step clock mode instead of two-step clock in high-scale environments.
  • Use only the default synchronization message rates for all profiles in the two-step clock mode.

Rate this content

Accurate
Useful
Easy to understand
Was this article helpful?
0/3000 characters
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please select whether the article was helpful or not.
  Comments cannot contain these special characters: <>()\