No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

ME60 V800R010C10SPC500 Feature Description - System Management 01

This is ME60 V800R010C10SPC500 Feature Description - System Management
Rate and give feedback :
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Overview of 1588 ATR

Overview of 1588 ATR

Definition

1588 Adaptive Time Recovery (ATR) is a PTP-based technology that allows ME devices to establish clock links and implement time synchronization over a third-party network using PTP packets in Layer 3 unicast mode.

1588 ATR is an advancement compared to 1588v2, the latter of which requires 1588v2 support on all network devices.

1588 ATR is a client/server protocol through which servers communicate with clients to achieve time synchronization.

NOTE:

ME devices can function only as the 1588 ATR server.

Purpose

1588v2 is a software-based technology used to achieve frequency and time synchronization and can support hardware timestamping to provide greater accuracy. However, 1588v2 requires support from all devices on the live network.

To address this disadvantage, 1588 ATR is introduced to allow time synchronization over a third-party network that includes 1588v2-incapable devices. On the live network, 1588v2 is preferred for 1588v2-capable devices, and 1588 ATR is used when 1588v2-incapable devices exist.

Benefits

This feature offers the following benefits to carriers:

  • Does not require 1588v2 to be supported by all network devices, reducing network construction costs.

  • Fits for more network applications that meet time synchronization requirements.

Features Supported

The 1588 ATR features supported by ME60s are as follows:
  • An ME60 that functions as a 1588 ATR server can synchronize time information with upstream devices using the BITS source and transmit time information to downstream devices.

  • An ME60 that functions as a 1588 ATR server can synchronize time information with upstream devices using 1588v2/G.8275.1 and transmit time information to downstream devices.

NOTE:

An ME60 can function only as the 1588 ATR server. The following restrictions apply to network deployment:

  • When 1588 ATR is used to implement time synchronization over a third-party network, reduce the packet delay variation (PDV) and the number of devices on the third-party network as much as possible in order to ensure time synchronization performance on clients. For details, see performance specifications for clients.

  • The server and client communicate with each other through PTP packets which can be either Layer 3 IP packets or single-VLAN-tagged packets. The PTP packets cannot carry two VLAN tags or the MPLS label.

  • The interface used to send PTP packets on the server needs to be support 1588v2.

Translation
Download
Updated: 2019-01-04

Document ID: EDOC1100059466

Views: 10193

Downloads: 6

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next