White Rabbit High-availability Seamless Redundancy (HSR)
WR-HSR is a research project to implement the High availability Seamless
Ring (HSR) protocol (IEC 62439-3 Clause 5) on White Rabbit switches and
dual-port end nodes.
The implementation is not part of the roadmap of the White Rabbit
project.
Fig1: HSR typical network topology.
Introduction
HSR guarantees zero-time recovery in case of single point of failure. Including the protocol in WR elements, we could extend HSR features to time and frequency distribution in WR ring networks.
WR-HSR with Transparent Clocks + Ordinary Clocks
Peer Delay Mechanism
!{width: 50%;}https://www.ohwr.org/project/wr-hsr/uploads/ed9f9ac33229c6b76d6fedd8caae1005/peerdelay.png
{width:400px}https://www.ohwr.org/project/wr-hsr/uploads/9cd29cb4c598ed697dd4925ee2ed6105/peerdelayzooming.png!
Peer to Peer Transparent Clocks
{width:400px}https://www.ohwr.org/3855
Project information
- Official production documentation: EDMS EDA-02408
- Software
- Frequently Asked Questions
- Users
Contacts
Project
- José Luis Gutiérrez - University of Granada - General questions about project
Project Status
Date | Event |
01-07-2014 | Start of brainstorming to increase reliability in WR networks. |
01-10-2014 | HSR as first candidate for adding reliability in WR networks. |
12-10-2014 | Starting to study of the HSR protocol and how to implement it for WR |
08-04-2015 | Starting implementation on the WRS |
17-04-2015 | Problem: what about WR syntonization using pure TC? |
Possible solution: fake TC = BC + forwarding sync/follow_up. Problem: switchover will not be 0 time recover | |
20-04-2015 | Porting César's PeerDelay implementation to current version of PPSi |
8 April 2015