enterprise profile for precision time protocol · enterprise profile for precision time protocol ...
TRANSCRIPT
![Page 1: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/1.jpg)
Enterprise Profile for Precision Time Protocol
www.meinbergglobal.com
Doug ArnoldPrincipal Technologist
Accurate time. Worldwide.
![Page 2: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/2.jpg)
Agenda
Enterprise Profile
History
Standards initiative
PTP features
Mixed multicast unicast
Multidomain operation
Summary
www.meinbergglobal.com
![Page 3: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/3.jpg)
Enterprise Profile for PTP
Intended for enterprise networks, especially in financial
companies
Draft RFC in IETF
Main PTP features:
Mixed multicast/unicast operation
Multi domain operation for grandmaster redundancy
www.meinbergglobal.com
![Page 4: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/4.jpg)
History
Proposed by Pedro Estrella of IMC TradingChallenges Deploying PTPv2 in a Global Financial Company, Pedro V
Estrela and Jan L Bonebakker, ISPCS San Francisco, 2012
Draft RFC in IETF
tictoc Working GroupEnterprise Profile for Precision Time Protocol with Mixed Multicast and
Unicast
Tested at ISPCS IEEE 1588 Plugfest2014-2016
www.meinbergglobal.com
![Page 5: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/5.jpg)
Profile
Layer 3IPv4
IPv6
Delay Request-Response propagation delay measurement
BCs, TCs allowed but not required
Mixed multicast and unicast operationPure multicast slaves allowed
Delay Responses sent in same communication mode as Delay Request
www.meinbergglobal.com
![Page 6: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/6.jpg)
Profile
Message ratesDefault Sync rate (Follow Up): 1/sec
Default Delay Request rate (Delay Response): 1/sec
Default Announce rate: 1/sec
Minimum message rate: 1/128 sec
Maximum message rate: 128/sec
Multi-domain operationNetwork elements may include PTP instances in multiple domains for
redundancy
No performance criteria defined
www.meinbergglobal.com
![Page 7: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/7.jpg)
PTP messages for 1-step clocks
www.meinbergglobal.com
![Page 8: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/8.jpg)
Multicast PTP
www.meinbergglobal.com
![Page 9: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/9.jpg)
Unicast PTP
www.meinbergglobal.com
![Page 10: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/10.jpg)
Mixed Multicast and Unicast PTP
www.meinbergglobal.com
![Page 11: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/11.jpg)
www.meinbergglobal.com
Multidomain clock
GM GM
Domain 0 slave
Domain 1 slave
Robust clock
Domain 2 slave
GM
Multidomain operation
![Page 12: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/12.jpg)
Simulation with 3 GMs, 1 with ramp error
www.meinbergglobal.com
![Page 13: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/13.jpg)
Simulation of robust clock
www.meinbergglobal.com
![Page 14: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/14.jpg)
Enterprise profile at the ISPCS Plugfest
www.meinbergglobal.com
Tested at the last three
ISPCS Plugfest events
ISPCS 2015 Beijing
• 5 participating
organizations
• HW and SW
implementations
tested
ISPCS 2016 Stockholm
• Nine participating
organizations
• Multidomain
• IPv4 and IPv6
![Page 15: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/15.jpg)
Summary:
www.meinbergglobal.com
Enterprise ProfileGood for networks with no on path support
and a lot of slaves
Defined in IETF
Mixed multicast unicast operationReduce unwanted messages on multicast addresses at slave ports
Multidomain PTP for robustnessAllows slave clocks to use robust voting algorithms
Tested at ISPCS Plugfest
![Page 16: Enterprise Profile for Precision Time Protocol · Enterprise Profile for Precision Time Protocol Doug Arnold Principal Technologist doug.arnold@meinberg-usa.com Accurate time](https://reader033.vdocument.in/reader033/viewer/2022052719/5f0789797e708231d41d7924/html5/thumbnails/16.jpg)
Thank you for you attention.Questions?
www.meinbergglobal.com
Doug ArnoldPrincipal Technologist
Accurate time. Worldwide.