Jeff Tantsura

CTO

San Francisco, California, United States31 yrs 7 mos experience
Most Likely To SwitchAI Enabled

Key Highlights

  • 60+ patents on routing technologies granted.
  • Expert in AI clusters and GPU interconnects.
  • Frequent speaker and industry influencer.
Stackforce AI infers this person is a Networking and AI Infrastructure expert with extensive experience in high-performance computing.

Contact

Skills

Core Skills

Network ArchitectureAi Networking

Other Skills

GPU interconnectAI clusters at scaleNetwork DesignRoutingMPLSIPMultiprotocol Label Switching (MPLS)OSPFQoSInternet Protocol (IP)EthernetTCP/IPWireless TechnologiesNetwork EngineeringBroadband

About

I'm very passionate about networking - the technologies, people, ecosystem and business. Strategist, inventor and innovator - 60+ patents on routing technologies granted, 50+ IETF RFCs/drafts co-authored. Last 3+ years building and innovating on massive GPU interconnects, making Nvidia Spectrum-X the most scalable and best performing AI cluster technology in the industry, leading routing and networking performance. Accomplished writer - author of "Navigating Network Complexity" book. Technical editor of: "Building Data Centers with VXLAN BGP EVPN: A Cisco NX-OS Perspective" "Network Programmability and Automation" Expert level knowledge of end2end, from a radio base station or GPU, throughout core/internet into and within DC networking and services on top. Specialized in AI clusters at scale networking, GPU2GPU interconnects. Early adopter, and implementer of the technologies that have proven rather successful later on - among others: IP FastReroute, BGP EVPN, Segment Routing and ecosystem around, YANG data models, dynamic container routing, Hybrid SDN approach, Intent driven programmable networking, Radio and Transport networks integration, Network Slicing. Being on both, Service Provider and vendor sides I can analyze a product or a solution from either perspective: quality of engineering and complexity, product viability, usability and adaptability to operational practices. Proven track record of building and managing successful products/features, delivering state of art solutions. Building bridges between engineering organizations and customers. Always shining in front of a customer. Frequent speaker at internal and public events. Industry influencer. Self-starter with can do attitude, capable of driving the overall process of getting new products/services delivered across the organization. Excellent interpersonal and people management skills. A good team player and always keen to learn. Advisor to a number of startups in networking and security areas. Active contributor to the IETF and IRTF - co-chair RTGWG and RIFT. Specialties: Network architecture and design, programmability, routing protocols and algorithms Technologies to build AI training and inference clusters at large scale Expert level knowledge of IP Networking and new emerging technologies DC Networking and Fast Convergence, routing at scale - multi-layer and multi-domain Network programmability and SDN, Intent Based Networking, Network Transport Slicing Product management, Strategy and Innovation

Experience

31 yrs 7 mos
Total Experience
3 yrs 4 mos
Average Tenure
6 yrs 7 mos
Current Experience

Nvidia

Distinguished Architect

Mar 2023Present · 3 yrs 3 mos · Santa Clara, California, United States

  • Building the best network and technologies to connect GPUs
AI networkingGPU interconnectAI clusters at scaleNetwork DesignRoutingNetwork Architecture+1

Graphiant

Member of Advisory Board

Sep 2022Jun 2024 · 1 yr 9 mos

Mutually agreed norms for routing security (manrs)

Steering Committee Member

Nov 2021Nov 2022 · 1 yr

  • Making Internet more secure

Microsoft

Sr. Principal Network Architect Azure Networking

Jun 2021Feb 2023 · 1 yr 8 mos · Palo Alto, California, United States

  • Building Next Generation Networking for the most advanced and reliable cloud, architecture for AI/ML backend networks.

Bwg strategy llc

Advisory Board Member

Aug 2020Jan 2023 · 2 yrs 5 mos · New York, United States

Between 0x2 nerds podcast

Co-Founder and Co-Host of "Between 0x2 nerds" podcast

Apr 2020Present · 6 yrs 2 mos · https://www.youtube.com/playlist?list=PLMYH1xDLIabuZCr1Yeoo39enogPA2yJB7

  • Listen to Jeff Tantsura and Jeff Doyle, two self-proclaimed networking nerds. Twice a month they go live and talk about a networking topic near and dear to their hearts. From BGP to IS-IS, from network complexity to network scalability, from EVPN to RPKI. IETF working group chairs and academia, CTOs and researchers, software engineers writing routing code and network architects building new networks - everyone has a place and time with Jeff & Jeff.

Elisity inc.

Member of Exec Advisory Board

Nov 2019Present · 6 yrs 7 mos · Milpitas, CA, USA

Ietf

3 roles

IETF Network Slicing Design Team

Oct 2019Aug 2021 · 1 yr 10 mos

  • ”Develop a framework for providing Network Slicing using IETF TE technologies. The expectation is for IETF technologies such as IP, MPLS and GMPLS, to be used to create specific, isolated, and managed network instances.”
  • Initial data model: https://tools.ietf.org/html/draft-liu-teas-transport-network-slice-yang-00

WG Chair of IETF RIFT(Routing In Fat Trees) WG

Feb 2018Present · 8 yrs 4 mos

  • The Routing in Fat Trees (RIFT) protocol addresses the demands of routing in
  • Clos and Fat-Tree networks via a mixture of both link-state and distance-vector
  • techniques colloquially described as 'link-state towards the spine and distance
  • vector towards the leafs'. RIFT uses this hybrid approach to focus on networks
  • with regular topologies with a high degree of connectivity, a defined
  • directionality, and large scale.

WG Chair of IETF RTGWG (Routing Area Working Group)

Feb 2014Present · 12 yrs 4 mos

Sf bay area isoc chapter

Board Member

Feb 2019Feb 2021 · 2 yrs · San Francisco Bay Area

  • The SF Bay Area ISOC Chapter serves the San Francisco Bay Area including Silicon Valley by promoting the core values of the Internet Society. The SF Bay Area ISOC Chapter was officially recognized by the Internet Society (ISOC) on February 16, 2009.
  • ISOC is a nonprofit organization founded in 1992 to provide leadership in Internet related standards, education, and policy. With offices in Washington, USA, and Geneva, Switzerland, it is dedicated to ensuring the open development, evolution, and use of the Internet for the benefit of people throughout the world.

Apstra - acquired by juniper

Head of Networking Strategy

Oct 2018Jun 2021 · 2 yrs 8 mos · Menlo Park

  • Defining company’s networking strategy and technologies, future directions.
  • Evangelising Intent Based Networking in the industry, numerous presentations at NANOG, ENOG, ITU-T, IEEE, MPLS/SDN WC and relevant work in IETF/IRTF - draft-irtf-nmrg-ibn-concepts-definitions. Closely working with customers, numerous ongoing network architecture and design workshops as well as in depth “deep dives” on particular networking technologies. Architecture and design of Apstra Enterprise edition.
  • Architecture and design of multi-vendor (NX-OS, Junos, EOS and Cumulus) Intent Based: -EVPN in 5 stage CLOS networks
  • EVPN DCI
  • EVPN VRF leaking
  • EVPN ESI multihoming
  • numerous EVPN probes and validations
  • numerous BGP improvements

Nuage networks from nokia

Head of Technology Strategy

Jan 2018Oct 2018 · 9 mos · Mountain View, CA

  • SDx 2.0 vision
  • Co-Architected NFIX (Network Functions Interconnect Fabric for Cloud, IoT and 5G) - DC to WAN to DC Segment Routing based architecture - draft-bookham-rtgwg-nfix-arch
  • TIP(Telecom Infra Project) MEC (Edge computing) tiger team

Earth computing

Member of the Advisory Board

Nov 2017Jan 2022 · 4 yrs 2 mos · Palo Alto,CA

  • Earth Computing is reimagining the datacenter fabric to provide a simple, resilient and secure datacenter foundation. We are pioneers in the emerging Network Defined Software (NDS) market. In combination with standard datacenter class servers and and patent-pending software breakthroughs, we address core issues in the deployment, confinement (security), maintenance and survivability of mission-critical IT infrastructures. Our product roadmap, delivered sequentially, provides critical mechanisms to enable network, storage and computation to cooperate in an underground stack, that scales-out without bottlenecks or single points of failure.

Internet architecture board (iab)

Internet Architecture Board

Mar 2017Apr 2021 · 4 yrs 1 mo · https://www.iab.org/

  • The Internet Architecture Board provides long-range technical direction for Internet development, ensuring the Internet continues to grow and evolve as a platform for global communication and innovation.
  • IAB shepherd for Netslices
  • 5G, low latency networking and applications - ecosystem around

Arrcus, inc.

Member of Technical Advisory Board

Jan 2017Jan 2018 · 1 yr

Volta networks

Member of Advisory Board

Sep 2016Jan 2017 · 4 mos

Futurewei, future networks

VP, Distinguished Engineer Network Architecture

Jul 2016Dec 2017 · 1 yr 5 mos · Santa Clara

Ericsson

2 roles

Head of Technology Strategy Routing (Routing CTO), Director PLM

Oct 2013Jun 2016 · 2 yrs 8 mos · San Francisco Bay Area

  • Defining Routing strategy, coherent feature set across product portfolio, short/long term road-maps. Virtualized products, alignment with Ericsson Cloud portfolio
  • Evangelizing Network Programmability, simplicity and convergence
  • Defining transport SDN controller, contributing to the OpenDaylight
  • Driving force behind adoption of Segment Routing and its integration with OpenDaylight
  • Everything and anything over EVPN
  • Coordinating E/// strategy in IETF Routing Area
  • Active member of E/// Patent Committee as well as Technology Council and Architecture board

Senior Product Manager

Jul 2011Sep 2013 · 2 yrs 2 mos · San Francisco Bay Area

  • Covering all of IP routing, Multicast/NG-mVPNs and most of MPLS.
  • Driving IP fast convergence/IPFRR technologies at E/// and IETF.
  • E/// IP OS evolution into NextGen OS, layering with proper API’s, PI/PD separation as well as NextGen routers portfolio, incl. virtualized products
  • Market and Competitive Analysis
  • Features delivered (co-designed):
  • 50+ BGP, IGP, MPLS & Multicast features.
  • Platform framework for IP FRR (patent granted).
  • BGP FRR.
  • OSPF/ISIS/LDP LFA/rLFA (many relevant patents applications filed/patents granted).
  • Co-designed and delivered Segment Routing set of features + relevant ecosystem and EVPN.

Redback networks

Product Manager

Sep 2007Jun 2011 · 3 yrs 9 mos

  • IP routing, MPLS and Multicast
  • Driving IP FRR/general IP convergence, IP Multicast and mVPNs, MPLS/routing enhancements

Ssc plus

Network Consultant

Jan 2007Sep 2007 · 8 mos · The Netherlands

  • T-Mobile:
  • Design and Architecture of the new MPLS core network
  • Migration of legacy networks into new MPLS backbone, QoS and MPLS-TE

Upc broadband

Senior Network Engineer

May 2005Dec 2006 · 1 yr 7 mos · The Netherlands

  • High/low level network design, project evaluation and validation, feasibility and proof of concept testing and offering in-depth technical solutions.
  • Vendor selection
  • BGP peering, BGP policy standardization, BGP TE, BGP community tagging framework
  • Design and rollout of multicast in AORTA (UPC World Wide backbone)
  • Design and implementation of BGP RTBH security framework in AORTA
  • Integration of new subsidiaries – UPC France, Romania, Swiss into global routing domain

Cap gemini bv

Senior Consultant

May 2004Apr 2005 · 11 mos · The Netherlands

  • Consultancy for networking projects

Essent kabelcom nv

Senior Network Developer/Architect

Jun 1999May 2004 · 4 yrs 11 mos · The Netherlands

  • Network Design and Architecture:
  • Design and rollout of the new backbone (BGP, OSPF); BGP peering and TE.
  • Integration of Essent and @Home Benelux IP Networks into a single IP Backbone.
  • Design and rollout of QoS, deployment of VoIP(prioritization of voice, signaling)
  • Design and rollout of Multicast in the core and access networks (IGMP,CGMP,PIM,MSDP,MBGP)
  • Design, testing & implementation of Layer 2 over Layer 3 technologies (UTI/L2TPv3/AToM)

Isracom ltd

System/Network Engineer

Jan 1994Dec 1998 · 4 yrs 11 mos · Pardes Hanna, Israel

  • Routing, administration of mail, DNS, Web platforms, security

Education

University of California, Berkeley, Haas School of Business

Berkeley Executive Leadership Program

Jan 2019Jan 2019

University of California, Berkeley, Haas School of Business

Executive Certificate of Business Excellence

Jan 2011Jan 2013

Technical University Of Georgia

Master's Degree — Computer Science and Systems Analysis

Jan 1988Jan 1992

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