Profileimage by Gabor Ivanszky Senior Network Engineer from Szzhalombatta

Gabor Ivanszky


Last update: 23.08.2015

Senior Network Engineer

Graduation: M.Sc. Information Engineerin
Hourly-/Daily rates: show
Languages: German (Elementary) | English (Full Professional) | Hungarian (Native or Bilingual)




M.Sc. in Information Engineering – Sept 1997  -  June, 2002
University of Miskolc, Hungary
  • Ipanema ICOS Expert 20-07-2015
  • Cisco Certified Internetwork Expert Routing & Switching (# 39132) 26-04-2013
    • recert with Data Center written in 2015
  • Juniper Networks Certified Internet Specialist, Enterprise Routing and Switching 27-Dec-2011 (inactive)
  • Juniper Networks Certified Internet Specialist, Enterprise Routing 18-Sep-2009 (expired)
  • Juniper Networks Certified Internet Associate, Enterprise Switching 13-Oct-2009 (expired)
  • Cisco Quality of Service Exam(642-642) 8-May-2009
  • Cisco Certified Network Professional 21-Dec-2006
  • Cisco Certified Network Associate  25-Feb-2003
  • Network operating systems: IOS, IOS-XR, IOS-XE, JunOS
  • Programming languages: basic level in C, C++, PHP, Python, Perl, JAVA, TCL
  • Basics of administering Debian Linux systems
  • Concepts: IP networking(IPv4/IPv6, OSPF, EIGRP, RIP, ISIS, BGP, L3/L2 MPLS VPN, VRF Lite, IP Multicast, QoS, MPLS-TE) , Ethernet, STP, DSL, basics of transmission networks(TDM, WDM), Cisco Nexus, Virtual Networking(N1k), Data Center, Cisco Unified Computing, OTV, LISP, FabricPath, FibreChannel, NetFlow, Port Security, DHCP Snooping, IP Source Guard, HSRP, IP SLA, SPAN, AAA, Syslog, UDLD, WAN Acceleration(Riverbed Stealhead), Ipanema
  • Huawei: core switching, advanced routing(MPLS VPN)
  • RIPE NCC: Local Internet Registry (LIR) Training Course, DNS for LIRs Training Course, Routing Registry Training Course(2006, 2008/updated/)

Project history

  • ANT3 network migration project(Juniper MX for IP/MPLS and Infinera for transmission), working as network design engineer(Dante Ltd., Cambridge, UK) – 2012
  • Hungarian National Telecommunication Backbone (NTG) Migration Project at National Infocommunication Provider (NISZ Zrt.), creating  HLDs – 2011-2012
  • Hungarian NREN (National Research and Education Network) NextGen network implementation project - 2010
    Migrating HBONE core from Cisco 7200/7600 to ASR9k. Technical lead of rollout on ISP(NREN) side. Tier 3 support of ASR9k architecture during and after rollout.
  • Multi Domain Monitoring project – a branch of PerfSonar under GN2 2007
    this project is aimed to deploy and test the implementation of the PerfSonar multi-domain monitoring concept.
  • GÉANT2 project - Bandwidth on Demand workgroup
    Description: The GÉANT2 network provides the high-performance, state-of-the-art network infrastructure for the European Research Area (ERA). BoD workgroup’s goal is to design and implement a framework which can provide guaranteed high-bandwidth connections dynamically (and pre-scheduled) to demanding users spanning different administrative and technology domains.(
  • Final Semester Project as Part of the M.Sc. Curriculum  2002
    Description:  Router simulator software implemented in Java, intended to test Artificial Intelligence (reinforcement learning) usability in IP routing.
  • Design and implementation and post-sale support of an IPSec VPN combined with smartcard technology and RADIUS based authentication, authorization and accounting in small banking environment
  • Design, implementation and operation of a web based access connectivity ordering system using ERW framework
  • Application level firewall tester        2001
Design and implementation of a client-server based test environment (emulator) for Zorp application level firewall at Balabit Ltd. (
  • British Telecom (2014- current )
    • Lead Consultant WAN Technical Designer, Novartis AG
400 sites enterprise network with Cisco ISR/G2, ASR1k routers, Riverbed and Ipanema, built on BT’s global MPLS network
  • National Information Infrastructure Development Institute (2002 ­– 2014)
    • Sr. Network engineer (2013-2014), Network Engineer (2006-2013)
      • Technical Lead network engineer (development and operations) of the Hungarian Research and Education IP/MPLS network. GSR12k, ASR9k, ASR1k,  Cat76/65xx, 7206VXR, 2911 ISR G2, c4900, 29/35/37xx switches. 8xx/17xx CPEs
      • Provide solutions for new customer needs (understand the needs, find solution, create the design and implement, document).
      • Provide ongoing tier 3 support for the whole infrastructure. Manage service requests with Cisco TAC.
      • QoS on broadband connected CPEs
      • Network audit(e.g. verification and correction of eBGP and iBGP policies, etc.)
      • Administering and troubleshooting Alcatel 1830PSS DWDM
      • Administering and troubleshooting ADVA FSP 1500/3000 TDM/WDM devices
      • Anritsu Nettest CMA3000/GigabitEthernet instrument, JDSU Ethernet and optical instruments(MTS8000/MTS6000A)
      • Optical cable/connection troubleshooting
      • Configuring network monitoring system (nagios/plugin development/, cricket)
      • on call engineer tasks
  • HBONE NOC Manager/Deputy Head of Network Department (2008-2010)
    • Manage the day-to-day work of the Network Operations Center (5 engineers)
    • handle escalations
    • train NOC members
    • provide input for network strategy
    • lead the design and implementation of solutions for customer needs
  • Research Associate (2002-2006)
    • „Home ADSL service for certified researchers” workflow responsible( ISO 9000)
    • Membership in technical committees for HBONE connectivity and equipment(IP routers, Microwave radio devices) procurements
    • Membership in technical committees for access connectivity procurements
    • Communication facilitator between management level and the HBONE network operation staff
    • Communication with subcontractors(carriers) on administrative level
    • Communication with subcontractors(carriers) on technical level
  • DANTE Ltd., Cambridge, UK  ( 2012 january – 2012 december )
Network design engineer during GEANT3 migration project, secondment
DANTE is the operator of GEANT(European research network). GEANT covers all Europe and has interconnections all over the world.
  • LLD and migration plans for service migrations from Alcatel SDH to Juniper MX VPWS (ISIS, MPLS LDP, BGP, RSVP signalled tunnels)
  • create HLD, LLD, and JUNOS CLI MPLS L3VPN configuration for the combined out of band management network for Juniper MX and Infinera transport devices
extensive use of network inventory software

Time and spatial flexibility

notice period: 6 weeks

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Profileimage by Gabor Ivanszky Senior Network Engineer from Szzhalombatta Senior Network Engineer