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About Author: Peter Havrila

Peter Havrila
Website
https://peterhavrila.com
Description
Peter's Profile Page

Posts by Peter Havrila

  • After a longer break, I managed to get back to my small visualization experiment from last time, and improve it a little. Firstly, the NETCONF interface was switched for a […]

    [mini-update] Network Topology Visualization #2 – Using SNMP as data source and enhanced visuals

    Posted on September 17, 2019 | 24 Comments
    After a longer break, I managed to get back to my small visualization experiment from last time, and improve it a little. Firstly, the NETCONF interface was switched for a […]

    Continue Reading...

  • Ok, first let’s get one thing clear. This is an educational project for me learning some computer vision algorithms (I want to make an insect identification system to protect a […]

    Autopilot for Elite Dangerous using OpenCV and thoughts on CV enabled bots in visual-to-keyboard loop

    Posted on August 11, 2018 | 26 Comments
    Ok, first let’s get one thing clear. This is an educational project for me learning some computer vision algorithms (I want to make an insect identification system to protect a […]

    Continue Reading...

  • Ok, this is a continuation of two streams of articles here, first my recent NETCONF tutorial here, and secondly my very old project (back then in Java) of visualization of […]

    Network Topology Visualization – Example of Using LLDP Neighborships, NETCONF and little Python/Javascript

    Posted on December 12, 2017 | 18 Comments
    Ok, this is a continuation of two streams of articles here, first my recent NETCONF tutorial here, and secondly my very old project (back then in Java) of visualization of […]

    Continue Reading...

  • So let’s learn about NETCONF, but first a bit of history and perspective. Everyone in networking business at least once heard about SNMP (Simple Network Management Protocol), which is the […]

    HP Networking/Comware NETCONF interface quick tutorial (using python’s ncclient and pyhpecw7)

    Posted on December 11, 2017 | 6 Comments
    So let’s learn about NETCONF, but first a bit of history and perspective. Everyone in networking business at least once heard about SNMP (Simple Network Management Protocol), which is the […]

    Continue Reading...

  • After working with Mikrotik / RouterBoard routers for a long time, I recently needed to replace an aging old wifi router at my parents and the recent brand of very […]

    [minipost] Protecting SSH on Mikrotik with 3-strike SSH ban using only firewall rules

    Posted on September 9, 2017 | No Comments
    After working with Mikrotik / RouterBoard routers for a long time, I recently needed to replace an aging old wifi router at my parents and the recent brand of very […]

    Continue Reading...

  • The target was simple, we have an internal cloud datacenter at work that provides users and customers both virtual machines and physical machines. Each machine has to network interface cards […]

    Example of private VLAN isolation across Virtual and Physical servers using ESX/dvSwitch and HP Networking Comware switches

    Posted on May 26, 2017 | 1 Comment
    The target was simple, we have an internal cloud datacenter at work that provides users and customers both virtual machines and physical machines. Each machine has to network interface cards […]

    Continue Reading...

  • REST-full API, the new trendy bandwagon of cloud automation and SDN due to its simplicity and universal compatibility. TI is essentially a http transfer protocol with JSON payload. And if […]

    HPE’s DCN / Nuage SDN – Part 3 – REST API introduction

    Posted on December 26, 2016 | 2 Comments
    REST-full API, the new trendy bandwagon of cloud automation and SDN due to its simplicity and universal compatibility. TI is essentially a http transfer protocol with JSON payload. And if […]

    Continue Reading...

  • Here I was getting a trouble with communication between an ESX virtual machine and the nearby switch (Nuage/DCN controller VM talking with a VTEP switch if someone is interested) and […]

    [minipost] Capturing bidirectional traffic of virtual machine (VMs) on vmWare ESX 6.x

    Posted on December 10, 2016 | 1 Comment
    Here I was getting a trouble with communication between an ESX virtual machine and the nearby switch (Nuage/DCN controller VM talking with a VTEP switch if someone is interested) and […]

    Continue Reading...

  • In the previous part 1, we have installed basic HPE DCN system on a group of ESXi hosts. But we didn’t actually done anything inside it, so lets fix this […]

    HPE’s DCN / Nuage SDN – Part 2 – First Steps Creating Virtual/Overlay Customer Network

    Posted on September 23, 2016 | 6 Comments
    In the previous part 1, we have installed basic HPE DCN system on a group of ESXi hosts. But we didn’t actually done anything inside it, so lets fix this […]

    Continue Reading...

  • Nuage Networks is a spinoff from Alcatel-Lucent (now under Nokia as they acquisition Alcatel recently) and also a name of software defined network (SDN) overlay solution for datacenters and direct […]

    HPE’s DCN / Nuage SDN – Part 1 – Introduction and LAB Installation Tutorial

    Posted on August 1, 2016 | 8 Comments
    Nuage Networks is a spinoff from Alcatel-Lucent (now under Nokia as they acquisition Alcatel recently) and also a name of software defined network (SDN) overlay solution for datacenters and direct […]

    Continue Reading...

« Older Entries
  • BGP
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    • Cisco BGP Timers re-Explained
    • Nexus 7k – Getting Started Examples Guide – Part 1
    • Cisco IOS XR – Complete Getting Started Examples Guide, Part1/2
    • Basic Load-Balancer Scenarios Explained
    • [minipost] Mikrotik QoS Prioritization Example
  • Recent Articles
    • [mini-update] Network Topology Visualization #2 – Using SNMP as data source and enhanced visuals September 17, 2019
    • Autopilot for Elite Dangerous using OpenCV and thoughts on CV enabled bots in visual-to-keyboard loop August 11, 2018
    • Network Topology Visualization – Example of Using LLDP Neighborships, NETCONF and little Python/Javascript December 12, 2017
    • HP Networking/Comware NETCONF interface quick tutorial (using python’s ncclient and pyhpecw7) December 11, 2017
    • [minipost] Protecting SSH on Mikrotik with 3-strike SSH ban using only firewall rules September 9, 2017
    • Example of private VLAN isolation across Virtual and Physical servers using ESX/dvSwitch and HP Networking Comware switches May 26, 2017
    • HPE’s DCN / Nuage SDN – Part 3 – REST API introduction December 26, 2016
    • [minipost] Capturing bidirectional traffic of virtual machine (VMs) on vmWare ESX 6.x December 10, 2016
    • HPE’s DCN / Nuage SDN – Part 2 – First Steps Creating Virtual/Overlay Customer Network September 23, 2016
    • HPE’s DCN / Nuage SDN – Part 1 – Introduction and LAB Installation Tutorial August 1, 2016
    • Tutorial for small Hadoop cloud cluster LAB using virtual machines and compiling/running first “Hello World” Map-Reduce example project June 12, 2016
    • Ping on you! – Beta 2.0 is online June 4, 2016
    • [minipost]Quick LAB/config example for IPv6 BGP between HP Networking Comware v5 andCisco June 2, 2016
    • Ping on You! – small weekend web/CGI project March 28, 2016
    • [minipost] Windows partition editing with diskpart March 28, 2016
    • Checkpoint Firewall CLI tool “dbedit” and quick lab examples February 27, 2016
    • Soviet Mi-24V Hind E, 1/72 scale June 6, 2015
    • Tutorial for creating first external SDN application for HP SDN VAN controller – Part 3/3: “Node Cutter” SDN application in perl with web interface May 24, 2015
    • Tutorial for creating first external SDN application for HP SDN VAN controller – Part 2/3: Influencing Flows via cURL commands May 23, 2015
    • Tutorial for creating first external SDN application for HP SDN VAN controller – Part 1/3: LAB creation and REST API introduction May 22, 2015
    • Tutorial: Email server for a small company – including IMAP for mobiles, SPF and DKIM May 19, 2015
    • Eycalyptus – cloud introduction and auto-scaling tutorial February 2, 2015
    • Introduction and LAB tutorial of HP Helion Community Edition, the OpenStack based “cloud” system that can give you a personal cloud! June 10, 2014
    • [minipost] Mikrotik/RouterBoard port-knocking example for firewall/NAT openings June 9, 2014
    • [minipost] How to fix MySQL lost table description from .frm files after emergency migration of /var/lib/mysql June 3, 2014
    • Slovak Air Force MiG-29 with 2008 Digital Camoflage, 1/48 March 4, 2014
    • Playing with the new HP SDN Controller – including getting started guide with Open vSwitch in GNS3 January 1, 2014
    • Nexus 7k – Getting Started Examples – Part1 (basics, VDC and vPC) December 19, 2013
    • [minipost] Create a loopback hard-drive partition inside a file in linux December 18, 2013
    • ArmA2 CWR2 mod: Winter Kolgujev + Malden Domination with Xmas extras December 18, 2013
  • Archives
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