For regular visitors to my blog you may have noticed a countdown calendar has appeared again. I have managed to get a lab date in Brussels before the version 5 change. I had previously failed the lab at the mobile lab in London in December and after Christmas my plan was to get one more […]
The post CCIE Version 4 one more attempt! appeared first on Roger Perkin - Networking Articles.
In this episode, Avaya comes on board to talk about new and efficient ways to design data centers. They bring a couple of customers along to discuss their implementations: Fujitsu Technology Solutions and the Sochi 2014 Olympic Winter Games. Speaking with host Greg Ferro are Paul Unbehagen, Chief Architect for Avaya Networking; Albert Knoll, Network […]
The post Show 179 – Avaya Efficient Data Center Design at Fujitsu & the Sochi 2014 Winter Games appeared first on Packet Pushers Podcast and was written by Ethan Banks.
This is “The Coffee Break”. A podcast on state of the networking business where we discuss vendors moves and news, analysis on product and positioning, and look at the business of networking. In the time it takes to have a coffee break.
This is “The Coffee Break”. A podcast on state of the networking business where we discuss vendors moves and news, analysis on product and positioning, and look at the business of networking. In the time it takes to have a coffee break.
The post Coffee Break – Show 2 appeared first on Packet Pushers.
This is “The Coffee Break”. A podcast on state of the networking business where we discuss vendors moves and news, analysis on product and positioning, and look at the business of networking. In the time it takes to have a coffee break.
The post Coffee Break – Show 2 appeared first on Packet Pushers Podcast and was written by Greg Ferro.
Anybody annoyed enough with massive NTP monlist floods over the weekend? If you did like I did, I believe what immediately came to your mind was, “this shouldn’t have happened if they just had put a ‘default ignore’ line in their ntp.conf file!” But unfortunately there are some people who’re not like you, including casual […]
The post One-liner iptables rule to Filter NTP Reflection on Linux Hypervisor appeared first on Packet Pushers Podcast and was written by Tamihiro Yuzawa.
This post represents the solution and explanation for quiz-19. As shown in the quiz, a simple change of the MSTP configuration, for example changing the vlan to instance mapping, can immediatelly create short network cuts. Read along to see full explanation.
Engineers are often unstuck by poor planning and get hit with large financial penalties as a result. Projects can become mired in delays and complications due to unforeseen costs and expenses. There are some unavoidable bumps in the road, but … Continue reading
The post Planning projects instead of burning benjamins appeared first on The Network Sherpa.
For the last 9 months, I've been silently working on a little pet project. It's finally ready to be released in to the wild and to be used by one and all for creating Python-based SDN Applications for the HP VAN SDN Controller.
For the last 9 months, I've been silently working on a little pet project. It's finally ready to be released in to the wild and to be used by one and all for creating Python-based SDN Applications for the HP VAN SDN Controller.
When I started working with the HP VAN SDN Controller (while it still had a cool code name) it became immediately apparent to me that extending the controller with Java applications is not for everyone. There's lots of heavy lifting to be done with things like Maven, OSGi and Remote Debugging. Not only that, but I am not a "Java guy" (or was not until recently to be more exact) and being able to rapidly prototype applications in Python appealed to me.
The HP VAN SDN Controller's REST API exposes a large amount of the functionality available to the Java API with the exception of handling OpenFlow Packet-In, Packet-Out events. For a large number of applications this is absolutely fine, and this is where I hope this library will be useful.
The library is licensed under the Apache 2.0 license so it's free for all to use. The source is hosted on GitHub Continue reading
Part 2 of a this 3 part series examines how I created my Pelican blog and migrated my Wordpress content with me.
Part 2 of a this 3 part series examines how I created my Pelican blog and migrated my Wordpress content with me.
If you haven't read Part 1 already, it will give you some background as to what I'm doing and why I'm doing it.
Assuming you already have a working Python, starting a new blog is as easy as installing a few dependencies and using the pelican-quickstart
pip install pelican Markdown
mkdir blog
cd blog
pelican-quickstart
Welcome to pelican-quickstart v3.3.0.
This script will help you create a new Pelican-based website.
Please answer the following questions so this script can generate the files
needed by Pelican.
> Where do you want to create your new web site? [.]
> What will be the title of this web site? Dave's Blog
> Who will be the author of this web site? Dave Tucker
> What will be the default language of this web site? [en]
> Do you want to specify a URL prefix? e.g., http://example.com (Y/n) Y
> What is your URL prefix? (see Continue readingAccording to news reports, credit card information from Target’s point of sales systems was stolen after hackers gained access to the systems of an HVAC contractor that had remote access to Target’s network.
Network virtualization is an important tool that can be used to prevent (or at the very least place barriers) to similar attacks in the future. Increasingly retail stores deploy multiple applications that must be accessible remotely. HVAC systems are an example, but retail locations also often support signage applications (advertisement panels), wifi guest networks, etc.
Most of these applications will contain a mix of physical systems on the branch, applications running in the data-center, as well a remote access to contractors.
From a network segmentation perspective, it is important to be able to create virtual networks that can span the WAN and the data-center. The obvious technology choice for network virtualization in the branch is to be use MPLS L3VPN. It is a technology that is supported in CE devices and that can be deployed over a enterprise or carrier managed private network.
The branch office CE will need to be configured with multiple VLANs, per virtual-network, where physical systems reside. In order to have a Continue reading
Network operators – service providers, enterprises, engineers, architects, data-centers, campuses, etc. – are responsible for keeping the packets flowing across their network(s). The Internet Engineering Task Force (IETF) designs, develops, and documents the standard protocols network operators use in and on their networks. In a perfect world, operators would be part of the IETF process […]
This short post will show you how to upgrade the software on a single Cisco 3850 switch, a 3850 stack, using TFTP and USB. The process is very easy but it is a bit different than the usual software image of previous switches i.e 3750 etc. The main difference is the Cisco 3850 switch run […]
The post How to upgrade software on a Cisco 3850 Switch appeared first on Roger Perkin - Networking Articles.
The final installment in this three part series. This covers installing Dokku and publishing your pelican blog to you new Docker-powere mini-Heroku.
For the last 9 months, I've been silently working on a little pet project. It's finally ready to be released in to the wild and to be used by one and all for creating Python-based SDN Applications for the HP VAN SDN Controller.
I've been blogging with Wordpress for the last 5 years on and off. It has some great features and is very easy to use, but it's not for me. This series of posts documents my transition from Wordpress to Pelican.
