Can Network Startups Stay Small and Survive ?
A client recently asked me about startups in the networking space and how to pick the one whose products be around for five years. After some research and reflection, I am beginning to realise that size doesn’t matter like it used to. While big companies selling hardware have big costs, small companies selling software can […]
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Overlay Networking as a Method to Scale Flow Networking and Handling
Overlay Networking and Coarse Flow Table are two ways to scale up the flow networking for SDN.
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Tech Notes: Audio Ping Response From The Terminal / CLI
The following command line will use the Text to Speech converter in *nix to say the word "pingtastic" every time a successful icmp response message is received using the ping command.
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Basics: The Difference Between Bandwidth and Speed
A link in a network is determined by two factors, bandwidth and speed. These are usually the same but not always. Speed is bit rate of the circuit while bandwidth is the amount of “speed” available for use. As an example, a 500 Megabit Ethernet MPLS service which uses a 1 Gigabit Ethernet connection to site […]
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Musing: Who Cares About FCoE in 2015 ?
While I continue to scratch my head about who is foolish enough to actually deploy FCoE, perhaps a more important question is which vendors care about it ?
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Blessay: Enterprise IT Comes Last In Technology Innovation
There was a time when Enterprise IT defined the future of computing. Laptops were designed for corporate consumption first and the best software was sold to enterprise for business use. The other markets for computers was “home users” who were offered cheap, low quality and low performance versions of corporate computers. IT was critical to the […]
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Musing: Could We Replace PCIe Bus With Ethernet Switch ?
I've been thinking about how a data centre architecture would look if we replaced the PCIe bus in servers with an Ethernet fabric. It's more doable than most people think.
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Network Dictionary: Mean Time to Innocence
Define "Mean Time to Innocence"
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Response: IEEE 802.3by – Inventing Their Own Problems to Solve Them
The IEEE actually moved faster than a dead turtle and has a PAR for 25GbE. Except now they are inventing problems that don't need solving and demonstrating how much stupid they can achieve.
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Response: Whats New in systemd, 2015 Edition
Summary of a presentation at FOSDEM about systemd is very interesting. Lots of improvements and practical changes from what I can see that would Linux more usable and viable. But this caught my eye about replacing syslog with HTTP: journald-remoting: the binary logger now has remote support (aka: remoting) via HTTP (instead of the syslog […]
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2015 is all about SDN WAN
The technology that gives me a “nerd hard-on” this month is SDN WAN. Here is why.
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Poster: How To Make a Single Pane of Glass
A Poster for your desk on building a "single pane of glass" network management system.
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Announcing: Pieces of Human Infrastructure Magazine
TL-DR: This week I'm started a magazine style newsletter called "Pieces of Human Infrastructure". You can sign up at http://etherealmind.com/pieces-human-infrastructure-newsletter/
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Could Arista EOS Run On Whitebox Hardware ?
I was recently asked if Arista EOS could run on Whitebox network hardware. From a blog post on the Arista website on July 1, 2013 : In fact, a little known secret is that Arista EOS was intended to run on third-party hardware. The Arista vEOS control plane provides the ability to run as a VM […]
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My Review of 2014. Who Cares ?
I started to think about what happened in 2014 and decide which events changed networking.
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Why Replacing The Fibre Optic Patch Lead Often Fixes Network Problems
When installing Fibre Optic cable care must be taken to ensure that cable is not bent beyond a certain radius. Most people believe this is to prevent breaking of the fibre core but there is a worse scenario.
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Vendor Marketing as a Security Risk – Badge Scans and Sign-up Attack Vectors
Many old-style marketing people believe that capturing your contact information is the first step in making a sale. But any capture of your personal information is also leaking critical security information about your organisation, technology and personnel that are perfect for reconnaisance.
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How Many Hosts In An VLAN or IP Subnet and Why ?
It is common to allocate /24 or /22 subnets to a single VLAN but William writes to ask why and whether is related to broadcasts. What is the best subnet size for VLAN allocation and why ? The answer isn't what you think.
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Unreliable Multicast means Unreliable VMware VSAN
Howard Marks from Deep Storage and long-term curmudgeon sent Ethan & I the following email: As I continue to tilt at the VMware windmill I’m facing fanbois telling me that all you have to do is plug the EVO:RAIL in and turn it on. This of course leaves out the fact that the little sucker still […]
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Are SDN Controllers a Security Risk ?
No. When compared to the operation of existing networks, SDN is much more secure.
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