In the first part of this two part series, I talked about why it’s important to learn to write — and to learn to write effectively. But how do you become an effective writer? I started with the importance of reading, particularly difficult and regular reading across a broad array of topics. Is there anything else you do to improve your writing skills? Yes — specifically, get yourself edited, and get some practice.
Hey — I’m a pretty good writer, why do I need to get myself edited? After all, I’ve written nine books, hundreds of articles, tens of research papers, and… But that’s just the point, isn’t it? I wrote several large papers (at least I considered them large at the time) while I was in the Air Force, but they never seemed to have the impact I thought they should have. Weren’t they well written? Weren’t they well organized? Well researched? As it turns out, no, not really. I started on my first white paper just after I’d started in the Cisco TAC, reading through the EIGRP code and writing a paper — for internal use only — based on what I could find. Done and I Continue reading
At Interop ’14 New York a few weeks ago, Ethan Banks collected four fellow CCIEs together for a panel discussion about whether we should be studying newer SDN technologies or pursuing the same old traditional certifications. I’ve been getting that kind of question for a while. This post summarizes a few points I took away from the other panelists at the show, with a promise to give some of my own thoughts in the post that follows.
We had a pretty good spread of competing ideas from the four panelists. I couldn’t sit there and furiously write what the others were saying, for later blogging… but thankfully, there were a couple of professionals in the room! While Interop doesn’t normally post audio or video of the sessions, there have been a few trade press articles written about what was discussed the session:
I came away with several ideas from the other panelists that either taught me something or made an existing opinion much stronger.
First, it seemed that there was general agreement that cloud, DevOps, and automation were the point. SDN, which was in the session title and Continue reading
For those of you into expanding your experience through reading, there is a foundational reference at the core of many MBA programs. The book, Eliyahu Goldratt’s The Goal, introduces a concept call the Theory of Constraints. Put simply, the Theory of Constraints is the premise that systems will tend to be limited by a very small number of constraints (or bottlenecks). By focusing primarily on the bottlenecks, you can remove limitations and increase system throughput.
The book uses this theory to talk through management paradigms as the main character works through a manufacturing problem. But the theory actually applies to all systems, making its application useful in more scenarios than management or manufacturing.
Before we get into networking applications, it is worth walking through some basics about the Theory of Constraints. Imagine a simple set of subsystems strung together in a larger system. Perhaps, for example, software development requires two development teams, a QA team, and a regressions team before new code can be delivered.
If output relies on each of these subsystems, then the total output of the system as a whole is determined by the lowest-output subsystem. For instance, imagine that SW1 Continue reading
This is part 16 of the Learning NSX series, in which I will show you how to configure VMware NSX to route to multiple external VLANs. This configuration will allow you to have logical routers that could be uplinked to any of the external VLANs, providing additional flexibility for consumers of NSX logical networks.
Naturally, this post builds on all the previous entries in this series, so I encourage you to visit the Learning NVP/NSX page for links to previous posts. Because I’ll specifically be discussing NSX gateways and routing, there are some posts that are more applicable than others; specifically, I strongly recommend reviewing part 6, part 9, part 14, and part 15. Additionally, I’ll assume you’re using VMware NSX with OpenStack, so reviewing part 11 and part 12 might also be helpful.
Ready? Let’s start with a very quick review.
You may recall from part 6 that the NSX gateway appliance is the piece of VMware NSX that handles traffic into or out of logical networks. As such, the NSX gateway appliance is something of a “three-legged” appliance:
One “leg” (network interface) provides management connectivity among the gateway appliance and Continue reading
Over at CircleID, Geoff Huston has a long’ish article on Title II regulation of the Internet, and the ideals of “net neutrality.” The reasoning is tight and strong — his conclusion a simple one: At its heart, the Internet access business really is a common carrier business. So my advice to the FCC is to […]
My “Was it bufferbloat?” blog post generated an unexpected amount of responses, most of them focusing on a side note saying “it looks like there really are service providers out there that are clueless enough to reorder packets within a TCP session”. Let’s walk through them.
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In recent network designs, the big, hot and heavy chassis switch has become the last option for a number of reasons. Switch Performance and Capacity. Port Density In the past, the most common decision for buying a chassis has been port density. A chassis backplane provides a high speed connection for the line cards to […]
The post Last Chance at Chassis Switch Saloon appeared first on EtherealMind.
Michael Church wrote an interesting answer on Quora, describing a logarithmic scale of programming skills and (even more importantly) hints to follow to get from n00b into the top N% (for some small value of N):
Replace “programmer” with “networking engineer” and read the whole answer ;)
HP’s SDN App Store has finally seen the light of day. This is intended to be a common platform for users and developers, to find and distributed real-world, practical SDN applications. Some of the launch apps include:
It’s interesting to look at the price points for applications. They are certainly not $0.99 apps, but they are still cheaper than typical ‘Enterprise’ software. I think it will take us a while to figure out what the right level of ‘value’ is.
HP has done well to put together a platform that developers can use to distribute SDN applications. It’s not an easy task to put together all of the back-end work required for something like this. It’s not simply hosting a website, it’s figuring out all the legal & financial implications, the support mechanisms, etc. There’s a lot of non-technical effort that goes into this.
The only challenge is that currently it is for SDN apps that use the HP VAN SDN Controller, which will limit the size of the market. I’m hoping that in future it will work with OpenDaylight. That will expand Continue reading
You can ignore big problems but they need big solutions to remove them from the agenda.
The post Big Problems Often Require Big Solutions appeared first on EtherealMind.
A couple of weeks ago, Cloudflare announced a new solution that allows DDOS Protection, Caching and application firewalls of SSL encrypted traffic without handing over the private key. This is a significant breakthrough for companies. Many companies have strong controls over private keys that prevent external sharing. More often the simple cost of key ceremonies is punitive to the business.
The post PQ Show 34 – Cloudflare Keyless SSL appeared first on Packet Pushers Podcast and was written by Greg Ferro.
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Painting by Rene Margritte
Today CloudFlare is publishing its third Transparency Report covering the first half of 2014. This report covers government information requests from January 1, 2013 to June 30, 2014, and updates our two existing transparency reports: partial January 2013 Transparency Report and complete 2013 Transparency Report.
CloudFlare’s Transparency Reports shows how many subpoenas, court orders, search warrants, pen register/trap and trace (PRTT) orders, and national security orders CloudFlare received during the reporting period. In this current Transparency Report, we have also added a separate category for wiretap orders CloudFlare received. CloudFlare’s Transparency Reports also shows how many domains and accounts were affected by our response to those requests during the reporting period. CloudFlare’s Transparency Reports do not include non-governmental requests.
We will continue to update this report on a semiannual basis at Transparency Report.
Special thanks to our legal intern, Murtaza Sajjad, for helping to compile this report.
Plexxi is teaming up with SDNCentral to host DemoFriday on October 24 at 10 a.m. PST. Tune in to hear our own Ed Henry and Nils Stewart demonstrate how to build scalable and manageable Big Data fabrics that easily integrate with systems such as OpenStack and Cloudera. You can register to attend here.
In this week’s PlexxiTube of the week, Dan Backman explains how Plexxi’s Big Data fabric solution is applicable beyond Big Data.
SDN: Unshackling the Network Application Environment
Art Cole claims that SDN will enable the development of a robust ecosystem of network applications in a recent article for Enterprise Networking Planet. As we look at applications, it is worth making the distinction between network apps (things that run on the network) and business apps (apps the network enables). The real value in SDN will permit the business apps to influence the network (whether that is automated or not is an interesting side conversation). To bring this to life there has to be a focus on policy abstraction. This is why Congress (part of OpenStack) and OpenDaylight are potentially powerful. If we can agree on policy abstraction, then the applications can interact with the network and Continue reading
Like “orchestration”, compliance is a frequently overloaded phrase in IT -- it means very different things to different people. Ansible is frequently used in all sorts of compliance use cases, which we’ll expand on below.
Compliance can mean checking to see if a system has “drifted” from a known state, pushing a system back into line from a different state, or making it conform with a very specific set of (often security related) standards.
I wish my life was like this dashboard where I could turn all the knobs to ten but I can't.
The post Poster: Life Dashboard appeared first on EtherealMind.
