It’s time for the Network Break! Sit back, grab a coffee, and join us for an analysis of the latest IT news, vendor moves and new product announcements. We’ll separate the signal from the noise--or at least make some noise of our own.
The post Network Break 24 appeared first on Packet Pushers Podcast and was written by Greg Ferro.
No. When compared to the operation of existing networks, SDN is much more secure.
The post Are SDN Controllers a Security Risk ? appeared first on EtherealMind.
Powerpoint doesn’t stink. Our presentation skills do. So how do we fix it?
First, you must decide: what do I want this presentation to be? We’ve all seen the brilliant TED talks about new ideas. We’ve all seen the really cool sample presentations from those online presentation sites about someone’s trip around the world. When you’re looking at those talks, though, remember this: they are selected out of millions of talks for their content, and their content fits their format. I’ve seen folks do fairly standard slideshows with Prezy. It doesn’t work. I’ve also seen people do “let me tell you about my trip” presentations with Powerpoint. Again, it doesn’t work.
So, just like network engineering, pick the right tool for the job. Since most of an engineer’s presentations aren’t going to feature exciting trips down the River of Doubt, or even up Doubtin’ Mountain, we’re probably pretty safe to stick with a fairly standard presentation package — slides, warts, and all.
Yes, it’s important to get the flow right. I once stood in for a presenter who’d lost his voice — the material was router architecture (hardware and software), so it’s a topic I know well, so I wasn’t Continue reading
In the CCIE Collaboration lab, understanding dial-peers is extremely important. Lack of knowledge in this area can yield devastating results in your lab score report since they can be found in so many different sections of the exam. We must be thoroughly prepared to tackle every aspect of this technology should we be presented with it at some point.
I recently got a great question in our forums about digit manipulation within POTS dial-peers and how they interact with translation rules and profiles. I figured that since this is such an important topic, my answer to his question bears repeating so it can reach a wider audience.
Let’s begin with the simple example of dialing the number “123” from a CUCME phone. Of course, the POTS dial-peer must be created to support the desired behavior.
When this pattern is selected, all digits will be stripped automatically since they are explicitly defined. This is due to the “automatic POTS dial-peer digit strip” feature in IOS. See below for the ISDN Q.931 debug output (no Called Party Number).
Since we are not currently sending a Called Party Number, we’ll need some way to add the digits back to the string to Continue reading
Enterprise IT supports many unprofitable applications. Microsoft Exchange, legacy databases, obsolete accounting systems, end-of-life desktop operating systems and much more. Public clouds can, and do, cancel unprofitable products. This is a brutal truth in cloud planning. Takeaways: Enterprise IT supports many applications that are unprofitable to own and maintain Executives and managers are commonly unprepared […]
The post Enterprises Have Many Unprofitable Applications, Public Clouds Do Not appeared first on EtherealMind.
In my last post on the subject of BGPSEC, I explained the basic operation of the modifications to BGP itself. In this post, I’ll begin looking at some of the properties — both good and bad — of these extensions to BGP. To being, we’ll look at the simple network illustrated here, and see what […]
The post BGPSEC: Protections Offered appeared first on Packet Pushers Podcast and was written by Russ White.
I promise engineers who renew their subscription 4-6 new webinars a year. It’s time to see whether I kept that promise in 2014.
TL&DR summary: it was a great year, but I still missed a few things.
Read more ...
Ah, finally -my camera as arrived. I ordered my Seek Thermal Camera from Amazon for iPhone back in October 2014, and due to some issues between Apple and Seek over the Hardware Certification, the shipments had been delayed. Post by Seek Thermal. Since it is here I can now show you the unboxing of the […]
The post Seek Thermal iOS appeared first on Fryguy's Blog.
Review schemes are useful for identifying good consumer products and applications. But that doesn’t mean that everything needs to prompt me to leave a review. Cisco has started prompting for reviews for IOS versions, but I’m not convinced it makes sense for network operating systems. Perhaps it will do one day when disaggregated hardware/software is the norm for network devices.
I love the 1Password password manager. It’s a well-polished app, and has been great value. Part of making my life better means not annoying me with frequent prompts for review:
1Password never prompts you for a review. We value your workflow too much to interrupt it. If you feel generous and have a couple of minutes, please leave a review. It means the world to us.
I like the Pocket app too. It prompts me to leave a review every single time it gets updated, which annoys the hell out of me. But hey, it’s free, so maybe I shouldn’t complain too much.
Pocket and 1Password are examples of consumer applications in a competitive market. The barrier to switching is relatively low, and they live and die on reviews. In a crowded market, customers rely on reviews, and the Continue reading
After installing the Mininet software-defined network simulator on a virtual machine, you may want to build the documentation. Documentation is available on the Mininet web site but, if you installed a beta version of a new development release or installed an old version, you may want to use the documentation specific for the version you are using.
Mininet documentation is built into the source code and can be generated using the doxypy program. This post details the simple steps required to install doxypy and other required software, and to build and view the documentation.
Start the Mininet virtual machine and log into it via SSH. See my previous post about setting up the Mininet SDN Network Simulator virtual machine.
On the Mininet VM, run the following command to install doxypy, and supporting software packages:
$ sudo apt-get install doxypy doxygen doxygen-latex help2man
This could take a while because it downloads over one Gigabyte of data, such as fonts.
On the Mininet VM, run the following command to build the documentation
$ cd ~/mininet
$ make doc
This builds a PDF version of the documentation named refman.pdf in the folder: ~/mininet/doc/latex/.