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Category Archives for "Networking"

Do We Still Need OSPF Areas and Summarization?

One of my ExpertExpress design discussions focused on WAN network design and the need for OSPF areas and summarization (the customer had random addressing and the engineers wondered whether it makes sense to renumber the network to get better summarization).

I was struggling with the question of whether we still need OSPF areas and summarization in 2016 for a long time. Here are my thoughts on the topic; please share yours in the comments.

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Hashiru Aminu CCDE Exam Success Story and Recommendations

I took the coveted CCDE  Practical Exams on 31st of August, and Thankfully I passed (My CCDE Number is 2016::14), this is my third attempt, the journey started in 2011, Gone through a lot of studies, Boot camps, Ciscolive Sessions, CCDE Mock Lab in Ciscolive, Mentorship from existing CCDEs. My First attempt was in 2014 […]

The post Hashiru Aminu CCDE Exam Success Story and Recommendations appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

New products of the week 9.5.16

New products of the weekOur roundup of intriguing new products. Read how to submit an entry to Network World's products of the week slideshow.SonyTM R10C on Site ScanKey features: Sony R10C on Site Scan is an all-in-one enterprise drone solution that delivers users in the construction, engineering and mining industries the most advanced commercial-grade camera available on the market. More info.To read this article in full or to leave a comment, please click here

After 4 days, Gabon is getting back on the Internet

On September 1, we reported that we had seen a complete shutdown of Internet access to CloudFlare sites from Gabon.

This morning, Internet connectivity in Gabon appears to have been at least partially restored starting at around 0500 UTC. Some news reports indicate that Internet access has been restored in the capital but that access to social media sites is still restricted.

We will continue to monitor the situation to see if traffic from Gabon return to its normal levels and update this blog post.

1st Attempt – No Dice

So I just got back from my first attempt at the CCDE practical, and unfortunally I didnt pass it.
It was a very different exam than the CCIE and it takes a little while to become used to the interface and exam style.

I started my journey to London on the 30th of August and right off the bat it started out badly with me getting an eye infection in one eye. By the end of the day it had spread to my other eye. Not really what you want or need going into an exam which is heavy on the reading part.

However, it was awesome meeting some of my study buddies from our Slack group! We had a great meal and a few good beers! – Time to call it a night.

The exam has been documented elsewhere, so i wont spend much time on it here. Suffice it to say its a difficult beast ?

I only used 5.5 hours of my 9 hour slot, and i just wanted to get out of there and rest my eyes to be honest.

I departed London September 1st and im now back at work. Much the wiser however.

I Continue reading

How to watch iPhone 7 reveal on Apple, Windows or Android

If you've got 2 hours to spare on Wednesday, Sept. 7 at 1PM EST, here's how to catch the live stream of the Tim Cook & Co., show revealing what's expected to be the iPhone 7, possibly a new Apple Watch and the latest on iOS 10. That is, if you haven't been invited to attend the event in person at the Bill Graham Civic Auditorium in San Francisco. Apple makes it easiest to watch its antics and revelations online if you're using an Apple device, whether it be an iPhone, iPad, iPod touch or Mac, though Apple also acknowledges the existence of Windows 10 users: Requirements: Live streaming uses Apple’s HTTP Live Streaming (HLS) technology. HLS requires an iPhone, iPad, or iPod touch with Safari on iOS 7.0 or later, a Mac with Safari 6.0.5 or later on OS X v10.8.5 or later, or a PC with Microsoft Edge on Windows 10. Streaming via Apple TV requires an Apple TV (2nd or 3rd generation) with software 6.2 or later or an Apple TV (4th generation).To read this article in full or to leave a comment, please click here

What to do when Verizon won’t close your email account

Way back, in the mists of time, when we were all much younger and  the world was a brighter, happier place — almost a year ago — I published a piece on Verizon’s impressively terrible e-mail service: Why Verizon's email service sucks and what to do about it. But wait! There’s more making it even suckier! Reader “D C”, commenting on the post a few days after publishing, noted that: Verizon also blocks POP access from outside the US.  So while I'm traveling, I'm not able to get my personal email.  They disclose this nowhere on their site, nor do most of their support people seem to understand this policy.  Pretty absurd.To read this article in full or to leave a comment, please click here

OurMine hacked Variety, power-spammed subscribers

Two different hacking groups, both which claim to be of the non-malicious variety, have been busy bringing suspended Twitter accounts back from the dead and power-spamming Variety subscribers.OurMine hacked Variety, power-spammed subscribersIf folks who like news about Hollywood hadn’t heard of the hacking group OurMine, then some of them are very familiar with the group’s name now.OurMine reportedly compromised Variety’s content management system around 9 am PT on Saturday and published a post which Engadget said was later removed, but the hacking collective’s antics didn’t stop there. Variety’s subscribers were hammered with spam.To read this article in full or to leave a comment, please click here

OurMine hacked Variety, power-spammed subscribers

Two different hacking groups, both which claim to be of the non-malicious variety, have been busy bringing suspended Twitter accounts back from the dead and power-spamming Variety subscribers.OurMine hacked Variety, power-spammed subscribersIf folks who like news about Hollywood hadn’t heard of the hacking group OurMine, then some of them are very familiar with the group’s name now.OurMine reportedly compromised Variety’s content management system around 9 am PT on Saturday and published a post which Engadget said was later removed, but the hacking collective’s antics didn’t stop there. Variety’s subscribers were hammered with spam.To read this article in full or to leave a comment, please click here

Building a Raspberry Pi-powered Barkometer, Part 2

In the first part of this project I discussed the goal, to wit, to document and quantify how often my dog barks, and discussed the hardware I planned to use. One component I neglected to mention was the Edimax N150 Wi-Fi Nano USB Adapter which, after some experimentation, I discovered was a problem when the USB sound card was in an adjacent USB port because every sound sample I captured started with a burst of noise lasting 30 to 75 seconds.To read this article in full or to leave a comment, please click here

IBM’s Watson looks for a role in the home

Not content with helping cure cancers and winning Jeopardy, Watson wants to get inside our heads and our homes, whispering instructions into our wireless headsets and helping us do our laundry.That's the message from IBM's global head of Watson IoT, Harriet Green, in a keynote speech here at IFA in Berlin.IBM will work with appliance maker Whirlpool, TV and camera company Panasonic, wireless headphone designer Bragi and Withings owner Nokia to add Watson's cognitive computing capabilities to their products, the company said.Those cognitive capabilities could help devices talk with one another, or with us.For example, a washing machine could tell a dryer what program to use for the clothes it has just washed, or tell its owner when to order more detergent. Computer vision techniques could help security cameras distinguish between friends and strangers or identify suspicious activity. And natural language processing and text-to-speech capabilities could let wireless headphones translate for us or read us instruction manuals when our hands are full.To read this article in full or to leave a comment, please click here

Sony previews prototype Xperia gadgets

Sony is looking at taking the Xperia brand beyond smartphones and is showing off some prototype gadgets at the IFA trade show in Berlin. It was keen to underline that not all of them might make it to manufacturing, but those on display were fully working prototypes with hardware and software stable enough that the company let a reporter test them out.Xperia Projector Magdalena Petrova Sony's Xperia Projector on show at IFA in Berlin on September 1, 2016.To read this article in full or to leave a comment, please click here

Sam Labs shows off a new educational electronics kit — with no wires

Perhaps you're old enough to remember when building interactive electronic devices involved breadboards, soldering irons and assembly code.Tell young people today that, though, and they won't believe you -- especially if they've used one of the educational electronics sets Sam Labs is showing at IFA in Berlin.The components in these sets are the same as you would find in beginners' electronics kits of the 1970s and 80s: lamps, photo sensors, pushbuttons, potentiometers, tilt switches and DC motors.The big difference is, there are no wires.Instead, the components are mounted on small plastic blocks each containing a USB-rechargeable battery and a Bluetooth module. This lets them talk to one another and to a host PC, phone or tablet running Sam Labs' visual programming app.To read this article in full or to leave a comment, please click here

25 is the New 10

I am continually amazed at the productivity of the Cumulus Networks development team who recently collaborated with the Mellanox development team to do some amazing things in this new Cumulus Linux 3.1 release. Besides innovating on a number of important new software features, they added support for five new switches from Mellanox, including the first native 25 Gigabit Open Ethernet switch as well as the highest capacity 10/100GbE switch on the market.

 

Screen Shot 2016-08-22 at 7.54.46 AM

The Mellanox SN2410 is the industry’s first generally available switch with native 25 Gigabit Ethernet (25GbE) ports. Working for *the* provider of 99% of all 25GbE NICs sold worldwide, I can say with confidence that, until now, all 25GbE servers have been connected to 100GbE switch ports via breakout cables. The SN2410 changes all that by providing 48 SFP28 ports that can natively operate in 1G, 10G, or 25G modes, which is great for cutting-edge deployments while providing backward compatibility for legacy devices. Just like 10GbE SFP+ ports, the 25GbE SP28 ports can utilize inexpensive passive copper direct-attach cables.

Who needs 25 Gigabit Ethernet?

Without my naming names, you can safely assume that the hyperscalers and other early consumers of 10GbE are now moving to 25GbE Continue reading

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