Cisco to Buy Security Firm OpenDNS for $635M
Cisco's security obsession creates an exit for the DNS startup.
Testing Open Networking
Over the last couple of weeks, the networking industry has made some significant steps in the right direction, the open networking direction. At the Open Networking Summit (ONS), we heard some great news about the disaggregated network and how open networking is now everywhere from hyperscale to the enterprise to startups to telcos. As exciting as that is, that’s not the news I’m referring to — I’m referring to the announcement of the Open Networking Testing Consortium.
To illustrate why this is big news, I’ll give some background on how open networking has been operating for most people. Up until a few years ago, the way you purchased a bare metal switch was through select APAC sources and a wire transfer. A few weeks later, you’d receive your equipment and it was then up to you, the end user, to perform interoperability testing with your cables and optics manufacturers while on the phone with support, along with bootstrapping your OS to these boxes. Eventually you had both a CapEx and OpEx saving solution that you controlled from end to end.
Luckily for most of you, that experience has now been refined significantly Continue reading
Docker Machine 0.3.0 Deep Dive
blog post written by Nathan LeClaire, Open Source Engineer at Docker We recently released Docker Machine 0.3.0. I am a maintainer on the project, and I want to share with you some of the goodness that we have been working … ContinuedCCIE RSv5 Lab Cram Session & New CCIE RSv5 Mock Labs Now Available
INE CCIE RSv5 Lab Cram Session is now available for viewing in our All Access Pass Library. This course includes over 35 hours of new content for CCIE Routing & Switching Version 5, including both technology review sessions as well as a step-by-step walkthrough of two new CCIE RSv5 Mock Lab Exams. These new Mock Labs are available here as part of INE’s CCIE RSv5 Workbook.
This class is designed as a last minute review of technologies and strategy before taking the actual CCIE RSv5 Lab Exam. Each of the two Mock Labs covered in class are subdivided into three sections – just like the actual exam – Troubleshooting, Diagnostics, and Configuration.
Rack rentals are available for these mock labs here. Technical discussion of the labs is through our Online Community, IEOC.
Happy Labbing!
Network Break 42
Take a Network Break! Grab a coffee, a doughnut and then 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. Sponsor: Sonus Networks This week’s show was sponsored by Sonus Networks. Sonus wants […]
The post Network Break 42 appeared first on Packet Pushers.
AnsibleFest NYC Video Presentations
AnsibleFest in NYC was an amazing day filled with everything Ansible. If you missed the presentations, we've compiled them all here.
Network Break 42
Take a Network Break! Grab a coffee, a doughnut and then 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. Sponsor: Sonus Networks This week’s show was sponsored by Sonus Networks. Sonus wants […]
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The post Network Break 42 appeared first on Packet Pushers Podcast and was written by Greg Ferro.
Cisco and OpenDNS – The Name Of The Game?
This morning, Cisco announced their intent to acquire OpenDNS, a security-as-a-service (SaaS) provider based around the idea of using Domain Naming Service (DNS) as a method for preventing the spread of malware and other exploits. I’ve used the OpenDNS free offering in the past as a way to offer basic web filtering to schools without funds as well as using OpenDNS at home for speedy name resolution when my local name servers have failed me miserably.
This acquistion is curious to me. It seems to be a line of business that is totally alien to Cisco at this time. There are a couple of interesting opportunities that have arisen from the discussions around it though.
Internet of Things With Names
The first and most obivious synergy with Cisco and OpenDNS is around Internet of Things (IoT) or Internent of Everything (IoE) as Cisco has branded their offering. IoT/IoE has gotten a huge amount of attention from Cisco in the past 18 months as more and more devices come online from thermostats to appliances to light sockets. The number of formerly dumb devices that now have wireless radios and computers to send information is staggering.
All of those devices depend Continue reading
How to achieve low latency with 10Gbps Ethernet
Good morning!
In a recent blog post we explained how to tweak a simple UDP application to maximize throughput. This time we are going to optimize our UDP application for latency. Fighting with latency is a great excuse to discuss modern features of multiqueue NICs. Some of the techniques covered here are also discussed in the scaling.txt kernel document.
CC BY-SA 2.0 image by Xiaojun Deng
Our experiment will be setup up as follows:
- We will have two physical Linux hosts: the 'client' and the 'server'. They communicate with a simple UDP echo protocol.
- Client sends a small UDP frame (32 bytes of payload) and waits for the reply, measuring the round trip time (RTT). Server echoes back the packets immediately after they are received.
- Both hosts have 2GHz Xeon CPU's, with two sockets of 6 cores and Hyper Threading (HT) enabled - so 24 CPUs per host.
- The client has a Solarflare 10Gb NIC, the server has an Intel 82599 10Gb NIC. Both cards have fiber connected to a 10Gb switch.
- We're going to measure the round trip time. Since the numbers are pretty small, there is a lot of jitter when counting the averages. Instead, it Continue reading
Reading
"Reading takes a long time, though, don’t you find? It takes such a long time to get from, say, page twenty-one to page thirty. I mean, first you’ve got page twenty-three, then page twenty-five, then page twenty-seven, then page twenty-nine, not to mention the even numbers. Then page thirty. Then you’ve got page thirty-one and page thirty-three — there’s no end to it. Luckily Animal Farm isn’t that long a novel. But novels . . . they’re all long, aren’t they. I mean, they’re all so long.
" Martin Amis, Money —
Push It To The Limit! Understand Wi-Fi’s Breaking Point to Design Better WLANs
This is the fourth and final blog post in the WLAN capacity planning series. Be sure to read the first, second, and third posts.
We all want high performing WLANs. In order to do that we must push Wi-Fi to its limits!
(Cue Scarface Theme, verse 1)…
“Push it to the limit!
Walk along the perimeter edge
But don’t look up, just keep your head
And you’ll be finished
Survey to the limit!
Past the point of no bandwidth
You’ve reached the edge but still you gotta learn
How to build it
Hit the floor and double your pace
Laptop wide open like an engineer outta hell
And you crush the speed test
Going for the back of every room
Nothing gonna stop you
There’s no wall that strong
So close now, battery near the brink
So, push it!”
We walk a fine line when designing wireless networks, attempting to push as many users and bandwidth through our APs as possible, ensuring adequate capacity is available to meet demand, while not overbuilding the network. But what are the limits and how do we know we’ve hit them? Or more importantly, how do we plan Continue reading