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Category Archives for "Networking"

30% off Lexar Professional USB 3.0 Dual-Slot Reader – Deal Alert

While the high-speed Professional USB 3.0 Dual-Slot Reader supports the latest high-speed CF and SD formats, it’s also backwards compatible with standard CF and SD cards, as well as USB 2.0. The Lexar Professional USB 3.0 Dual-Slot Reader has the ability to read from both card slots simultaneously, and it also allows for easy file transfer from one card to another. Leverages SuperSpeed USB 3.0 technology for high-speed file transfers, with USB interface speed up to 500MB/s. The reader averages 4.5 out of 5 stars from over 770 people on Amazon (read reviews), where the typical list price has been reduced 30% to just $24.45. See this deal on Amazon.To read this article in full or to leave a comment, please click here

Network engineering is key to meeting IoT expectations

The devil is in the details – best describes IoT. Computing will vanish says Walt Mossberg. And the public and data scientists gush with optimism at the thought of 20 billion to 50 billion connected IoT devices emitting an endless stream of data.Getting the billions of devices connected will be no small task. The thought of all the IoT applications of all that data is nothing less than seductive. Cities will self-regulate motor vehicle and public transportation saving commuters hours of travel time. Sensors will alert us and doctors when mom is not keeping to her pharmaceutical regimen.And, all these IoT devices will give context to people’s daily lives. Lights dimming or illuminating to match our mood or actions, refrigerators will warn that we have either eaten too much or not exercised enough before opening the door. Our designer glasses with integrated Microsoft Hololens technology will project the most salient context of the moment at that location.To read this article in full or to leave a comment, please click here

Mid-range models ring the changes in Top500 supercomputer ranking

With no change at the top of the latest Top500.org supercomputer list, you need to look further down the rankings to see the real story.Top500.org published the 49th edition of its twice-yearly supercomputer league table on Monday, and once again the Chinese computers 93-petaflop Sunway TaihuLight and 33.9-petaflop Tianhe 2 lead the pack.An upgrade has doubled the performance of Switzerland's GPU-based Piz Daint to 19.6 petaflops (19.6 quadrillion floating-point operations per second), boosting it from eighth to third place and nudging five other computers down a place. The top U.S. computer, Titan, is now in fourth.To read this article in full or to leave a comment, please click here

Mid-range models ring the changes in Top500 supercomputer ranking

With no change at the top of the latest Top500.org supercomputer list, you need to look further down the rankings to see the real story.Top500.org published the 49th edition of its twice-yearly supercomputer league table on Monday, and once again the Chinese computers 93-petaflop Sunway TaihuLight and 33.9-petaflop Tianhe 2 lead the pack.An upgrade has doubled the performance of Switzerland's GPU-based Piz Daint to 19.6 petaflops (19.6 quadrillion floating-point operations per second), boosting it from eighth to third place and nudging five other computers down a place. The top U.S. computer, Titan, is now in fourth.To read this article in full or to leave a comment, please click here

Mid-range supercomputers surge on the Top500 list of fastest machines

With no change at the top of the latest Top500.org supercomputer list, you need to look further down the rankings to see the real story.Top500.org published the 49th edition of its twice-yearly supercomputer league table on Monday, and once again the Chinese computers 93-petaflop Sunway TaihuLight and 33.9-petaflop Tianhe 2 lead the pack.An upgrade has doubled the performance of Switzerland's GPU-based Piz Daint to 19.6 petaflops (19.6 quadrillion floating-point operations per second), boosting it from eighth to third place and nudging five other computers down a place. The top U.S. computer, Titan, is now in fourth.To read this article in full or to leave a comment, please click here

Mid-range supercomputers surge on the Top500 list of fastest machines

With no change at the top of the latest Top500.org supercomputer list, you need to look further down the rankings to see the real story.Top500.org published the 49th edition of its twice-yearly supercomputer league table on Monday, and once again the Chinese computers 93-petaflop Sunway TaihuLight and 33.9-petaflop Tianhe 2 lead the pack.An upgrade has doubled the performance of Switzerland's GPU-based Piz Daint to 19.6 petaflops (19.6 quadrillion floating-point operations per second), boosting it from eighth to third place and nudging five other computers down a place. The top U.S. computer, Titan, is now in fourth.To read this article in full or to leave a comment, please click here

VMware NSX Achieves Common Criteria EAL 2+ Certification

VMware NSX 6.3 for vSphere has achieved Common Criteria certification at the Evaluation Assurance  Level (EAL) 2+ (view the certification report)(view the press release). This marks yet another milestone of our commitment to providing industry leading certified solutions for customers from federal departments and agencies, international governments and agencies, and other highly regulated industries and sectors. Along with FIPS, DISA-STIG, ICSA Labs firewall certification, and several other independent evaluations, the Common Criteria compliance accreditation validates NSX as a reliable network virtualization platform that satisfies stringent government security standards.

Common Criteria is an international set of guidelines (ISO-15408) that provides a methodology framework for evaluating security features and capabilities of Information Technology (IT) security products. It is mutually recognized by 26 member nations.

Regulatory compliance is one of the challenges faced by government IT departments in their efforts to modernize legacy systems, and Common Criteria is often required for procurement sales. The Common Criteria accreditation affirms that NSX for vSphere complies with the security requirements specified within the designated level and simplifies the introduction of NSX into government and highly regulated environments. NSX enables customers in the public sector to implement network Continue reading

Moving to Summer Schedule

The inevitable summer decline of visitors has started, so I'm switching (like every summer) to a lower publishing frequency. Given my current focus (here and here) expect one network automation post and one other in-depth post every week… and maybe an occasional this-is-worth-reading link.


Working in the summer office ;)

Take some time off, enjoy the vacations, and I hope to meet you in the September online course ;)

Technology Short Take #84

Welcome to Technology Short Take #84! This episode is a bit late (sorry about that!), but I figured better late than never, right? OK, bring on the links!

Networking

  • When I joined the NSX team in early 2013, a big topic at that time was overlay protocols (VXLAN, STT, etc.). Since then, that topic has mostly faded, though it still does come up from time to time. In particular, the move toward Geneve has prompted that discussion again, and Russell Bryant tackles the discussion in this post.
  • Sjors Robroek describes his nested NSX-T lab that also includes some virtualized network equipment (virtualized Arista switches). Nice!
  • Colin Lynch shares some details on his journey with VMware NSX (so far).
  • I wouldn’t take this information as gospel, but here’s a breakdown of some of the IPv6 support available in VMware NSX.

Servers/Hardware

  • Here’s an interesting article on the role that virtualization is playing in the network functions virtualization (NFV) space now that ARM hardware is growing increasingly powerful. This is a space that’s going to see some pretty major changes over the next few years, in my humble opinion.

Security

Technology Short Take #84

Welcome to Technology Short Take #84! This episode is a bit late (sorry about that!), but I figured better late than never, right? OK, bring on the links!

Networking

  • When I joined the NSX team in early 2013, a big topic at that time was overlay protocols (VXLAN, STT, etc.). Since then, that topic has mostly faded, though it still does come up from time to time. In particular, the move toward Geneve has prompted that discussion again, and Russell Bryant tackles the discussion in this post.
  • Sjors Robroek describes his nested NSX-T lab that also includes some virtualized network equipment (virtualized Arista switches). Nice!
  • Colin Lynch shares some details on his journey with VMware NSX (so far).
  • I wouldn’t take this information as gospel, but here’s a breakdown of some of the IPv6 support available in VMware NSX.

Servers/Hardware

  • Here’s an interesting article on the role that virtualization is playing in the network functions virtualization (NFV) space now that ARM hardware is growing increasingly powerful. This is a space that’s going to see some pretty major changes over the next few years, in my humble opinion.

Security

Pivoting off Hidden Cobra Indicators

On June 13th 2017, US-CERT issued a joint Technical Alert (TA17-164A) entitled Hidden Cobra – North Korea’s DDoS Botnet Infrastructure. The alert, which was the result of analytic efforts between the Department of Homeland Security (DHS) and Federal Bureau of Investigation (FBI), included a list […]

Some recommendations for the network engineers

In this post, I will share many network engineering blogs which will be very beneficial for the network engineering and for those who want to learn more about network design.     Almost everyday I receive a message through social media or via email from the connections. What should we study ? I am new […]

The post Some recommendations for the network engineers appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

What is MPLS Traffic Engineering and Why do you need MPLS-TE ?

MPLS Traffic Engineering is a mechanism that provides cost savings in an MPLS networks.   How cost saving can be achieved  ?  How traffic is steered to the paths which wouldn’t be used in normal circumstances ?  I will explain in this post.   Let’s look at below topology.     MPLS Traffic Engineering    […]

The post What is MPLS Traffic Engineering and Why do you need MPLS-TE ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Hackers attacked 4 Florida school districts, allegedly hoped to hack voting systems

We’ve heard a lot about Russians attackers attempting to hack the US election, but another hacking group also allegedly wanted to interfere with the election; they attempted to pivot from compromised school districts to state voting systems.The Miami Herald reported that MoRo, a group of hackers based in Morocco, penetrated “at least four Florida school district networks” and purportedly searched for a way “to slip into other sensitive government systems, including state voting systems.”To read this article in full or to leave a comment, please click here

Hackers attacked 4 Florida school districts, allegedly hoped to hack voting systems

We’ve heard a lot about Russians attackers attempting to hack the US election, but another hacking group also allegedly wanted to interfere with the election; they attempted to pivot from compromised school districts to state voting systems.The Miami Herald reported that MoRo, a group of hackers based in Morocco, penetrated “at least four Florida school district networks” and purportedly searched for a way “to slip into other sensitive government systems, including state voting systems.”To read this article in full or to leave a comment, please click here

Serial Pinout for APC

This is just a quick note to remind me how to make serial cables for APC power strips. This cable works between an APC AP8941 and an Opengear terminal server with Cisco-friendly (-X2 in Opengear nomenclature) pinout.


Only pins 3,4 and 6 are populated on the 8P8C end. It probably doesn't matter whether the ground pin (black) lands on pin 4 or 5 because both should be ground on the Opengear end. The yellow wire is unused.