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 ;)

Cray CTO On The Cambrian Compute Explosion

What goes around comes around. After fighting so hard to drive volume economics in the HPC arena with relatively inexpensive X86 clusters in the past twenty years, those economies of scale are running out of gas. That is why we are seeing an explosion in the diversity of compute, not just on the processor, but in adjunct computing elements that make a processor look smarter than it really is.

The desire of system architects to try everything because it is fun has to be counterbalanced by a desire to make systems that can be manufactured at a price that is …

Cray CTO On The Cambrian Compute Explosion was written by Timothy Prickett Morgan at The Next Platform.

Knights Landing Can Stand Alone—But Often Won’t

It is a time of interesting architectural shifts in the world of supercomputing but one would be hard-pressed to prove that using the mid-year list of the top 500 HPC systems in the world. We are still very much in an X86 dominated world with the relatively stable number of accelerated systems to spice the numbers, but there are big changes afoot—as we described in depth when the rankings were released this morning.

This year, the list began to lose one of its designees in the list of “accelerator/offload” architectures as the Xeon Phi moves from offload model to host …

Knights Landing Can Stand Alone—But Often Won’t was written by Nicole Hemsoth at The Next Platform.

HPC Poised For Big Changes, Top To Bottom

There is a lot of change coming down the pike in the high performance computing arena, but it has not happened as yet and that is reflected in the current Top 500 rankings of supercomputers in the world. But the June 2017 list gives us a glimpse into the future, which we think will be as diverse and contentious from an architectural standpoint as in the past.

No one architecture is winning and taking all, and many different architectures are getting a piece of the budget action. This means HPC is a healthy and vibrant ecosystem and not, like enterprise …

HPC Poised For Big Changes, Top To Bottom was written by Timothy Prickett Morgan at The Next Platform.

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

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.

Is HPE’s “Machine” the Novel Architecture to Fit Exascale Bill?

The exascale effort in the U.S. got a fresh injection with R&D funding set to course through six HPC vendors to develop scalable, reliable, and efficient architectures and components for new systems in the post-2020 timeframe.

However, this investment, coming rather late in the game for machines that need hit sustained exaflop performance in a 20-30 megawatt envelope in less than five years, raises a few questions about potential shifts in what the Department of Energy (DoE) is looking for in next-generation architectures. From changes in the exascale timeline and new focal points on “novel architectures” to solve exascale challenges, …

Is HPE’s “Machine” the Novel Architecture to Fit Exascale Bill? was written by Nicole Hemsoth at The Next Platform.

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.

Worth Reading: Not all who wander are lost

Not all who wander are lost is a favorite “Lord of the Rings” nerd-ism, and one I’ve always personally loved. Gandalf, however, never tried to learn computer programming, and also he already had a pretty sweet job in the wizardry sector. For those of us working toward that first junior web dev job, though, wandering can be a serious issue. —The New Stack

The post Worth Reading: Not all who wander are lost appeared first on rule 11 reader.

Netcracker 2017 NVF MANO Report Webinar Q&A: Service Automation is the Operational Goal of SDN/NFV

Netcracker NFV MANO Report Webinar Q&A Thanks to all who joined us for the Netcracker 2017 NVF MANO Report Webinar: Service Automation is the Operational Goal of SDN/NFV, where NEC/Netcracker discussed the full scope of functions that are needed to meet the operational goals of SDN/NFV. After the webinar, we took questions from the audience but unfortunately ran out of time before we... Read more →

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