Archive

Category Archives for "Networking"

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.

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 →

IT budgets shift away from capital expenses thanks to the cloud

IT organizations are enjoying a slow but steady increase in budgets, but their capital expenses and hiring trends are essentially flat, reflecting the effect of the shift to cloud computing. That’s the takeaway from Computer Economics’ annual IT Spending and Staffing Benchmarks study for 2017/2018. The study finds that the greatest effect has been a decrease in the total amount of spending that goes toward the capital budget."Unless you are an IT equipment manufacturer, this is good news," said David Wagner, vice president of research at Computer Economics in a statement. "The cloud transition is far from over, and we're already seeing more efficient IT departments, particularly on a cost-per-user basis, which is at a new low. Business applications and network infrastructure are the top areas of new IT spending, while the data center, for the first time, is at the bottom. We take this as a sign the cloud transformation is continuing in earnest."To read this article in full or to leave a comment, please click here

IT budgets shift away from capital expenses thanks to the cloud

IT organizations are enjoying a slow but steady increase in budgets, but their capital expenses and hiring trends are essentially flat, reflecting the effect of the shift to cloud computing. That’s the takeaway from Computer Economics’ annual IT Spending and Staffing Benchmarks study for 2017/2018. The study finds that the greatest effect has been a decrease in the total amount of spending that goes toward the capital budget."Unless you are an IT equipment manufacturer, this is good news," said David Wagner, vice president of research at Computer Economics in a statement. "The cloud transition is far from over, and we're already seeing more efficient IT departments, particularly on a cost-per-user basis, which is at a new low. Business applications and network infrastructure are the top areas of new IT spending, while the data center, for the first time, is at the bottom. We take this as a sign the cloud transformation is continuing in earnest."To read this article in full or to leave a comment, please click here

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