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Category Archives for "Networking"

Google SRE: Site Reliability Engineering at a Global Scale

When DevOps was coined around 2009, its purpose was to break down silos between development and IT operations. DevOps has since become a game of tug-of-war between the reliability needs of the operations team and the velocity goals on the developer side. Site reliably engineering became that balancer. As Benjamin Treynor Sloss, designer of Google’s SRE program, puts it: “SRE is what happens when you ask a software engineer to design and run operations.” The SRE team has emerged as the answer to how you can build systems at scale, striking that balance between velocity, maintainability and efficiency. It was only logical that this year’s books on site reliability engineering. Of course, almost everyone outside of Google will probably not work on anything at this scale, but, because increasingly distributed systems are constantly integrating with others, Continue reading

Tunnel: Cloudflare’s Newest Homeowner

Tunnel: Cloudflare’s Newest Homeowner

Cloudflare Tunnel connects your infrastructure to Cloudflare. Your team runs a lightweight connector in your environment, cloudflared, and services can reach Cloudflare and your audience through an outbound-only connection without the need for opening up holes in your firewall.

Tunnel: Cloudflare’s Newest Homeowner

Whether the services are internal apps protected with Zero Trust policies, websites running in Kubernetes clusters in a public cloud environment, or a hobbyist project on a Raspberry Pi — Cloudflare Tunnel provides a stable, secure, and highly performant way to serve traffic.

Starting today, with our new UI in the Cloudflare for Teams Dashboard, users who deploy and manage Cloudflare Tunnel at scale now have easier visibility into their tunnels’ status, routes, uptime, connectors, cloudflared version, and much more. On the Teams Dashboard you will also find an interactive guide that walks you through setting up your first tunnel.  

Getting Started with Tunnel

Tunnel: Cloudflare’s Newest Homeowner

We wanted to start by making the tunnel onboarding process more transparent for users. We understand that not all users are intimately familiar with the command line nor are they deploying tunnel in an environment or OS they’re most comfortable with. To alleviate that burden, we designed a comprehensive onboarding guide with pathways for MacOS, Continue reading

Intel’s 2nd-gen neuromorphic chip is 10x smarter than the first

Four years after Intel first introduced Loihi, the company’s first neuromorphic chip, the company has released its second generation processor, which Intel says will provide faster processing, greater resource density, and improved power efficiency.CPUs are often called the brains of the computer but aren’t, really, since they process only a handful of tasks at once in a serial manner, nothing like what the brain does automatically to keep you alive. Neuromorphic computing attempts to replicate the functions of the brain by performing numerous tasks simultaneously, with emphasis on perception and decision makingChip shortage will hit hardware buyers for months to years Neuromorphic chips mimic neurological functions through computational “neurons” that communicate with one another. The first generation of Loihi chips had around 128,000 of those digital neurons; the Loihi 2 has more than a million.To read this article in full, please click here

Sweet-spot spectrum for enterprise 5G is growing, but slowly

A new auction for enormously valuable mid-band spectrum and a rollback of availability for a different piece of it illustrates the uneven progress of 5G rollouts in the U.S. and represents a challenge for enterprises looking to take advantage of 5G technology. 5G resources What is 5G? Fast wireless technology for enterprises and phones How 5G frequency affects range and speed Private 5G can solve some problems that Wi-Fi can’t Private 5G keeps Whirlpool driverless vehicles rolling 5G can make for cost-effective private backhaul CBRS can bring private 5G to enterprises The mid-band is valuable because it’s in a “Goldilocks” zone of the wireless spectrum—its frequencies are high enough to support higher throughput, while also being low enough to propagate effectively across relatively large areas.To read this article in full, please click here

Mid-band spectrum for 5G growing, with fits and starts

A new auction for enormously valuable mid-band spectrum and a rollback of availability for a different piece of it illustrates the uneven progress of 5G rollouts in the U.S. and represents a challenge for enterprises looking to take advantage of 5G technology. 5G resources What is 5G? Fast wireless technology for enterprises and phones How 5G frequency affects range and speed Private 5G can solve some problems that Wi-Fi can’t Private 5G keeps Whirlpool driverless vehicles rolling 5G can make for cost-effective private backhaul CBRS can bring private 5G to enterprises The mid-band is valuable because it’s in a “Goldilocks” zone of the wireless spectrum—its frequencies are high enough to support higher throughput, while also being low enough to propagate effectively across relatively large areas.To read this article in full, please click here

Intel’s second-generation neuromorphic chip is 10x smarter than the first

Four years after Intel first introduced Loihi, the company’s first neuromorphic chip, the company has released its second generation processor, which Intel says will provide faster processing, greater resource density, and improved power efficiency.CPUs are often called the brains of the computer but aren’t, really, since they process only a handful of tasks at once in a serial manner, nothing like what the brain does automatically to keep you alive. Neuromorphic computing attempts to replicate the functions of the brain by performing numerous tasks simultaneously, with emphasis on perception and decision makingChip shortage will hit hardware buyers for months to years Neuromorphic chips mimic neurological functions through computational “neurons” that communicate with one another. The first generation of Loihi chips had around 128,000 of those digital neurons; the Loihi 2 has more than a million.To read this article in full, please click here

5G base stations could be powered by lasers

Laser-powered 5G base stations could become an operational reality in a few years using technology from Seattle-based PowerLight Technologies. 5G resources What is 5G? Fast wireless technology for enterprises and phones How 5G frequency affects range and speed Private 5G can solve some problems that Wi-Fi can’t Private 5G keeps Whirlpool driverless vehicles rolling 5G can make for cost-effective private backhaul CBRS can bring private 5G to enterprises In trials, PowerLight’s system transmitted “hundreds of watts over hundreds of meters through the air” to power up a 5G cellular base station, according to Ericsson, which ran the demo in cooperation with PowerLight using an Ericsson Streetmacro 6701 base station. (It consumes a maximum of 300W.)To read this article in full, please click here

netsim-tools: Start a Virtual Lab with a Single Command

In mid-October I finally found time to add the icing to the netsim-tools cake: netlab up command takes a lab topology and does everything needed to have a running virtual lab:

  • Create Vagrantfile or containerlab topology file
  • Create Ansible inventory
  • Start the lab with vagrant up or containerlab deploy
  • Deploy device configurations, from LLDP and interface addressing to routing protocols and Segment Routing
Read more …

Start a Virtual Lab with a Single Command

In mid-October I finally found time to add the icing to the netlab cake: netlab up command takes a lab topology and does everything needed to have a running virtual lab:

  • Create Vagrantfile or containerlab topology file
  • Create Ansible inventory
  • Start the lab with vagrant up or containerlab deploy
  • Deploy device configurations, from LLDP and interface addressing to routing protocols and Segment Routing
Read more …

Glossary of networking terms

5G 5G is fast cellular wireless technology for enterprise IoT, IIoT, and phones that can boost wireless throughput by a factor of 10. Network slicing Network slicing can make efficient use of carriers’ wireless capacity to enable 5G virtual networks that exactly fit customer needs.To read this article in full, please click here

Weekend Reads 101521


Russia is the source of the lion’s share of nation-state cyberattacks Microsoft has observed in the past year (58%), followed by North Korea (23%), Iran (11%), China (8%), and South Korea, Vietnam, and Turkey all with less than 1% representation, a new pool of data reveals.


Equinix has been testing the use of liquid cooling in its data centers, and hopes to use the technology in its Equinix Metal service to create a high-density, energy efficient computing platform.


As a rule, the English term “computer” and the equivalent German term “Rechner” describe calculating machines. But until the middle of the 20th century, computers were, in fact, humans who performed calculations.


The job-killing robots are almost at the door, we are told, mere moments away from replacing the last traces of human inefficiency and heralding the dawn of a world without work.


The technological breakthroughs and intelligence superiority of the Israel Defense Force’s Unit 8200 position it, and Israel, as a world leader, at the same level as the United States, Russia, or China.


New PCIe 6.0 technology is in the works, and according to nonprofit electronics industry consortium PCI-SIG, it’s in the final draft stages.


Recently I was asked Continue reading

MUST READ: ARP Problems in EVPN

Decades ago there was a trick question on the CCIE exam exploring the intricate relationships between MAC and ARP table. I always understood the explanation for about 10 minutes and then I was back to I knew why that’s true, but now I lost it.

Fast forward 20 years, and we’re still seeing the same challenges, this time in EVPN networks using in-subnet proxy ARP. For more details, read the excellent ARP problems in EVPN article by Dmytro Shypovalov (I understood the problem after reading the article, and now it’s all a blur 🤷‍♂️).

MUST READ: ARP Problems in EVPN

Decades ago there was a trick question on the CCIE exam exploring the intricate relationships between MAC and ARP table. I always understood the explanation for about 10 minutes and then I was back to I knew why that’s true, but now I lost it.

Fast forward 20 years, and we’re still seeing the same challenges, this time in EVPN networks using in-subnet proxy ARP. For more details, read the excellent ARP problems in EVPN article by Dmytro Shypovalov (I understood the problem after reading the article, and now it’s all a blur 🤷‍♂️).

DNSSEC with RSA-4096 keys

The role of cryptography is to keep one step ahead of advances in computing capability. One response is to keep using the same algorithm, but extend the key lengths. Here we look at the viability of DNSSEC when we use a 4,096-bit RSA key.

Heavy Networking 602: All About SPF, DKIM, DMARC Email Security

Today on Heavy Networking, all about improving email security with SPF (Sender Policy Framework), DMARC (Domain-based Message Authentication, Reporting & Conformance), and DKIM (Domain Keys Identified Mail). Our guest is Alex Blackie. He wrote an article on Email Authenticity 101 that I thought explained these topics really well. If you're a domain manager, you should listen to this one, even if you don't route mail through your domain. You can keep the bad guys from spamming in your name!

The post Heavy Networking 602: All About SPF, DKIM, DMARC Email Security appeared first on Packet Pushers.

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