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Category Archives for "Networking"

Jerikan: a configuration management system for network teams

There are many resources for network automation with Ansible. Most of them only expose the first steps or limit themselves to a narrow scope. They give no clue on how to expand from that. Real network environments may be large, versatile, heterogeneous, and filled with exceptions. The lack of real-world examples for Ansible deployments, unlike Puppet and SaltStack, leads many teams to build brittle and incomplete automation solutions.

We have released under an open-source license our attempt to tackle this problem:

  • Jerikan, a tool to build configuration files from a single source of truth and Jinja2 templates, along with its integration into the GitLab CI system,
  • an Ansible playbook to deploy these configuration files on network devices, and
  • a redacted version of the configuration data and the templates for our, now defunct, datacenters in San Francisco and South Korea, covering many vendors (Facebook Wedge 100, Dell S4048 and S6010, Juniper QFX 5110, Juniper QFX 10002, Cisco ASR 9001, Cisco Catalyst 2960, Opengear console servers, and Linux), and many functionalities (provisioning, BGP-to-the-host routing, edge routing, out-of-band network, DNS configuration, integration with NetBox and IRRs).

Here is a quick demo to configure a new peering:

This work is the collective effort of Continue reading

Aruba Wi-Fi 6E access point to launch this fall

Business users looking for an upgrade to the very latest Wi-Fi standard, also known as Wi-Fi 6E, now have the option of Aruba’s new AP 635, the company announced this morning. Wi-Fi resources Test and review of 4 Wi-Fi 6 routers: Who’s the fastest? How to determine if Wi-Fi 6 is right for you Five questions to answer before deploying Wi-Fi 6 Wi-Fi 6E: When it’s coming and what it’s good for Wi-Fi 6E works much the same as Wi-Fi 6, sharing that standard’s improved ability to handle dense client environments, high throughput, and advanced multi-user and multi-antenna functionality. The new feature is the ability to use the 6GHz spectrum that the FCC opened in April 2020 to unlicensed users, representing a two-fold increase in the spectrum available for WI-Fi. That added spectrum means that Wi-Fi users can take advantage of much wider channels, leading to commensurately higher throughput.To read this article in full, please click here

Mythbusting: NFV Data Center Fabric Buffering Requirements

Every now and then I stumble upon an article or a comment explaining how Network Function Virtualization (NFV) introduces new data center fabric buffering requirements. Here’s a recent example:

For Telco/carrier Cloud environments, where NFVs (which are much slower than hardware SGW) get used a lot, latency is higher with a lot of jitter due to the nature of software and the varying link speeds, so DC-level near-zero buffer is not applicable.

It seems to me we’re dealing with another myth. Starting with the basics:

Read more …

Ampere updates server chip roadmap with focus on cloud computing

Ampere, the chip startup building Arm-based server processors and led by former Intel exec Renee James, has updated its product roadmap and announced new customers.The biggest news is that the company is designing its own custom cores for release in 2022. Ampere Altra processors are already on the market but use the Neoverse core from Arm. When it introduces the next generation Ampere built on a 5nm process next year, it will be with a homegrown core optimized around cloud workloads."If you go back to the objectives we had, which were delivering predictable, high performance, scalability and power efficiency, we really need to develop our own cores ... to be able to actually focus in on the exact way that the cloud wants single-threaded performance," Jeff Wittich, chief product officer for Ampere, told Network World.To read this article in full, please click here

Ampere updates server chip roadmap with focus on cloud computing

Ampere, the chip startup building Arm-based server processors and led by former Intel exec Renee James, has updated its product roadmap and announced new customers.The biggest news is that the company is designing its own custom cores for release in 2022. Ampere Altra processors are already on the market but use the Neoverse core from Arm. When it introduces the next generation Ampere built on a 5nm process next year, it will be with a homegrown core optimized around cloud workloads."If you go back to the objectives we had, which were delivering predictable, high performance, scalability and power efficiency, we really need to develop our own cores ... to be able to actually focus in on the exact way that the cloud wants single-threaded performance," Jeff Wittich, chief product officer for Ampere, told Network World.To read this article in full, please click here

Ampere points server chip roadmap toward cloud computing

Ampere, the chip startup building Arm-based server processors and led by former Intel exec Renee James, has updated its product roadmap and announced new customers.The biggest news is that the company is designing its own custom cores for release in 2022. Ampere Altra processors are already on the market but use the Neoverse core from Arm. When it introduces the next generation Ampere built on a 5nm process next year, it will be with a homegrown core optimized around cloud workloads."If you go back to the objectives we had, which were delivering predictable, high performance, scalability and power efficiency, we really need to develop our own cores ... to be able to actually focus in on the exact way that the cloud wants single-threaded performance," Jeff Wittich, chief product officer for Ampere, told Network World.To read this article in full, please click here

Ampere points server chip roadmap toward cloud computing

Ampere, the chip startup building Arm-based server processors and led by former Intel exec Renee James, has updated its product roadmap and announced new customers.The biggest news is that the company is designing its own custom cores for release in 2022. Ampere Altra processors are already on the market but use the Neoverse core from Arm. When it introduces the next generation Ampere built on a 5nm process next year, it will be with a homegrown core optimized around cloud workloads."If you go back to the objectives we had, which were delivering predictable, high performance, scalability and power efficiency, we really need to develop our own cores ... to be able to actually focus in on the exact way that the cloud wants single-threaded performance," Jeff Wittich, chief product officer for Ampere, told Network World.To read this article in full, please click here

Containerising NVIDIA Cumulus Linux

In one of his recent posts, Ivan raises a question: “I can’t grasp why Cumulus releases a Vagrant box, but not a Docker container”. Coincidentally, only a few weeks before that I had managed to create a Cumulus Linux container image. Since then, I’ve done a lot of testing and discovered limitations of the pure containerised approach and how to overcome them while still retaining the container user experience. This post is a documentation of my journey from the early days of running Cumulus on Docker to the integration with containerlab and, finally, running Cumulus in microVMs backed by AWS’s Firecracker and Weavework’s Ignite.

Innovation Trigger

One of the main reason for running containerised infrastructure is the famous Docker UX. Containers existed for a very long time but they only became mainstream when docker released their container engine. The simplicity of a typical docker workflow (build, ship, run) made it accessible to a large number of not-so-technical users and was the key to its popularity.

Virtualised infrastructure, including networking operating systems, has mainly been distributed in a VM form-factor, retaining much of the look and feel of the real hardware for the software processes running on top. However it Continue reading

Viewing compressed file content on Linux without uncompressing

If you need to check the contents of a compressed text file on Linux, you don't have to uncompress it first. Instead, you can use a zcat or bzcat command to extract and display file contents while leaving the file intact. The "cat" in each command name tells you that the command's purpose is to display content. The "z" tells you that it works with compressed files.Which of the two commands to use depends on the type of compressed file you are examining. If the file was compressed with gzip or zip, you would use the zcat command. If the file was compressed with bzip2, you would use the bzcat command. On some systems, zcat might be called gzcat.To read this article in full, please click here

Viewing compressed file content on Linux without uncompressing

If you need to check the contents of a compressed text file on Linux, you don't have to uncompress it first. Instead, you can use a zcat or bzcat command to extract and display file contents while leaving the file intact. The "cat" in each command name tells you that the command's purpose is to display content. The "z" tells you that it works with compressed files.Which of the two commands to use depends on the type of compressed file you are examining. If the file was compressed with gzip or zip, you would use the zcat command. If the file was compressed with bzip2, you would use the bzcat command. On some systems, zcat might be called gzcat.To read this article in full, please click here

Network Break 334: Palo Alto Unveils New Security Gear; Arista Saves Time With Lowest-Latency Switch

This week's Network Break covers new firewalls & other security products from Palo Alto Networks, discusses Arista's lowest-latency switch (now with EOS), reviews financial results from Cisco and Palo Alto, and explains why Microsoft is making Internet Explorer go away (just not entirely).

The post Network Break 334: Palo Alto Unveils New Security Gear; Arista Saves Time With Lowest-Latency Switch appeared first on Packet Pushers.

Is it really the best just because its the most common?

I cannot count the number of times I’ve heard someone ask these two questions—

  • What are other people doing?
  • What is the best common practice?

While these questions have always bothered me, I could never really put my finger on why. I ran across a journal article recently that helped me understand a bit better. The root of the problem is this—what does best common mean, and how can following the best common produce a set of actions you can be confident will solve your problem?

Bellman and Oorschot say best common practice can mean this is widely implemented. The thinking seems to run something like this: the crowd’s collective wisdom will probably be better than my thinking… more sets of eyes will make for wiser or better decisions. Anyone who has studied the madness of crowds will immediately recognize the folly of this kind of state. Just because a lot of people agree it’s a good idea to jump off a cliff does not mean it is, in fact, a good idea to jump off a cliff.

Perhaps it means something closer to this is no worse than our competitors. If that’s the meaning, though, it’s a pretty cynical Continue reading

Tech Bytes: Nokia’s Fabric Services System Simplifies Data Center Operations (Sponsored)

Today's Tech Byte explores a digital sandbox for fabric emulation. This unique feature is part of Nokia's Fabric Services System for automating and operating a data center fabric. Our Nokia guest is Phani Koganti, Senior Director of Product Management. This is a sponsored episode.

The post Tech Bytes: Nokia’s Fabric Services System Simplifies Data Center Operations (Sponsored) appeared first on Packet Pushers.

The Week in Internet News: Rural Areas Need Broadband to Attract Workers

Recruiting issue: Companies in some areas of the rural U.S. are trying to hire workers, but the lack of quality broadband service is hurting their efforts, the New York Times reports. The story looks at a manufacturer of asphalt paving equipment in rural Iowa that paid to have fiber laid to its factory, but there’s […]

The post The Week in Internet News: Rural Areas Need Broadband to Attract Workers appeared first on Internet Society.

The State of Data Center Networking 2021: Long Live Private Cloud

Today Pluribus announced the release of the State of the Data Center Networking 2021 Annual Report. This groundbreaking original research, conducted with Enterprise Management Associates (EMA), not only confirms many of the trends we have discussed recently, it reveals just how strong they are.

The post The State of Data Center Networking 2021: Long Live Private Cloud appeared first on Pluribus Networks.

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