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KU039: Prepping For KubeCon North America 2023

The KubeCon excitement is catching as Michael Levan gets ready to attend for the first time. Grab a rundown of what to expect at the North American event this year as he and Kristina Devochko review sessions and provide advice on how to tackle the massive amount of content that’s on the schedule. A strong... Read more »

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Hedge 201: Roundtable

It’s time to gather round the hedge and discuss whatever Eyvonne, Tom, and Russ find interesting! In this episode we discuss business logic vulnerabilities, and how we often forget to think outside the box to understand the attack surfaces that matter. We also discuss upcoming network speed increases like Wi-Fi 7 and 800G Ethernet. Do we really need these speeds, or are we just getting caught up in a hype cycle?

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2024 network plans dogged by uncertainty, diverging strategies

It’s barely fall of 2023, but it’s already clear that CIOs aren’t particularly positive about their network plans for 2024. Of 83 I have input from, in fact, 59 say they expect “significant issues” in their network planning for next year, and 71 say that they’ll be “under more pressure” in 2024 than they were this year. Sure, CIOs have a high-pressure job, but their expectations for 2024 are worse than for any year in the past 20 years, other than during Covid. Nobody is saying it’s a “the sky is falling” crisis like the proverbial Chicken Little, but some might be hunching their shoulders just a little.It seems that in 2023, all the certainties CIOs had identified in their network planning up to now are being called into question. That isn’t limited to networking, either. In fact, 82 of 83 said their cloud spending is under review, and 78 said that their data center and software plans are also in flux. In fact, CIOs said their network pressures are due more to new issues relating to the cloud, the data center, and software overall than to any network-specific challenges. Given all of this, it’s probably not surprising Continue reading

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Survey: Observability tools can create more resilient, secure networks

IT leaders are investing in observability technologies that can help them gain greater visibility beyond internal networks and build more resilient environments, according to recent research from Splunk.Splunk, which Cisco announced it would acquire for $28 billion, surveyed 1,750 observability practitioners to gauge investment and deployment of observability products as well as commitment to observability projects within their IT environments. According to the vendor’s State of Observability 2023 report, 87% of respondents now employ specialists who work exclusively on observability projects.To read this article in full, please click here

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How to determine RTOs and RPOs for backup and recovery

When evaluating the design of your backup systems or developing a design of a new backup and recovery system, there are arguably only two metrics that matter: how fast you can recover, and how much data you will lose when you recover. If you build your design around the agreed-upon numbers for these two metrics, and then repeatedly test that you are able to meet those metrics in a recovery, you’ll be in good shape.The problem is that few people know what these metrics are for their organization. This isn’t a matter of ignorance, though. They don’t know what they are because no one ever created the metrics in the first place. And if you don’t have agreed upon metrics (also known as service levels), every recovery will be a failure because it will be judged against the unrealistic metrics in everyone’s heads. With the exception of those who are intimately familiar with the backup and disaster recovery system, most people have no idea how long recoveries actually take.To read this article in full, please click here

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How to determine RTOs and RPOs for backup and recovery

When evaluating the design of your backup systems or developing a design of a new backup and recovery system, there are arguably only two metrics that matter: how fast you can recover, and how much data you will lose when you recover. If you build your design around the agreed-upon numbers for these two metrics, and then repeatedly test that you are able to meet those metrics in a recovery, you’ll be in good shape.The problem is that few people know what these metrics are for their organization. This isn’t a matter of ignorance, though. They don’t know what they are because no one ever created the metrics in the first place. And if you don’t have agreed upon metrics (also known as service levels), every recovery will be a failure because it will be judged against the unrealistic metrics in everyone’s heads. With the exception of those who are intimately familiar with the backup and disaster recovery system, most people have no idea how long recoveries actually take.To read this article in full, please click here

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UK to house three new supercomputers by 2025

The UK government has revealed technical and funding details for what will be one of the world’s fastest AI supercomputers, to be housed at the University of Bristol — and one of three new supercomputers slated to go online in the country over the next few years.Dubbed Isambard-AI, the new machine, first announced in September, will be built with HPE’s Cray EX supercomputers and powered by 5,448 NVIDIA GH200 Grace Hopper Superchips. The chips, which were launched by Nivida earlier this year, provide three times as much memory as the chipmaker’s current edge AI GPU, the H100, and 21 exaflops of AI performance.  To read this article in full, please click here

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UK to house three new supercomputers by 2025

The UK government has revealed technical and funding details for what will be one of the world’s fastest AI supercomputers, to be housed at the University of Bristol — and one of three new supercomputers slated to go online in the country over the next few years.Dubbed Isambard-AI, the new machine, first announced in September, will be built with HPE’s Cray EX supercomputers and powered by 5,448 NVIDIA GH200 Grace Hopper Superchips. The chips, which were launched by Nivida earlier this year, provide three times as much memory as the chipmaker’s current edge AI GPU, the H100, and 21 exaflops of AI performance.  To read this article in full, please click here

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How to calculate factorials in Linux

In this video transcript, Sandra Henry-Stocker discusses how to calculate factorials on a Linux system. She explains that factorials are the multiplication of numbers starting with a specified number and decreasing incrementally until reaching 1. To calculate factorials on Linux, you can use commands like "seq" and "bc." The "seq" command is used to generate a list of sequential numbers, and the "bc" command is used to perform the factorial calculations.

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IPv6 Buzz 138: Making Sense Of DHCPv6 Prefix Delegation (DHCPv6-PD)

DHCPv6 Prefix Delegation (DHCPv6-PD) is an IETF RFC that lets a router delegate a long-lived prefix, using DHCP, to a requesting router. The hosts discuss how this is used today both by service providers and in the enterprise, and potential impacts on address allocation and planning.

The post IPv6 Buzz 138: Making Sense Of DHCPv6 Prefix Delegation (DHCPv6-PD) appeared first on Packet Pushers.

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IPB138: Making Sense Of DHCPv6 Prefix Delegation (DHCPv6-PD)

DHCPv6 Prefix Delegation (DHCPv6-PD) is an IETF RFC that lets one router delegate a long-lived prefix, using DHCP, to a requesting router. What’s the need for this? As the RFC notes, some applications expect stable addresses. It also notes: It is appropriate for situations in which the delegating router does not have knowledge about the... Read more »

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BGP Labs: Build a Transit Network with IBGP

Last time we built a network with two adjacent BGP routers. Now let’s see what happens when we add a core router between them:

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BGP Labs: Build a Transit Network with IBGP

Last time we built a network with two adjacent BGP routers. Now let’s see what happens when we add a core router between them:

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Using the Linux compgen bash builtin

Linux’s compgen command is not actually a Linux command. In other words, it’s not implemented as an executable file, but is instead a bash builtin. That means that it’s part of the bash executable. So, if you were to type “which compgen”, your shell would run through all of the locations included in your $PATH variable, but it just wouldn’t find it.$ which compgen /usr/bin/which: no compgen in (.:/home/shs/.local/bin:/home/shs/bin:/usr/local/bin: /usr/bin:/usr/local/sbin:/usr/sbin) Obviously, the which command had no luck in finding it.If, on the other hand, you type “man compgen”, you’ll end up looking at the man page for the bash shell. From that man page, you can scroll down to this explanation if you’re patient enough to look for it.To read this article in full, please click here

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Using the Linux compgen bash builtin

Linux’s compgen command is not actually a Linux command. In other words, it’s not implemented as an executable file, but is instead a bash builtin. That means that it’s part of the bash executable. So, if you were to type “which compgen”, your shell would run through all of the locations included in your $PATH variable, but it just wouldn’t find it.$ which compgen /usr/bin/which: no compgen in (.:/home/shs/.local/bin:/home/shs/bin:/usr/local/bin: /usr/bin:/usr/local/sbin:/usr/sbin) Obviously, the which command had no luck in finding it.If, on the other hand, you type “man compgen”, you’ll end up looking at the man page for the bash shell. From that man page, you can scroll down to this explanation if you’re patient enough to look for it.To read this article in full, please click here

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Splunk cuts 7% of workforce ahead of Cisco acquisition

Network management and visualization vendor Splunk, which is set to be acquired by Cisco in a $28 billion deal, will cut about 560 jobs in a global restructuring, the company announced Wednesday in an SEC filing.Splunk president and CEO Gary Steele said in the filing that employees in the Americas set to lose their jobs will be notified throughout today, and that the company plans to offer severance packages to laid-off employees, as well as healthcare coverage and job placement assistance for an undisclosed length of time.To read this article in full, please click here

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Splunk cuts 7% of workforce ahead of Cisco acquisition

Network management and visualization vendor Splunk, which is set to be acquired by Cisco in a $28 billion deal, will cut about 560 jobs in a global restructuring, the company announced Wednesday in an SEC filing.Splunk president and CEO Gary Steele said in the filing that employees in the Americas set to lose their jobs will be notified throughout today, and that the company plans to offer severance packages to laid-off employees, as well as healthcare coverage and job placement assistance for an undisclosed length of time.To read this article in full, please click here

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Cloudflare incident on October 30, 2023

Multiple Cloudflare services were unavailable for 37 minutes on October 30, 2023. This was due to the misconfiguration of a deployment tool used by Workers KV. This was a frustrating incident, made more difficult by Cloudflare’s reliance on our own suite of products. We are deeply sorry for the impact it had on customers. What follows is a discussion of what went wrong, how the incident was resolved, and the work we are undertaking to ensure it does not happen again.

Workers KV is our globally distributed key-value store. It is used by both customers and Cloudflare teams alike to manage configuration data, routing lookups, static asset bundles, authentication tokens, and other data that needs low-latency access.

During this incident, KV returned what it believed was a valid HTTP 401 (Unauthorized) status code instead of the requested key-value pair(s) due to a bug in a new deployment tool used by KV.

These errors manifested differently for each product depending on how KV is used by each service, with their impact detailed below.

What was impacted

A number of Cloudflare services depend on Workers KV for distributing configuration, routing information, static asset serving, and authentication state globally. These services instead received Continue reading

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D2C218: What’s Inside The AI Magic Box?

AI and machine learning are being more widely used in IT and elsewhere. Today's episode opens the AI magic box to better understand what's inside, including software and hardware. We discuss essentials such as training models and parameters, software components, GPUs, networking, and storage. We also discuss using cloud-based AI platforms vs. building your own in-house, and what to consider when assembling your own AI infrastructure.

The post D2C218: What’s Inside The AI Magic Box? appeared first on Packet Pushers.

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D2C218: What’s Inside The AI Magic Box?

AI and machine learning are being more widely used in IT and elsewhere. Today's episode opens the AI magic box to better understand what's inside, including software and hardware. We discuss essentials such as training models and parameters, software components, GPUs, networking, and storage. We also discuss using cloud-based AI platforms vs. building your own in-house, and what to consider when assembling your own AI infrastructure.