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MLAG Deep Dive: System Overview

Multi-Chassis Link Aggregation (MLAG) – the ability to terminate a Port Channel/Link Aggregation Group on multiple switches – is one of the more convoluted1 bridging technologies2. After all, it’s not trivial to persuade two boxes to behave like one and handle the myriad corner cases correctly.

In this series of deep dive blog posts, we’ll explore the intricacies of MLAG, starting with the data plane considerations and the control plane requirements resulting from the data plane quirks. If you wonder why we need all that complexity, remember that Ethernet networks still try to emulate the ancient thick yellow cable that could lose some packets but could never reorder packets or deliver duplicate packets.

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Juniper vMX on GNS3

Juniper Network has several products tha can be run on virtualization (hypervisor), such as KVM and ESXi. Those products include vMX (router), vSRX (firewall / security), vQFX (switch), and so on. The virtual Juniper products ease us to deploy it on lab or simulator, even on the production environment, which is run on the hypervisor. […]
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6G cellular doesn’t exist, but it can be hacked

Arriving at a consensus on when 6G wireless will be widely available commercially is all but impossible, as this small sample size shows: Northeastern University researchers: More than five years, but probably not long after Nokia CEO Pekka Lundmark: Definitely by 2030 ABI Research: Sometime in the 2030s A magic 8-ball I found in my basement: Reply hazy, try again [ Get regularly scheduled insights by signing up for Network World newsletters. ] Then there is this intriguing quatrain by 16th century French physician, astrologer and renowned seer Nostradamus:To read this article in full, please click here

6G cellular doesn’t exist, but it can be hacked

Arriving at a consensus on when 6G wireless will be widely available commercially is all but impossible, as this small sample size shows: Northeastern University researchers: More than five years, but probably not long after Nokia CEO Pekka Lundmark: Definitely by 2030 ABI Research: Sometime in the 2030s A magic 8-ball I found in my basement: Reply hazy, try again [ Get regularly scheduled insights by signing up for Network World newsletters. ] Then there is this intriguing quatrain by 16th century French physician, astrologer and renowned seer Nostradamus:To read this article in full, please click here

World’s first exascale supercompuer is the world’s fastest

The first true exascale supercomputer, Frontier, is now the fastest in the world, toppling Fugaku, which held the title for the past two years, according to the latest TOPP500 list of the best performing supercomputers.An exascale computer is one that can perform 1018 (one quintillion) floating point operations per second (1 exaFLOPS), and Frontier, installed at Oak Ridge National Laboratory in Tennessee, weighed in at 1.12 exaFLOPS.Frontier also captured the title of most energy efficient supercomputer, generating 62.68 GFLOP per watt.Frontier’s speed bumps down Fugaku at the RIKEN Center for Computational Science (R-CCS) in Kobe, Japan, from number 1 on the TOPP500 list last fall to number 2 now. Fugaku scored 442 peta FLOPS (PFLOPS) on the  High Performance Linpack (HPL) benchmark, which measures how well systems solve a dense system of linear equations.To read this article in full, please click here

World’s first exascale supercomputer is the world’s fastest

The first true exascale supercomputer, Frontier, is now the fastest in the world, toppling Fugaku, which held the title for the past two years, according to the latest TOPP500 list of the best performing supercomputers.An exascale computer is one that can perform 1018 (one quintillion) floating point operations per second (1 exaFLOPS), and Frontier, installed at Oak Ridge National Laboratory in Tennessee, weighed in at 1.12 exaFLOPS. [ Get regularly scheduled insights by signing up for Network World newsletters. ] Frontier also captured the title of most energy efficient supercomputer, generating 62.68 GFLOP per watt.To read this article in full, please click here

World’s first exascale supercompuer is the world’s fastest

The first true exascale supercomputer, Frontier, is now the fastest in the world, toppling Fugaku, which held the title for the past two years, according to the latest TOPP500 list of the best performing supercomputers.An exascale computer is one that can perform 1018 (one quintillion) floating point operations per second (1 exaFLOPS), and Frontier, installed at Oak Ridge National Laboratory in Tennessee, weighed in at 1.12 exaFLOPS.Frontier also captured the title of most energy efficient supercomputer, generating 62.68 GFLOP per watt.Frontier’s speed bumps down Fugaku at the RIKEN Center for Computational Science (R-CCS) in Kobe, Japan, from number 1 on the TOPP500 list last fall to number 2 now. Fugaku scored 442 peta FLOPS (PFLOPS) on the  High Performance Linpack (HPL) benchmark, which measures how well systems solve a dense system of linear equations.To read this article in full, please click here

World’s first exascale supercomputer is the world’s fastest

The first true exascale supercomputer, Frontier, is now the fastest in the world, toppling Fugaku, which held the title for the past two years, according to the latest TOPP500 list of the best performing supercomputers.An exascale computer is one that can perform 1018 (one quintillion) floating point operations per second (1 exaFLOPS), and Frontier, installed at Oak Ridge National Laboratory in Tennessee, weighed in at 1.12 exaFLOPS. [ Get regularly scheduled insights by signing up for Network World newsletters. ] Frontier also captured the title of most energy efficient supercomputer, generating 62.68 GFLOP per watt.To read this article in full, please click here

Easier Network Visibility Using SaaS

The following post is by Sehjung Hah at VMware. We thank VMware for being a sponsor. Catch up and listen to VMware’s latest podcast with Packet Pushers introducing vRealize Network Insight Universal with Ethan Banks and Ned Bellavance on Day 2 Cloud 145: Tech Bytes: Flexible Cloud Migration Using VMware vRealize Network Insight Universal. More details are available in […]

The post Easier Network Visibility Using SaaS appeared first on Packet Pushers.

Change an IP address from dynamic to static with a bash script

Changing the IP address of a Linux system from dynamic to static is not difficult, but requires a little care and a set of commands that you likely rarely use. This post provides a bash script that will run through the process, collect the needed information and then issue the commands required to make the changes while asking as little as possible from the person running it.The bulk of the script focusses on making sure that the correct settings are used. For example, it collects the 36-charater universally unique identifier (UUID) from the system so that you never have to type it in or copy and paste it into place. [ Get regularly scheduled insights by signing up for Network World newsletters. ]To read this article in full, please click here

Use bash to change an IP address from dynamic to static on Linux

Changing the IP address of a Linux system from dynamic to static is not difficult, but requires a little care and a set of commands that you likely rarely use. This post provides a bash script that will run through the process, collect the needed information and then issue the commands required to make the changes while asking as little as possible from the person running it.The bulk of the script focusses on making sure that the correct settings are used. For example, it collects the 36-charater universally unique identifier (UUID) from the system so that you never have to type it in or copy and paste it into place. [ Get regularly scheduled insights by signing up for Network World newsletters. ]To read this article in full, please click here

Change an IP address from dynamic to static with a bash script

Changing the IP address of a Linux system from dynamic to static is not difficult, but requires a little care and a set of commands that you likely rarely use. This post provides a bash script that will run through the process, collect the needed information and then issue the commands required to make the changes while asking as little as possible from the person running it.The bulk of the script focusses on making sure that the correct settings are used. For example, it collects the 36-charater universally unique identifier (UUID) from the system so that you never have to type it in or copy and paste it into place. [ Get regularly scheduled insights by signing up for Network World newsletters. ]To read this article in full, please click here

Use bash to change an IP address from dynamic to static on Linux

Changing the IP address of a Linux system from dynamic to static is not difficult, but requires a little care and a set of commands that you likely rarely use. This post provides a bash script that will run through the process, collect the needed information and then issue the commands required to make the changes while asking as little as possible from the person running it.The bulk of the script focusses on making sure that the correct settings are used. For example, it collects the 36-charater universally unique identifier (UUID) from the system so that you never have to type it in or copy and paste it into place. [ Get regularly scheduled insights by signing up for Network World newsletters. ]To read this article in full, please click here

Learning BGP Module 2 Lesson 5: BGP Communities – Video

Russ White’s BGP course moves on to the concept of BGP communities, including the three basic types of communities, as well as no_export and no_advertise communities. You can subscribe to the Packet Pushers’ YouTube channel for more videos as they are published. It’s a diverse a mix of content from Ethan and Greg, plus selected […]

The post Learning BGP Module 2 Lesson 5: BGP Communities – Video appeared first on Packet Pushers.

Tech Bytes: Enhancing CI/CD Pipelines With Nokia’s Digital Sandbox (Sponsored)

Today we welcome sponsor Nokia back to the Tech Bytes podcast to get more information about its Digital Sandbox, and how this software, part of Nokia’s Fabric Services System, helps enable a continuous integration/continuous delivery, or CI/CD framework, for network engineers. Our guest is Erwan James, Product Line Manager at Nokia.

The post Tech Bytes: Enhancing CI/CD Pipelines With Nokia’s Digital Sandbox (Sponsored) appeared first on Packet Pushers.

Join me at PlatformCon 2022 to learn how to secure could-native applications using open source tools

PlatformCon 2022 is just around the corner and I’m excited to be speaking at the conference alongside other platform practitioners and pioneers. My talk, Using open-source software to secure cloud-native applications, will examine—you guessed it—how to use open-source software like Kubernetes to secure cloud-native applications.

I’m looking forward to giving this talk because I think this topic is extremely relevant to the Platform Engineering community. Cloud-native microservices applications bring so many amazing advantages for many software application needs, but they also bring lots of security challenges, and if those are handled incorrectly it can be a minefield. Ephemeral workloads appear and disappear, workload network addressing is transient, and traditional firewalls can’t police the data path effectively.

Open-source orchestration solutions like Kubernetes define an application-centric component called ‘NetworkPolicy,’ but they do not implement it. In my session I’ll discuss how, with a change of tools and mindset, open-source software can help to implement security for cloud-native applications whilst still allowing the user to benefit from all the advantages. I’m excited to help people understand how to get on the right path and give them enough information to make their own informed decision on how to proceed

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