Names, Addresses and Routes

It always helps to figure out the challenges of a problem you’re planning to solve, and to have a well-defined terminology. This blog post will mention a few challenges we might encounter while addressing various layers of the networking stack, from data-link layer and all the way up to the application layer, and introduce the concepts of names, addresses and routes.

According to Martin Fowler, one of the best quotes I found on the topic originally came from Phil Karlton:

Read more …

Wi-Fi 6E Won’t Make a Difference

It’s finally here. The vaunted day when the newest iPhone model has Wi-Fi 6E. You’d be forgiven for missing it. It wasn’t mentioned as a flagship feature in the keynote. I had to unearth it in the tech specs page linked above. The trumpets didn’t sound heralding the coming of a new paradigm shift. In fact, you’d be hard pressed to find anyone that even cares in the long run. Even the rumor mill had moved on before the iPhone 15 was even released. If this is the technological innovation we’ve all been waiting for, why does it sound like no one cares?

Newer Is Better

I might be overselling the importance of Wi-Fi 6E just a bit, but that’s because I talk to a lot of wireless engineers. More than a couple of them had said they weren’t even going to bother upgrading to the new USB-C wonder phone unless it had Wi-Fi 6E. Of course, I didn’t do a survey to find out how many of them had 6E-capable access points at home, either. I’d bet the number was 100%. I’d be willing to be the survey of people outside of that sphere looking to buy an iPhone Continue reading

AMD Finishes Out The Zen4 Server CPUs With Edgy “Siena”

Different workloads need different mixes of price, performance, thermals, and longevity in the field out there on the edge and in the datacenter, and that is why server CPU makers for years have had a mix of processors that deliver on these vectors that are different from each other. …

The post AMD Finishes Out The Zen4 Server CPUs With Edgy “Siena” first appeared on The Next Platform.

AMD Finishes Out The Zen4 Server CPUs With Edgy “Siena” was written by Timothy Prickett Morgan at The Next Platform.

VMware NSX Bare Metal Edge Performance

Every cloud environment is rooted in virtualization and is defined by three pillars: network virtualization, server virtualization, and storage virtualization. The VMware NSX Edge Node plays an essential role in virtualizing networking and security services. The throughput supported by the NSX Edge Node is critical for the entire ecosystem and network services running on it.

In this blog, we outline NSX Bare Metal Edge performance for customers implementing Bare Metal Edge for their virtual networking infrastructure.  Using NSX Bare Metal Edge (with no services running) with 4x100Gbp interfaces, RFC2544 performance tests yielded a North-South throughput of up to 388 Gbps (97%-line rate) and up to 3 Tbps for the entire cluster (when using 8 Edge Nodes), providing significant throughput for North-South traffic in the virtual network infrastructure.

Please refer to VMware NSX Bare Metal Edge Performance white paper for more information on test and settings used to achieve these results.

Key Hardware Considerations for NSX Bare Metal Edge

The choice of hardware for the NSX Bare Metal Edge is driven by bandwidth requirements and the throughput you want to achieve. Key considerations include:

  • Physical NIC: Consider the bandwidth, connectivity, and resiliency requirements for the Bare Metal Edge.
  • CPU: NSX Continue reading

Network Break 447: Cisco Chases AI Ethernet Fabrics With New Silicon One ASICs; Nokia Announces Routers With Custom Silicon

Today on Network Break we get a plethora of networking news, including Cisco rolling out new custom Ethernet switch ASICs to compete for AI fabrics. Nokia announces new routers also boasting custom silicon, Intel makes noise about the Thunderbolt 5 connector, Marvell touts ASICs for automotive Ethernet, the AfriNIC registry goes into receivership, and more tech news.

Network Break 447: Cisco Chases AI Ethernet Fabrics With New Silicon One ASICs; Nokia Announces Routers With Custom Silicon

Today on Network Break we get a plethora of networking news, including Cisco rolling out new custom Ethernet switch ASICs to compete for AI fabrics. Nokia announces new routers also boasting custom silicon, Intel makes noise about the Thunderbolt 5 connector, Marvell touts ASICs for automotive Ethernet, the AfriNIC registry goes into receivership, and more tech news.

The post Network Break 447: Cisco Chases AI Ethernet Fabrics With New Silicon One ASICs; Nokia Announces Routers With Custom Silicon appeared first on Packet Pushers.

IoT startups fill security gaps

As the volume of IoT devices connecting to enterprise networks continues to climb, the number of security threats has been increasing in lockstep. Cybersecurity threats, alongside supply chain issues, chip shortages and geopolitical instability, are a major reason that IoT growth has been slower than many analysts had predicted.Even so, the scale of the IoT security problem is great enough that 52 IoT startups raised a total of $840 million in the latest quarter, and even cautious analysts believe the IoT market will grow steadily in the coming years. In fact, research firm IDC predicts that the IoT market will expand to 55.7 billion connected IoT devices by 2025, with those devices generating 80B zettabytes (ZB) of data.To read this article in full, please click here

IoT startups fill security gaps

As the volume of IoT devices connecting to enterprise networks continues to climb, the number of security threats has been increasing in lockstep. Cybersecurity threats, alongside supply chain issues, chip shortages and geopolitical instability, are a major reason that IoT growth has been slower than many analysts had predicted.Even so, the scale of the IoT security problem is great enough that 52 IoT startups raised a total of $840 million in the latest quarter, and even cautious analysts believe the IoT market will grow steadily in the coming years. In fact, research firm IDC predicts that the IoT market will expand to 55.7 billion connected IoT devices by 2025, with those devices generating 80B zettabytes (ZB) of data.To read this article in full, please click here

IoT startups fill security gaps

As the volume of IoT devices connecting to enterprise networks continues to climb, the number of security threats has been increasing in lockstep. Cybersecurity threats, alongside supply chain issues, chip shortages and geopolitical instability, are a major reason that IoT growth has been slower than many analysts had predicted.Even so, the scale of the IoT security problem is great enough that 52 IoT startups raised a total of $840 million in the latest quarter, and even cautious analysts believe the IoT market will grow steadily in the coming years. In fact, research firm IDC predicts that the IoT market will expand to 55.7 billion connected IoT devices by 2025, with those devices generating 80B zettabytes (ZB) of data.To read this article in full, please click here

Dataplane MAC Learning with EVPN

Johannes Resch submitted the following comment to the Is Dynamic MAC Learning Better Than EVPN? blog post:

I’ve also recently noticed some vendors claiming that dataplane MAC learning is so much better because it reduces the number of BGP updates in large scale SP EVPN deployments. Apparently, some of them are working on IETF drafts to bring dataplane MAC learning “back” to EVPN. Not sure if this is really a relevant point - we know that BGP scales nicely, and its relatively easy to deploy virtualized RR with sufficient VPU resources.

While he’s absolutely correct that BGP scales nicely, the questions to ask is “what is the optimal way to deliver a Carrier Ethernet service?”

Read more …

On the ‘net: Network Models at Packet Pushers

I’ve just started a new series on network models over at Packet Pushers. The first two installments are here:

I learned the Open Systems Interconnect (OSI) model way back in the mid-1980s, as a part of my basic networking education. Ever since then, I’ve used the OSI model in my day-to-day work as a network engineer.

First, models are not sacrosanct. A model is just a tool. If the model you are using is not working for you, feel free to modify it.

On the ‘Net: The IETF at Packet Pushers

I’ve been writing a series about working within the IETF to publish a new standard over at Packet Pushers. The most recent installments are:

There are other seemingly mystical concepts in the IETF process as well—for instance, what is a “document stream,” and what is a document’s “status?”

You’re almost ready to submit a shiny new document to the IETF for consideration, right? Not quite yet—we still need to deal with mandatory sections and language.

Schedule 0923

Here’s a preview of what I’m working on for those who are interested:

  • September 2023: (this Friday) How Routers Really Work, a three-hour live webinar at Safari Books Online through Pearson
  • October 2023:
    • How the Internet Really Works a four-hour live webinar at Safari Books Online through Pearson; this is newly formatted and reorganized version of the two sessions I used to do
    • I’m speaking at a small theological conference on AI and ethics in Cary, NC
  • November 2023:
    • The new CCST book should be released
    • I have recorded a network basics video series that should be released in late 2023 or early 2024
  • January 2024:
    • What Coders Need to Know about Networks, a new course, co-authored with an engineer from Akamai; a three-hour live webinar at Safari Books Online through Pearson
    • I’ll be teaching a course in network engineering at the University of Colorado for the spring semester
  • February 2024: A new three-hour live webinar on infrastructure interviewing skills at Safari Books Online through Pearson
  • March 2024: BGP Policy, a three-hour live webinar on Safari Books Online through Pearson
  • April 2024: Troubleshooting, a reformatted and rebuilt three-hour live webinar at Safari Books Online through Pearson

There will probably Continue reading

China’s 1.5 Exaflops Supercomputer Chases Gordon Bell Prize – Again

The Association for Computing Machinery has just put out the finalists for the Gordon Bell Prize award that will be given out at the SC23 supercomputing conference in Denver, and as you might expect, some of the biggest iron assembled in the world are driving the advanced applications that have their eyes on the prize. …

The post China’s 1.5 Exaflops Supercomputer Chases Gordon Bell Prize – Again first appeared on The Next Platform.

China’s 1.5 Exaflops Supercomputer Chases Gordon Bell Prize – Again was written by Timothy Prickett Morgan at The Next Platform.

Cisco snuffs HyperFlex development, hands HCI future to Nutanix

When Cisco and Nutanix partnered in August, it raised questions about the future development of Cisco’s HyperFlex platform. The other shoe dropped this week as Cisco said it would cease development of its hyperconverged infrastructure (HCI) system.Cisco announced the end-of-sale and end-of-life dates for its HyperFlex Data Platform (HXDP); the last day to order any products related to the system is September 11, 2024, and the last day to renew to an existing subscription is February 28, 2029. Active customers will be able to continue receiving Cisco support as necessary.To read this article in full, please click here

Cisco snuffs HyperFlex development, hands HCI future to Nutanix

When Cisco and Nutanix partnered in August, it raised questions about the future development of Cisco’s HyperFlex platform. The other shoe dropped this week as Cisco said it would cease development of its hyperconverged infrastructure (HCI) system.Cisco announced the end-of-sale and end-of-life dates for its HyperFlex Data Platform (HXDP); the last day to order any products related to the system is September 11, 2024, and the last day to renew to an existing subscription is February 28, 2029. Active customers will be able to continue receiving Cisco support as necessary.To read this article in full, please click here

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