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Category Archives for "Networking"

Worth Listening: Heidi Roizen

Project AI+Compassion just interviewed Heidi Roizen about compassion in IT; it’s worth listening to. From the show notes—

Storytelling is a powerful way for humans to connect and for humans to move other humans to action. To understand your story and understand the stories of others, we can develop a lot more compassion for people when we understand that everybody has a story. Everybody story is important. So, don’t dismiss other people’s stories. Take the time to get to know everyone has a story.

Sharing Failure as a Learning Model

Earlier this week there was a great tweet from my friends over at Juniper Networks about mistakes we’ve made in networking:

It got some interactions with the community, which is always nice, but it got me to thinking about how we solve problems and learn from our mistakes. I feel that we’ve reached a point where we’re learning from the things we’ve screwed up but we’re not passing it along like we used to.

Write It Down For the Future

Part of the reason why I started my blog was to capture ideas that had been floating in my head for a while. Troubleshooting steps or perhaps even ideas that I wanted to make sure I didn’t forget down the line. All of it was important to capture for the sake of posterity. After all, if you didn’t write it down did it even happen?

Along the way I found that the posts that got significant traction on my site were the ones that involved Continue reading

Heavy Networking 595: Detect, Diagnose, And Act With Opmantek’s Automated Network Management Software (Sponsored)

In today's sponsored Heavy Networking show, we talk to Opmantek about NMIS, an intelligent network management platform that spans monitoring, visibility, automation, and configuration management. Our guest is Opmantek CTO Keith Sinclair.

The post Heavy Networking 595: Detect, Diagnose, And Act With Opmantek’s Automated Network Management Software (Sponsored) appeared first on Packet Pushers.

Weekend Reads 082721


Since the start of the pandemic, Huang has delivered keynotes from his kitchen. GTC 2021 still featured a kitchen keynote, but a section featured a virtual kitchen made entirely in Omniverse. Even more impressive, the Nvidia team managed to create a CG model of Huang that delivered part of the keynote.


The U.S. is presently combating two pandemics–coronavirus and ransomware attacks. Both have partially shut down parts of the economy. However, in the case of cybersecurity, lax security measures allow hackers to have an easy way to rake in millions.


Microsoft has disclosed details of an evasive year-long social engineering campaign wherein the operators kept changing their obfuscation and encryption mechanisms every 37 days on average, including relying on Morse code, in an attempt to cover their tracks and surreptitiously harvest user credentials.


We at PowerDNS have been getting questions about ‘DNS server cache snooping remote information disclosure’ attacks lately, mostly coming from reports generated by one very popular security scanner:


Researchers have long debated whether it would be worth the effort for scammers to train machine learning algorithms that could then generate compelling phishing messages.


IBM’s Cost of a Data Breach Report 2021 analyzed 537 real breaches and Continue reading

Comcast grabs SD-WAN specialist Masergy

Comcast is certainly serious about boosting its corporate networking business. Or the cord cutters are really causing some damage. Maybe both. Either way, Comcast Business just announced plans to acquire privately-held Masergy Communications, an SD-WAN and cloud-based security specialist.Comcast is a public company, but Masergy is not, so terms of the deal were not disclosed. Masergy was acquired by private equity firm Berkshire Partners in 2016.To read this article in full, please click here

44 – The Essentials of DCNM 11

Good day everyone,

I have recorded 6 different modules aimed at giving you a good understanding of the key functions that DCNM 11 offers to manage, automate and operate your data center network.

While waiting for the new version 12 coming soon, this series of modules covers the Essentials of Data Center Network Manager  (DCNM™) version 11.

By “Essentials” the mean is that it covers the most features needed for all enterprises, from small legacy Data Center Network to multiple modern Fabrics or a mix of. This essential series of modules covering DCNM 11 emphases the Classic LAN as well as the VXLAN EVPN Fabric environments. Indeed, any network team can benefit from the advantages of leveraging the same and unique platform to operate a classic based data center network or a modern VXLAN EVPN based fabric or a mixture of the both.

I have developed the content for the lectures on DCNM 11 and 10.1(n) environment.

If you are not yet familiar with DCNM™, you can read previous posts, otherwise, DCNM is the leading Intent-Based Networking solution for Standalone NX-OS based Data Center. It encompasses the comprehensive management solution for all NX-OS network deployments Continue reading

Pin, Unpin, and why Rust needs them

Pin, Unpin, and why Rust needs them
Pin, Unpin, and why Rust needs them

Using async Rust libraries is usually easy. It's just like using normal Rust code, with a little async or .await here and there. But writing your own async libraries can be hard. The first time I tried this, I got really confused by arcane, esoteric syntax like T: ?Unpin and Pin<&mut Self>. I had never seen these types before, and I didn't understand what they were doing. Now that I understand them, I've written the explainer I wish I could have read back then. In this post, we're gonna learn

  • What Futures are
  • What self-referential types are
  • Why they were unsafe
  • How Pin/Unpin made them safe
  • Using Pin/Unpin to write tricky nested futures

What are Futures?

A few years ago, I needed to write some code which would take some async function, run it and collect some metrics about it, e.g. how long it took to resolve. I wanted to write a type TimedWrapper that would work like this:

// Some async function, e.g. polling a URL with [https://docs.rs/reqwest]
// Remember, Rust functions do nothing until you .await them, so this isn't
// actually making a HTTP request yet.
let async_fn = reqwest::get("http://adamchalmers.com");

// Wrap the  Continue reading

A closer look at two newly announced Intel chips

Our initial look at Intel’s Architecture Day focused on the new Xeons and IPU processors. Now we’ll get into the fine details, as well as look at other upcoming technologies.Sapphire Rapids Intel’s upcoming next-generation Xeon is codenamed Sapphire Rapids and promises a radical new design and gains in performance. One of its key differentiators is its modular SoC design. The chip has multiple tiles that appears to the system as a monolithic CPU and all of the tiles communicate with each other, so every thread has full access to all resources on all tiles.To read this article in full, please click here

A closer look at two newly announced Intel chips

Our initial look at Intel’s Architecture Day focused on the new Xeons and IPU processors. Now we’ll get into the fine details, as well as look at other upcoming technologies.Sapphire Rapids Intel’s upcoming next-generation Xeon is codenamed Sapphire Rapids and promises a radical new design and gains in performance. One of its key differentiators is its modular SoC design. The chip has multiple tiles that appears to the system as a monolithic CPU and all of the tiles communicate with each other, so every thread has full access to all resources on all tiles.To read this article in full, please click here

Tech Bytes: DDOS and State Exhaustion With NETSCOUT – Updated

Its not widely that DDOS attacks also cause damage from state exhaustion in devices. A recent study why Netscout surprised me that many engineers are aware of overload bandwidth or routing devices but give less considerations to state exhaustion in application aware devices. 

The post Tech Bytes: DDOS and State Exhaustion With NETSCOUT – Updated appeared first on Packet Pushers.

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