MLAG Deep Dive: Dynamic MAC Learning

In the first blog post of the MLAG Technology Deep Dive series, we explored the components of an MLAG system and the fundamental control plane requirements.

This post focuses on a major building block of the layer-2 data plane functionality: MAC learning. We’ll keep using the same network topology with two switches and five hosts, and assume our system tries its best to implement hot-potato switching (sending the frames toward the destination MAC address on the shortest possible path).

Read more …

RSA: Cisco launches SASE, offers roadmap for other cloud-based services

Cisco made a variety of security upgrades at the RSA Conference designed to move security operation to the cloud, improve its Secure Access Service Edge offering and offer new simplified security end point control.The biggest piece of the Cisco roll out was a new overarching security platform called the Cisco Security Cloud will include unified management and policies, and offer open APIs to help grow a multivendor security ecosystem. Cisco defines the  Security Cloud as a “multi-year strategic vision for the future of security.” It is an ongoing journey that began several years ago and Cisco will continue delivering upon the key tenets of this vision with a consistent roadmap. The cloud will be made up of existing products like Umbrella and offerings from Duo, other features will be developed in the future.To read this article in full, please click here

RSA: Cisco launches SASE, offers roadmap for other cloud-based services

Cisco made a variety of security upgrades at the RSA Conference designed to move security operation to the cloud, improve its Secure Access Service Edge offering and offer new simplified security end point control.The biggest piece of the Cisco roll out was a new overarching security platform called the Cisco Security Cloud will include unified management and policies, and offer open APIs to help grow a multivendor security ecosystem. Cisco defines the  Security Cloud as a “multi-year strategic vision for the future of security.” It is an ongoing journey that began several years ago and Cisco will continue delivering upon the key tenets of this vision with a consistent roadmap. The cloud will be made up of existing products like Umbrella and offerings from Duo, other features will be developed in the future.To read this article in full, please click here

RSA: Cisco launches SASE, offers roadmap for other cloud-based services

Cisco made a variety of security upgrades at the RSA Conference designed to move security operation to the cloud, improve its Secure Access Service Edge offering and offer new simplified security end point control.The biggest piece of the Cisco roll out was a new overarching security platform called the Cisco Security Cloud will include unified management and policies, and offer open APIs to help grow a multivendor security ecosystem. Cisco defines the  Security Cloud as a “multi-year strategic vision for the future of security.” It is an ongoing journey that began several years ago and Cisco will continue delivering upon the key tenets of this vision with a consistent roadmap. The cloud will be made up of existing products like Umbrella and offerings from Duo, other features will be developed in the future.To read this article in full, please click here

Ampere trials AmpereOne server processor with customers

Ampere Computing introduced the next generation of its Arm-based server processors and said it has begun sampling the chip to select customers.Former Intel president Renee James launched Ampere in 2018, and the company so far has released two processors aimed at cloud data centers: the 80-core Ampere Altra and the 128-core Ampere Altra Max. Those processors used cores licensed from Arm Holdings. But now, with the new AmphereOne chip, Ampere has created customized versions of the Arm processor cores to better tailor them to customer needs.  Read more: The three-way race for GPU dominance in the data centerTo read this article in full, please click here

Ampere trials AmphereOne server processor with customers

Ampere Computing introduced the next generation of its Arm-based server processors and said it has begun sampling the chip to select customers.Former Intel president Renee James launched Ampere in 2018, and the company so far has released two processors aimed at cloud data centers: the 80-core Ampere Altra and the 128-core Ampere Altra Max. Those processors used cores licensed from Arm Holdings. But now, with the new AmphereOne chip, Ampere has created customized versions of the Arm processor cores to better tailor them to customer needs.  Read more: The three-way race for GPU dominance in the data centerTo read this article in full, please click here

HTTP RFCs have evolved: A Cloudflare view of HTTP usage trends

HTTP RFCs have evolved: A Cloudflare view of HTTP usage trends
HTTP RFCs have evolved: A Cloudflare view of HTTP usage trends

Today, a cluster of Internet standards were published that rationalize and modernize the definition of HTTP - the application protocol that underpins the web. This work includes updates to, and refactoring of, HTTP semantics, HTTP caching, HTTP/1.1, HTTP/2, and the brand-new HTTP/3. Developing these specifications has been no mean feat and today marks the culmination of efforts far and wide, in the Internet Engineering Task Force (IETF) and beyond. We thought it would be interesting to celebrate the occasion by sharing some analysis of Cloudflare's view of HTTP traffic over the last 12 months.

However, before we get into the traffic data, for quick reference, here are the new RFCs that you should make a note of and start using:

  • HTTP Semantics - RFC 9110
    • HTTP's overall architecture, common terminology and shared protocol aspects such as request and response messages, methods, status codes, header and trailer fields, message content, representation data, content codings and much more. Obsoletes RFCs 2818, 7231, 7232, 7233, 7235, 7538, 7615, 7694, and portions of 7230.
  • HTTP Caching - RFC 9111
    • HTTP caches and related header fields to control the behavior of response caching. Obsoletes RFC 7234.
  • Continue reading

Revisiting BGP Convergence

My video on BGP convergence elicited a lot of . . . feedback, mainly concerning the difference between convergence in a data center fabric and convergence in the DFZ. Let’s begin here—BGP hunt and the impact of the MRAI are very real in the DFZ. Withdrawing a route can take several minutes.

What about the much more controlled environment of a data center fabric?

Several folks pointed out that the MRAI is often set to 0 in DC fabrics (and many implementations by default). Further, almost all implementations will use an MRAI of 0 for the first received update, holding the second and subsequent advertisements by the MRAI. Several folks also pointed out that all the paths through a DC fabric are the same length, so the second part of the equation is also very small.

These are good points—how do they impact BGP convergence? Let’s use the network below, a small slice of a five-stage butterfly fabric, to think it through. Assume every router is in a different AS, so all the peering sessions are eBGP.

Start with A losing its connection to 101::/64—

  • T1: A withdraws its route from B and C
  • T2: B withdraws its route from D and E, Continue reading

Share This Protein Shake Recipe with Your Gym Friends!

What goes into a perfect protein shake? If you’re looking for an answer to that question, you’ll find it in Protein and Greens by Vega. This convenient powder provides a perfect blend of protein, greens, and other nutrients to help support optimal health.

Protein and Greens by Vega is a great way to get your daily greens and protein. It’s a convenient powder that can be added to water or your favorite beverage. It’s also a good source of fiber and antioxidants.

If you’re looking for a convenient way to get your daily greens and protein, Protein and Greens by Vega is a perfect choice. It’s a convenient powder that can be added to water or your favorite beverage. It’s also a good source of fiber and antioxidants.

Vega Blueberry Vanilla Smoothie Recipe

This Vega Blueberry Vanilla Smoothie recipe is the perfect way to start your day! It’s packed with healthy ingredients like Vega Protein and Greens, almond milk, banana, and blueberries. Plus, it’s super easy to make – just blend and go!

Ingredients:

– 1 scoop Protein and Greens by Vega

– 1 cup unsweetened almond milk

– 1/2 banana

– 1 cup frozen blueberries

– 1 teaspoon vanilla Continue reading

10 Reasons Why Customers Choose VMware NSX to Automate Networking and Security

By now, you’ve probably heard about why you should automate network management. Not only does automation save time and effort, but it also reduces risk. As Gartner notes, for instance, organizations that automate about 70 percent of their network change management operations will see a 50 percent reduction in outages. They’ll also cut in half the time it takes to roll out new services.

The bigger question many teams face surrounding network automation, however, is how to automate. With so many tools on the market that promise to help automate networking and security, which solution is the best fit for your needs? What should you look for from an automation lens when considering a networking platform?

To provide clarity on those questions, we’ve put together a list of the reasons why customers choose VMware NSX in order to deploy applications at scale with greater speed, efficiency, and security. VMware NSX, the platform for network virtualization, provides instant and programmatic provisioning for fast, highly available, and secure infrastructure. The automation capabilities of NSX listed below maximize time savings and minimize risk when managing distributed, multi-cloud environments.                            Continue reading

Inside Ansible Automation Platform’s Automation Services Catalog

Automation services catalog blog

Red Hat Ansible Automation Platform 2.2 introduces a technical preview of automation services catalog. 

Automation services catalog was first developed in the cloud at console.redhat.com, with capabilities for fast, agile development and feature release. Over time, Red Hat continually adapted features  to meet customer requirements and incorporate their feedback. As customers became more familiar with the benefits, they’ve since requested the ability to access these catalog components within their firewalled infrastructure with direct access to the Ansible clusters and their corporate identity services. We continue to listen and are providing a private version of automation services catalog, installed by the platform installer alongside automation controller and private automation hub.

 

Products, Portfolios and Platforms

As far as catalogs go, there is a fairly standard pattern to follow. Here is the first glimpse of the user interface.

This image shows what are known as “products”. Products reside within “portfolios,” which allow the administrator to group products into sharable, access controlled folders. Products are simply references to a job template or workflow. 

What I really like about having this new level of abstraction is that I can reference the same job template in a product multiple times. Continue reading

netsim-tools VLAN Trunk Example

Last week I described how easy it is to use access VLANs in netsim-tools. Next step: VLAN trunks.

VLAN trunks are supported from netsim-tools release 1.2.2 and are currently implemented on Arista EOS, Cisco IOSv, VyOS, Dell OS10 and Nokia SR Linux.

We’ll add two Linux hosts to the lab topology used in the previous blog post, resulting in two switches, two Linux hosts in red VLAN and two Linux hosts in blue VLAN.

Read more …

6 Years Creating Content for You

Hello my friend,

Typically on this date, June the 5th we celebrate the birthday of our company, Karneliuk.com. It started with a blog back in 2016 and since then we are constantly creating, what we believe is, interesting and useful educational content in the area of network technologies and network automation. We thank you a lot for being with us all this time!

Technically, we started blog earlier than June the 5th, but on that date we published our first blogpost about interconnecting Cisco IOS XR and Nokia SR OS VMs, which defined the course of the blog and the direction for the company – multivendorness. We breath multivendor network technologies every day in heterogeneous networks, which our team support for our companies and customers daily. And we build multivendor network automation to unleash the true potential of networks and IT systems being an enabler for applications and user services, rather than an obstacle draining time and money of organizations.

So, what have we done in the past twelve months? Let’s take a look.

Our Own Prometheus Exporter

One of the interesting experiences we’ve obtained in the software development was the development of Prometheus exporter to report trace Continue reading

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