Whitebrand is a term used to describe a type of Ethernet switch that is a whitebox or generic manufacture but sold by a known IT brand. Juniper OCX1100, HP Open Network Switches are example. White-Box Switching + Vendor Branding = Whitebrand switching. The other term used is “britebox” but this sounds like dishwashing liquid or something you […]
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procdump -ma VisualDiscovery.exe super.dmp
Do you think of yourself as a network engineer? Cisco’s Network Programmability Engineer Specialist (CPNES) certification represents Cisco’s first crack at a certification focused on network engineering in an SDN world. Today’s post begins to examine this certification by looking at the first of the two required exams: the 600-504 NPENG exam. We’ll look at both the exam and a related video course.
Other posts in this series:
First, to set the stage, Cisco currently offers four network programmability certifications. Loosely you can think of these as two networking-focused certs, and two development-focused certs, based on job roles. For the two networking-focused certs, one focuses on design, while one (the one discussed here) looks at engineering and implementation.
Today’s post focuses on the cisco network programmability engineering specialist (CNPES) cert, and specifically the first exam: the 600-504 NPENG exam. Basically, the NPENG exam covers SDN implementation but excludes ACI, while the second required exam, 600-512 NPENGACI, includes ACI.
This list provides the links for more details – for the certification, each of the two exams, and each of Cisco’s two Continue reading
If the HP announcement of new data center networking solutions with Cumulus Linux is any indication, then we will venture to answer.
On Feb. 19, HP announced a partnership with Cumulus Networks for new HP open network switches with Cumulus Linux, the operating system for open networking. HP has designed an efficient supply chain model including a joint venture with Accton, delivery worldwide via HP logistics centers, and HP local sales and support.
Open networking was born when web-scale providers developed proprietary cloud networking that reduced CapEx costs while improving OpEx and enabling automation. Similarly, hosting companies, service providers and high-tech firms re-architected their data centers realizing similar benefits. Next, financials, government, and education entities found affordable capacity and new innovation opportunities with their cloud journey. Today, a broad range of enterprises are adopting open networking for a wide set of use cases – and for automation and rapid service delivery using Linux tools already standardized for servers.
In that context, the new HP open network switch offerings with Cumulus Linux address a range of use cases but the sweet spot is hyper-scale data center operators. Of course HP also offers the servers, storage and Continue reading
In our last post, we looked at how Kubernetes handles the bulk of it’s networking. What we didn’t cover yet, was how to access services deployed in the Kubernetes cluster from outside the cluster. Obviously services that live in pods can be accessed directly as each pod has its own routable IP address. But what if we want something a little more dynamic? What if we used a replication controller to scale our web front end? We have the Kubernetes service, but what I would call its VIP range (Portal Net) isn’t routable on the network. There are a couple of ways to solve this problem. Let’s walk through the problem and talk about a couple of ways to solve it. I’ll demonstrate the way I chose to solve it but that doesn’t imply that there aren’t other better ways as well.
As we’ve seen, Kubernetes has a built-in load balancer which it refers to as a service. A service is group of pods that all provide the same function. Services are accessible by other pods through an IP address which is allocated out of the clusters portal net allocation. Continue reading
Years ago I managed to saturate a 10GE uplink on a vSphere server I tested with a single Linux VM using less than one vCPU. On the other hand, squeezing 1 Gbps out of Open vSwitch using GRE encapsulation was called ludicrous speed not so long ago. Implementing overlay virtual networking in the hypervisor obviously carries a huge performance penalty, right? Not so fast…
Read more ...Do you think of yourself as a network engineer? Cisco’s Network Programmability Engineer Specialist (CPNES) certification represents Cisco’s first crack at a certification focused on network engineering in an SDN world. Today’s post begins to examine this certification by looking at the first of the two required exams: the 600-504 NPENG exam. We’ll look at both the exam and a related video course.
Other posts in this series:
First, to set the stage, Cisco currently offers four network programmability certifications. Loosely you can think of these as two networking-focused certs, and two development-focused certs, based on job roles. For the two networking-focused certs, one focuses on design, while one (the one discussed here) looks at engineering and implementation.
Today’s post focuses on the cisco network programmability engineering specialist (CNPES) cert, and specifically the first exam: the 600-504 NPENG exam. Basically, the NPENG exam covers SDN implementation but excludes ACI, while the second required exam, 600-512 NPENGACI, includes ACI.
This list provides the links for more details – for the certification, each of the two exams, and each of Cisco’s two Continue reading