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Category Archives for "Networking"

VXLAN and EVPN on Hypervisor Hosts

One of my readers sent me a series of questions regarding a new cloud deployment where the cloud implementers want to run VXLAN and EVPN on the hypervisor hosts:

I am currently working on a leaf-and-spine VXLAN+ EVPN PoC. At the same time, the systems team in my company is working on building a Cloudstack platform and are insisting on using VXLAN on the compute node even to the point of using BGP for inter-VXLAN traffic on the nodes.

Using VXLAN (or GRE) encap/decap on the hypervisor hosts is nothing new. That’s how NSX and many OpenStack implementations work.

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VAGRANT FOR NETWORK ENGINEERS

Vagrant is an alien word for network engineers ,we as network engineer are more close to windows environment than Linux and always try to avoid linux . But time has changed now and with introduction of automation ,SDN ,Devops  in networks professional  life has made him to come out of windows environment and  try Linux for multiple reasons as below:

  • Mostly open source projects (open stack, Docker etc. )tools are based on Linux which we as network engineers have to use.
  • Network devices are now having Linux as underlying shell.
  • Most of the software which are directly or indirectly related to networks are using development environment as Linux.

So when ever we plan to work on linux environment , we just start downloading ubantu on our windows laptop with VM box ..install both and start working.

But there is an environment known as Vagrant that will not help you do all the Linux related task but also provide an environment that helps reduce setup time and allows you to virtualize configurations for various projects.We can set up  up a virtual network environment for testing purposes, or setting up a lab,  work with python , ansible ,devops tools and much more .

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Leave your VPN and cURL secure APIs with Cloudflare Access

Leave your VPN and cURL secure APIs with Cloudflare Access
Leave your VPN and cURL secure APIs with Cloudflare Access

We built Access to solve a problem here at Cloudflare: our VPN. Our team members hated the slowness and inconvenience of VPN but, that wasn’t the issue we needed to solve. The security risks posed by a VPN required a better solution.

VPNs punch holes in the network perimeter. Once inside, individuals can access everything. This can include  critically sensitive content like private keys, cryptographic salts, and log files. Cloudflare is a security company; this situation was unacceptable. We need a better method that gives every application control over precisely who is allowed to  reach it.

Access meets that need. We started by moving our browser-based applications behind Access. Team members could connect to applications faster, from anywhere, while we improved the security of the entire organization. However, we weren’t yet ready to turn off our VPN as some tasks are better done through a command line. We cannot #EndTheVPN without replacing all of its use cases. Reaching a server from the command line required us to fall back to our VPN.

Today, we’re releasing a beta command line tool to help your team, and ours. Before we started using this feature at Cloudflare, curling a server required me to Continue reading

Intel, AMD both claim server speed records

It is so nice to see a return of competition in the CPU space. For too long it had been a one-horse race, with Intel on its own and AMD willing to settle for good enough. Revitalized with the Zen architecture, AMD is taking it to Intel once again, and you are the winner.Both sides are proclaiming massive performance records, although in both cases they come with an asterisk next to them.Intel's announcement In Intel’s case, it announced 95 new performance world records for its Intel Xeon Scalable processors using the most up-to-date benchmarks on hardware for major OEMs, including Dell, HPE, ASUS, and Super Micro, running SPECInt and SPECFP benchmarks as well as SAP HANA, ranging from single-socket systems up to eight-socket systems.To read this article in full, please click here

Intel, AMD both claim server speed records

It is so nice to see a return of competition in the CPU space. For too long it had been a one-horse race, with Intel on its own and AMD willing to settle for good enough. Revitalized with the Zen architecture, AMD is taking it to Intel once again, and you are the winner.Both sides are proclaiming massive performance records, although in both cases they come with an asterisk next to them.Intel's announcement In Intel’s case, it announced 95 new performance world records for its Intel Xeon Scalable processors using the most up-to-date benchmarks on hardware for major OEMs, including Dell, HPE, ASUS, and Super Micro, running SPECInt and SPECFP benchmarks as well as SAP HANA, ranging from single-socket systems up to eight-socket systems.To read this article in full, please click here

Juniper CEO Rahim talks network, security and multicloud trends

Juniper CEO Rami Rahim is shepherding a number of key transitions for the company. Juniper made a big bet on 400G Ethernet this summer, detailing how it plans to transition its wide-area network, data center and enterprise portfolio to 400G Ethernet. And earlier this year, Juniper released its Contrail Enterprise Multicloud software, an SDN controller that is the central component of its multicloud, intent-based networking strategy. Ahead of its NXTWORK annual customer and partner summit next week, Rahim talked with Network World’s Michael Cooney about trends and directions for the networking vendor, as Rahim aims to position Juniper more strongly against chief competitors such as Cisco, Arista, HPE, and Huawei.To read this article in full, please click here