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Category Archives for "Networking"

Getting started with Cloudflare Apps

We recently launched our new Cloudflare Apps platform, and love to see the community it is building. In an effort to help people who run web services such as websites, APIs and more, we would like to help make your web services faster, safer and more reliable using our new Apps Platform by leveraging our 115 points of presence around the world. (Skip ahead to the fun part if you already know how Cloudflare Apps works)

How Cloudflare apps work

Here is a quick diagram of how Cloudflare apps work:

The “Origin” is the server that is providing your services, such as your website or API. The “Edge” represents a point of presence that is closest to your visitors. Cloudflare uses a routing method known as Anycast to ensure the end user, pictured on the far right, is routed through the best network path to our points of presence closest to them around the world.

Historically, to make changes or additions to your site at the edge changes to a site, you needed to be a Cloudflare employee. Now with apps, anyone can quickly make changes to the pages rendered to their users via Javascript and CSS. Today, you Continue reading

BrandPost: Why An Intelligent WAN Edge Solution Is Key To Branch Office Success

The concept of the “thin branch” enabled by simplifying infrastructure has been around for as long as there have been branch offices. Branch offices are typically a microcosm of the company headquarters, but without the necessary IT staff to run them. It’s common to find a myriad of network and security equipment in a branch including a router, firewall, WAN optimizer, VPN concentrators, along with almost anything else you can think of. This, of course, results in an operational nightmare as network administrators must deal with multiple devices in dozens, hundreds or even thousands of branch locations. In small networks it can be extremely challenging to track all the different hardware components and related software versions across the various locations. In large networks, this task is impossible as the number of possible combinations of hardware and software grows exponentially in relation to the number of locations.To read this article in full or to leave a comment, please click here

Arista eAPI

The sFlow and eAPI features of EOS (Extensible Operating System) are standard across the full range of Arista Networks switches. This article demonstrates how the real-time visibility provided by sFlow telemetry can be combined with the programmatic control of eAPI to automatically adapt the network to changing traffic conditions.

In the diagram, the sFlow-RT analytics engine receives streaming sFlow telemetry, provides real-time network-wide visibility, and automatically applies controls using eAPI to optimize forwarding, block denial of service attacks, or capture suspicious traffic.

Arista eAPI 101 describes the JSON RPC interface for programmatic control of Arista switches. The following eapi.js script shows how eAPI requests can be made using sFlow-RT's JavaScript API:
function runCmds(proto, agent, usr, pwd, cmds) {
var req = {
jsonrpc:'2.0',id:'sflowrt',method:'runCmds',
params:{version:1,cmds:cmds,format:'json'}
};
var url = (proto || 'http')+'://'+agent+'/command-api';
var resp = http(url,'post','application/json',JSON.stringify(req),usr,pwd);
if(!resp) throw "no response";
resp = JSON.parse(resp);
if(resp.error) throw resp.error.message;
return resp.result;
}
The following test.js script demonstrates the eAPI functionality with a basic show request:
include('eapi.js');
var result = runCmds('http','10.0.0.90','admin','arista',['show hostname']);
logInfo(JSON.stringify(result));
Starting sFlow-RT:
env "RTPROP=-Dscript.file=test.js" ./start.sh
Running the script generates the following output:
2017-07-10T14:00:06-0700  Continue reading

67% off BioShock: The Collection for PlayStation 4 – Deal Alert

Return to the cities of Rapture and Columbia and experience the award-winning BioShock franchise like never before. BioShock: The Collection retells the epic journeys of the BioShock universe beautifully remastered in 1080p. BioShock: The Collection contains all single-player content from BioShock, BioShock 2, and BioShock Infinite, all single-player add-on content, the 'Columbia’s Finest' pack, and Director’s Commentary: Imagining BioShock, featuring Ken Levine and Shawn Robertson. The list price for the PlayStation 4 version has been reduced 67% to just $19.99. XBox One and PC versions have been discounted as well. See this deal on Amazon.To read this article in full or to leave a comment, please click here

37% off DYMO LabelWriter Twin Turbo Label Printer and Mailing Scale – Deal Alert

This label maker from Dymo is an all-in-one kit with everything you need to address, weigh and stamp your mail. Thermal printing technology is silent and never needs ink, toner, or ribbons. 300 dpi resolution 55 labels per minute print speed. Includes label printer, scale, 1 roll of 200 DYMO Stamps postage labels and 1 roll of 130 DYMO address labels, as well as a 2-year limited manufacturer warranty. This desktop mailing solution averages 4 out of 5 stars from over 720 people on Amazon (read reviews), there the typical list price has been reduced 37% from $190 down to $119.59. See this deal now on Amazon.To read this article in full or to leave a comment, please click here

Cisco’s M5 UCS servers take intent-based approach to data center

It's not the server -- it's the system. That's the word from Cisco as it rolls out its new, M5 generation Unified Computing System rack and blade servers, triggered by Intel's release of the Xeon Scalable Processor platform.Cisco's new servers use the Xeon Scalable processors -- unveiled Tuesday in New York -- to fuel performance as well as increase server density and throughput.  But the value in the UCS product family lies in how the hardware works with configuration management and optimization software to make data centers run at peak efficiency, company officials say.To read this article in full or to leave a comment, please click here

Cisco’s M5 UCS servers take intent-based approach to data center

It's not the server -- it's the system. That's the word from Cisco as it rolls out its new, M5 generation Unified Computing System rack and blade servers, triggered by Intel's release of the Xeon Scalable Processor platform.Cisco's new servers use the Xeon Scalable processors -- unveiled Tuesday in New York -- to fuel performance as well as increase server density and throughput.  But the value in the UCS product family lies in how the hardware works with configuration management and optimization software to make data centers run at peak efficiency, company officials say.To read this article in full or to leave a comment, please click here