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Category Archives for "Networking"

ACI MultiPod – Enable Standby APIC

APIC Controller Cluster You actually need three APIC controller servers to get the cluster up and running in complete and redundant ACI system. You can actually work with only two APICs and you will still have a cluster quorum and will be able to change ACI Fabric configuration. Loosing One Site In the MultiPod, those three controllers need to be distributed so that one of them is placed in the secondary site. The idea is that you still have a chance to keep your configuration on one remaining APIC while losing completely primary site with two APICs. On the other

The post ACI MultiPod – Enable Standby APIC appeared first on How Does Internet Work.

Last Week on ipSpace.net (2019W14)

Last Thursday I started another experiment: a series of live webinar sessions focused on business aspects of networking technologies. The first session expanded on the idea of three paths of enterprise IT. It covered the commoditization of IT and networking in particular, vendor landscape, various attempts at segmenting customers, and potential long-term Enterprise IT paths. Recording is already online and currently available with standard subscription.

Although the attendance was lower than usual, attendees thoroughly enjoyed it – one of them sent me this: “the value of ipSpace.net is that you cut through the BS”. Mission accomplished ;)

DNS Privacy at IETF 104

From time to time the IETF seriously grapples with its role with respect to technology relating to users' privacy. Should the IETF publish standard specifications of technologies that facilitate third party eavesdropping on communications or should it refrain from working on such technologies? Should the IETF take further steps and publish standard specifications of technologies that directly impede various forms of third party eavesdropping on communications? Is a consistent position from the IETF on personal privacy preferred? Or should the IETF be as agnostic as possible and publish protocol specifications based solely on technical coherency and interoperability without particular regard to issues of personal privacy? This issue surfaced at IETF 104 in the context of discussions of DNS over HTTPS, or DOH.

Celebrating 50 Years of the RFCs That Define How the Internet Works

First page of RFC 1

50 years ago today, on 7 April 1969, the very first “Request for Comments” (RFC) document was published. Titled simply “Host Software”, RFC 1 was written by Steve Crocker to document how packets would be sent from computer to computer in what was then the very early ARPANET. [1]

Steve and the other early authors were just circulating ideas and trying to figure out how to connect the different devices and systems of the early networks that would evolve into the massive network of networks we now call the Internet. They were not trying to create formal standards – they were just writing specifications that would help them be able to connect their computers. Little did they know then that the system they developed would come to later define the standards used to build the Internet.

Today there are over 8,500 RFCs whose publication is managed through a formal process by the RFC Editor team. The Internet Engineering Task Force (IETF) is responsible for the vast majority (but not all) of the RFCs – and there is strong process through which documents move within the IETF from ideas (“Internet-Drafts” or “I-Ds”) into published standards or informational documents[2].

50 years Continue reading

39 – DCNM 11.1 and VXLAN EVPN Multi-site Update

Dear Network experts,

It took a while to post this update on DCNM 11.1 due to other priorities, but I should admit it’s a shame due to all great features that came with DCNM 11.1. As mentioned in the previous post, DCNM 11.1 brings a lot of great improvements.

Hereafter is a summary of the top LAN fabric enhancements that comes with DCNM 11.1 for LAN Fabric.

Feel free to look at the Release-notes for an exhaustive list of New Features and Enhancements in Cisco DCNM, Release 11.1(1)

Fabric Builder, fabric devices and fabric underlay networks

  • Configuration Compliance display side-by-side of existing and pending configuration before deployment.

  • vPC support for BGWs (VXLAN EVPN Multi-site) and standalone fabrics.

Brownfield Migration

  • Transition an existing VXLAN fabric management into DCN.

Interfaces

  • Port-channel, vPC, subinterface, and loopback interfaces can be added and eddited with an external fabric devices.

  • Cisco DCNM 11.1(1) specific template enhancements are made for interfaces.

Overlay Network/VRF provisioning

  • Networks and VRFs deployment can be deploy automatically at the Multi-site Domain level from Site to Site in one single action.

External Fabric

  • Switches can be added to the external fabric. Inter-Fabric Connections (IFCs) can be created Continue reading

Save the Date: Hackathon@AIS

The third Hackathon@AIS will take place in Kampala, Uganda on the 19th and 20th of June 2019. The Hackathon@AIS is an event aimed at exposing engineers from the African region to Internet Standards development and usage. This will be the third event in the series following successful events held in Nairobi (2017) and Dakar (2018), each alongside the Africa Internet Summit (AIS).

See what was covered in 2017 and 2018 Hackathons@AIS here:
2017 Hackathon@AIS
2018 Hackathon@AIS

The event is targeted at network/system engineers, software developers, and/or computer science students to introduce them to existing and evolving Internet standards development that can help further their careers.

Applications for the event will open in April 2019.

Fellowships will be awarded to strong applicants where possible.

Applications will close on 12 May 2019.

For more information please contact Kevin Chege: [email protected].

Read testimonials from the 2018 Hackathon@AIS fellows.

The post Save the Date: Hackathon@AIS appeared first on Internet Society.

Help us update the Cloudflare Blog!

Help us update the Cloudflare Blog!
Help us update the Cloudflare Blog!

Want to get right to the feedback? Click here.

As you’ve probably noticed over the years, we’re always evolving and improving the look and feel of different aspects of the Cloudflare experience. Sometimes it’s more about function, other times it’s more about form, and most of the time it’s a combination of both. But there’s one area of the site that many users visit even more frequently than they visit the homepage or their dashboard, and strangely enough it hasn’t really seen any major updates in years. And if you’re reading this, that means you're looking at it.

With more than 150 current contributors, and more than 1,000 posts, we have a lot of people dedicating a lot of their time to writing blog posts. And based on the responses I see in the comments, and on Twitter, there are a lot of people who really like to read what these authors have to say (whether it has much to do with Cloudflare or not).

Well, we’d like to finally give some love to the blog. And we really want to know what you, our loyal (or even occasional) readers, think. There are two options to choose from. Continue reading

OpenConfig and Wi-Fi – The Winning Combo

Wireless isn’t easy by any stretch of the imagination. Most people fixate on the spectrum analysis part of the equation when they think about how hard wireless is. But there are many other moving parts in the whole architecture that make it difficult to manage and maintain. Not the least of which is how the devices talk to each other.

This week at Aruba Atmosphere 2019, I had the opportunity to moderate a panel of wireless and security experts for Mobility Field Day Exclusive. It was a fun discussion, as you can see from the above video. As the moderator, I didn’t really get a change to explain my thoughts on OpenConfig, but I figured now would be a great time to jump in with some color on my side of the conversation.

Yin and YANG

One of the most exciting ideas behind OpenConfig for wireless people should be the common YANG data models. This means that you can use NETCONF to have a common programming language against specific YANG models. That means no more fumbling around to remember esoteric commands. You just tell the system what you want it to do and the rest is easy.

As outlined Continue reading

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