IDG Contributor Network: Intent-based networking

In campus networking, there are a number of emerging trends impacting the way networks will be modeled in the future. These arising trends include mobility, Internet of Things (IoT), and uniformed security across the wired and wireless connections.To be in tune with these trends, a new era of networking is required that enforces policy-based automation from the edge of the network to public and private clouds using an intent-based paradigm. An example of such would be SD-Access.To read this article in full, please click here

Datanauts 138: What’s Up With Ethernet Fabrics?

Today on the Datanauts podcast, we review the state of Ethernet fabrics in 2018.

Between 2010 and 2012, before SDN became the new marketing hotness, it seemed like vendors were churning out Ethernet fabric products for the data center. Everyone had at least one fabric, and some had two or three.

As time has marched on, many of those Ethernet fabrics have dropped off the map. To catch us up and review what Ethernet fabric means today is Stefan Fouant. Stefan is the Chief Architect at Copper River Technologies, a Juniper Ambassador, a quadruple JNCIE, and author of the book Day One: Junos Fusion Data Center Up and Running.

We look at the status of Ethernet fabric protocols such as TRILL and SPB. We also dig into BGP EVPN, the latest hot fabric.

We also discuss the characteristics of a fabric, look at reasons why a fabric might make sense in your data center, and explore inter-fabric connectivity.

Show Links:

Day One: Junos Fusion Data Center Up and Running – Stefan Fouant

Shortest Path First – Stefan Fouant’s blog

Stefan Fouant on Twitter

Transparent Interconnection of Lots of Links (TRILL) – IETF

Shortest Path Bridging (SPB) – Wikipedia

BGP MPLS-Based Continue reading

Cisco CEO Chuck Robbins: Get ready for the network’s next act

Cisco’s annual user event, Cisco Live, is being held in Orlando, Florida, this week. While Orlando is home to DisneyWorld, Universal Studios and other places where fantasies come true, the one thing that isn’t make-believe is the turnaround of Cisco since Chuck Robbins took over as CEO. When the baton was passed to Robbins in August of 2015, Cisco’s stock was trading at about $25/share and had been moving sideways for years. Today, it’s trading at about $45/share and at a 17-year high, and the turnaround is well underway.Cisco goes back to the network How did Robbins get Cisco’s mojo’s back in such a short period of time? The answer lies in its roots and a refocus on the network. In fact, when Robbins took over as CEO, I wrote a post outlining some priorities for him as he stepped into the role. My first point was to approach IT through the lens of the network. In the years leading up to the transition to Robbins, I felt Cisco had tried too hard to prove itself as a server and traditional IT vendor instead of staying true to networking.To read this article in full, please click here

Cisco CEO Chuck Robbins: Get ready for the network’s next act

Cisco’s annual user event, Cisco Live, is being held in Orlando, Florida, this week. While Orlando is home to DisneyWorld, Universal Studios and other places where fantasies come true, the one thing that isn’t make-believe is the turnaround of Cisco since Chuck Robbins took over as CEO. When the baton was passed to Robbins in August of 2015, Cisco’s stock was trading at about $25/share and had been moving sideways for years. Today, it’s trading at about $45/share and at a 17-year high, and the turnaround is well underway.Cisco goes back to the network How did Robbins get Cisco’s mojo’s back in such a short period of time? The answer lies in its roots and a refocus on the network. In fact, when Robbins took over as CEO, I wrote a post outlining some priorities for him as he stepped into the role. My first point was to approach IT through the lens of the network. In the years leading up to the transition to Robbins, I felt Cisco had tried too hard to prove itself as a server and traditional IT vendor instead of staying true to networking.To read this article in full, please click here

What Is Intent-Based Networking?

This blog post was initially sent to the subscribers of my SDN and Network Automation mailing list. Subscribe here.

Whenever someone mentions intent-based networking I try to figure out what exactly they’re talking about. Not surprisingly, I get a different answer every single time. Confused by all that, I tried to find a good definition, but all I could find was vendor marketing along the lines of “Intent-based networking captures and translates business intent so that it can be applied across the network,” or industry press articles regurgitating vendor white papers.

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Medea: scheduling of long running applications in shared production clusters

Medea: scheduling of long running applications in shared production clusters Garefalakis et al., EuroSys’18

(If you don’t have ACM Digital Library access, the paper can be accessed either by following the link above directly from The Morning Paper blog site).

We’re sticking with schedulers today, and a really interesting system called Medea which is designed to support the common real world use case of mixed long running applications (LRAs) and shorter duration tasks within the same cluster. The work is grounded in production cluster workloads at Microsoft and is now part of the Apache Hadoop 3.1 release. In the evaluation, when compared to the Kubernetes’ scheduling algorithm Medea reduces median runtimes by up to 32%, and by 2.1x compared to the previous generation YARN scheduler.

…a substantial portion of production clusters today is dedicated to LRAs…. placing LRAs, along with batch jobs, in shared clusters is appealing to reduce cluster operational costs, avoid unnecessary data movement, and enable pipelines involving both classes of applications. Despite these observations, support for LRAs in existing schedulers is rudimentary.

The challenges of scheduling long-running applications

Example uses of long running application containers include streaming systems, interactive data-intensive applications (maintaining Continue reading

Cumulus content roundup: June

It’s officially summer time, so we’re bringing you the HOTTEST new content from Cumulus Networks in this month’s content roundup! Whether you want to layer on the sunscreen and enjoy our content while basking in the sun, or stay safe and cool indoors with your laptop and AC, you’re bound to enjoy what we’ve got in store for you. We’ve got new videos and white papers, and even a brand new official Cumulus Networks podcast for you to check out!

New from Cumulus:

Kernel of Truth Episode 01 – Networking Automation: “Kernel of Truth” is a Cumulus Networks podcast dedicated to bringing the best of open networking thought leadership straight to your ears. Listen to our very first episode where we discuss network automation and its impact on the industry!

5 Network automation tips and tricks for NetOps: In this white paper, we’ll give you five tips and tricks to get clarity around your automation decisions and reduce any friction that may be inhibiting (further) adoption of network automation. Check it out!

Joint solution overview: OpenStack and Cumulus Networks: By combining with Cumulus Linux, you can unify the entire stack on Linux, bringing together the OpenStack servers Continue reading

IDG Contributor Network: Is the IT help desk model broken?

There’s no doubt about it – today’s workers have fully embraced the trend toward remote working. In fact, according to last year’s Gallup “State of the American Workplace” survey, roughly 43 percent of employees report they have worked remotely.  It would seem that the genie is out of the bottle, and it’s not likely to go back in without a fight.This mass migration off premises changes the dynamic between users and IT help desk teams. An operator can no longer run down the hall to ask a user “Can you show me what the problem is with your computer?” More importantly, without having total visibility in the cloud, the operator may be completely unable to ‘see’ any problems that users are experiencing as they work remotely.To read this article in full, please click here

Arista Runs Barefoot With Tofino Programmable Switch Chips

If Andy Bechtolsheim, the chief technology officer at datacenter switching upstart Arista Networks, wanted to design ASICs to try to take a bigger piece of the switch pie – or more precisely, thought that this was a good idea at all – rest assured, Arista would be spending money engineering its own chips and fighting for capacity at the four remaining foundries that have advanced processes. …

Arista Runs Barefoot With Tofino Programmable Switch Chips was written by Timothy Prickett Morgan at .

Short Take: Practical Career Advice

One problem I’ve heard in the past is that much of the career advice given in the networking world is not practical. In this short take, I take this problem on, explaining why it might be more practical than it initially seems.

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