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Category Archives for "Networking"

Implications of Valley-Free Routing in Data Center Fabrics

As I explained in a previous blog post, most leaf-and-spine best-practices (as in: what to do if you have no clue) use BGP as the IGP routing protocol (regardless of whether it’s needed) with the same AS number shared across all spine switches to implement valley-free routing.

This design has an interesting consequence: when a link between a leaf and a spine switch fails, they can no longer communicate.

For example, when the link between L1 and C1 in the following diagram fails, there’s no connectivity between L1 and C1 as there’s no valley-free path between them.

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Cumulus content roundup: September

Who’s ready for another Cumulus content roundup? This month we kept busy with step-by-step guides, tips and tricks, and even kicked off a new series, Tales from the field! Grab a seat and settle in to learn more about everything from EVPN to ZTP, and how they benefit you. Happy reading!

From Cumulus Networks:

We stand with open source: We’ve come a long way from where we began as a company. Find out why we’re passionate about open source networking, what we’ve brought to the table in the last couple of years, and our goals for the future.

5 tips for transitioning to 100G networking: Are you ready to increase your networking speed and pack more computing into the same space? You’re going to want to read these 5 tips on making the transition to 100G networking as smooth as possible.

EVPN behind the curtains: Confused about EVPN? Read this blog post for a step-by-step understanding of EVPN and what it means to you.

Tales from the field: Best practices for initial provisioning (Part 1): Let’s dive into ZTP! Read part one of “Tales from the field,” a series, and find out how to use automation tools to Continue reading

Windows for Network Automation?

The OS landscape is changing and, yes, you can learn and run network automation tools on Windows.

Windows for Network Automation?

After a hot, dry June day in Richmond I boarded an empty train. It being just myself and a couple opposite we struck up a conversation, awaiting the train’s departure. Over the next twenty minutes, as the train slowly worked through a procession of sun-baked stations, I discovered that my companions worked in IT, but in a much earlier time. The white-haired gent confessed to be a C programmer back in the 60s. We talked about software, home lab specs, and genial conversation flowed from mutual interests. However, when I idly announced ‘Microsoft have really changed, Windows has greatly improved’ the C gent gave my comments short shrift and cut them down with:

‘They can’t change, they’re too big.’

No matter, it was a serendipitous meeting that enriched a dull train journey.

That encounter stuck with me, especially the rejection of Microsoft, and I was reminded of it last week in a brief exchange with David Bombal on twitter. The #netdevops guys put together a video about using Windows as a developer environment and David mentioned some negative comments they had received Continue reading

Hitachi Vantara unveils a wide range of data center products

Hitachi Vantara launched a wide range of new hyper-converged infrastructure (HCI) systems, software management, and automation tools at its Hitachi Next 2018 conference taking place in San Diego.The move is meant to be a convergence of products, just as Hitachi Ventara as a company is going through a convergence. The U.S. subsidiary of the Japanese tech giant was formed last year by combining three business units: Hitachi Data Systems, the systems and storage infrastructure business; the Hitachi Insight Group IoT business; and the Pentaho Big Data business.With on-premises hardware falling out of favor to the cloud, Hitachi Vantara is trying to help customers that keep on-prem systems get the most out of their systems and bring as much of the cloud experience to the data center.To read this article in full, please click here

Hitachi Vantara unveils a wide range of data-center products

Hitachi Vantara launched a wide range of new hyperconverged infrastructure (HCI) systems, software management, and automation tools at its Hitachi Next 2018 conference taking place in San Diego.The move is meant to be a convergence of products, just as Hitachi Ventara as a company is going through a convergence. The U.S. subsidiary of the Japanese tech giant was formed last year by combining three business units: Hitachi Data Systems, the systems and storage infrastructure business; the Hitachi Insight Group IoT business; and the Pentaho Big Data business.To read this article in full, please click here

Hitachi Vantara unveils a wide range of data-center products

Hitachi Vantara launched a wide range of new hyperconverged infrastructure (HCI) systems, software management, and automation tools at its Hitachi Next 2018 conference taking place in San Diego.The move is meant to be a convergence of products, just as Hitachi Ventara as a company is going through a convergence. The U.S. subsidiary of the Japanese tech giant was formed last year by combining three business units: Hitachi Data Systems, the systems and storage infrastructure business; the Hitachi Insight Group IoT business; and the Pentaho Big Data business.To read this article in full, please click here

5 criteria for application-aware SD-WANs

Over the past five years, SD-WANs deployments have skyrocketed. And for good reason: They increase network agility and cut the cost of network transport.One common myth about SD-WANs, however, is that they improve application performance. They certainly can under some circumstances, but there is no guarantee they will under all situations. SD-WANs address only part of the transformation of the network to becoming a digital enabler. SD-WANs must now become smarter, or “application aware,” to optimize user experience, improve customer service, and increase worker productivity. The requirement to have an application-aware network has never been more urgent, as application performance has a direct impact on a company’s top and bottom line. For example, according to an Accenture survey, 66 percent of millennials have changed their brand loyalties because of a bad user experience. Also, a recent ZK Research survey found that workers are 14 percent less productive than they could be as a result of poor application performance. Make no mistake; poorly performing applications are costing companies today.To read this article in full, please click here

5 criteria for application-aware SD-WANs

Over the past five years, SD-WANs deployments have skyrocketed. And for good reason: They increase network agility and cut the cost of network transport.One common myth about SD-WANs, however, is that they improve application performance. They certainly can under some circumstances, but there is no guarantee they will under all situations. SD-WANs address only part of the transformation of the network to becoming a digital enabler. SD-WANs must now become smarter, or “application aware,” to optimize user experience, improve customer service, and increase worker productivity. The requirement to have an application-aware network has never been more urgent, as application performance has a direct impact on a company’s top and bottom line. For example, according to an Accenture survey, 66 percent of millennials have changed their brand loyalties because of a bad user experience. Also, a recent ZK Research survey found that workers are 14 percent less productive than they could be as a result of poor application performance. Make no mistake; poorly performing applications are costing companies today.To read this article in full, please click here

Cisco CEO: Webex service outage ‘unacceptable’

Cisco Webex users continue to experience intermittent problems today, some 24 hours after a complete outage of the collaboration system started – a situation that prompted company CEO Chuck Robbins to Tweet:“The @webex outage today is unacceptable, and we apologize for the disruption caused to you, our customers. Webex Meetings is now functional. Our engineers are working to restore Webex Teams and ensure this doesn’t happen again. Thank you for your patience & trust.”RELATED: 4 reasons Microsoft Teams will kill Slack… and 4 reasons it won’t According to the company’s website, a major outage began at 0122 GMT on Sept. 25, 2018, and shut down all Webex services, including Calling, Meetings, Control Hub, Hybrid Services, and Team.   To read this article in full, please click here

History Of Networking – John Fraizer – BGP Route Servers

In this History of Networking episode, John Fraizer joins the Network Collective crew to talk about his involvement in the first IX in the Chicago area and how that lead to the creation of an open source BGP route server.
John Fraizer
Guest
Russ White
Host
Donald Sharp
Host

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post History Of Networking – John Fraizer – BGP Route Servers appeared first on Network Collective.

The Best Practice Forum on Gender and Access: Empowering Women Online

A Need for More Gender-Disaggregated Data

While Internet access and use is rapidly growing all over the world, women still face several challenges that hinder them from benefiting meaningfully from it. The proportion of women able to access and use the Internet is 12% lower than the proportion of men accessing and using it worldwide. This gap is even bigger in developing countries where only one out of seven women use the Internet.

These numbers highlight some of the discrepancies that the digital gender gap is both producing and reproducing. However, understanding them and to what extent they affect women’s online lives requires more data. While many studies have been conducted in the last few years in order to gather evidence about the existing barriers, there are still many aspects of the phenomenon that need to be studied in-depth, particularly at grassroots levels.

Various recent efforts – including those of the W20, the UN Broadband Commission on Sustainable Development, the Alliance for Affordable Internet (A4AI), the World Wide Web Foundation, the GSMA and Association for Progressive Communications – have expressed concerns about the paucity of gender-disaggregated data and insights on Internet access and use masks the true extent of Continue reading

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