Celebrating ECMP in Linux — part two

In part one of our series on ECMP, we discussed the basics of ECMP, the recent changes that have been made and Cumulus’ part in moving the ball forward for Linux networking. Now, it’s time to get a little more technical and review how advancements in ECMP development for IPv4 and IPv6 have made ECMP what it is today — and what it can be in the near future.

Setting the stage: defining our terminologies

Hashing algorithms

Hashing algorithms are the biggest component of ECMP behavior, so it makes sense for us to talk for a moment about what we specifically mean when we refer to each one.

1.) Per-packet hash
This hash was the original hashing algorithm used in the kernel’s ECMP behavior. It is trivially simple to understand as it basically uses a pseudo random number in the kernel at the time packet is being processed (jiffies) to determine which link in an ECMP bundle the traffic will use for egress. With this algorithm in place, each packet for a single flow could use a different link to get to the destination. This leads to all kinds of bad behaviors in TCP and higher level applications/protocols Continue reading

Google Mimics Microsoft With Direct Kubernetes Link Into Its Cloud

The framework simplifies the connection between GCP services and a GCP-hosted Kubernetes cluster or an on-premises Kubernetes cluster.

Silicon Startup Innovium Closes $77M in Series D, Ships Samples

The company has developed Ethernet switch chips for data centers. It competes against Broadcom, Barefoot, and Cavium.

SDxCentral’s Weekly Roundup — April 27, 2018

Ericsson brings 5G to Italy; Cisco enhances its SAN offerings; NetFoundry and AWS team up on IoT.

Vaulted Tiles

Pulse Secure Q&A: A Trust Model for Multi-Cloud Networks and Applications Beyond Zero Trust

Thanks to all who joined us for the Pulse Secure 2018 Next-Gen Data Center Networking Report Webinar: A Trust Model for Multi-Cloud Networks and Applications Beyond Zero Trust.

China Mobile’s 5G Trials Test Vendor Equipment Interoperability

The next phase of the operator's 5G trials will include at least 100 base stations in each of the five test cities. The trials will use equipment from multiple vendors including Ericsson, Nokia, Huawei, and ZTE.

Show 387: AWS Networking – A View From The Inside

Telefónica’s New Open Source Edge Project Cuts 5G Network Slices Into Strings

The operator’s latest open source project named OnLife tackles multi-access edge computing and other 5G use cases, using CORD-like software.

Why intent-based networking is important to the Internet of Things

Last week, Cisco made a number of product announcements that deliver the benefits of its intent-based networking (IBN) solution to Internet of Things (IoT) deployments.  Network World's Michael Cooney did a great job summarizing all the product announcements, so I won’t rehash that information, but I did want to discuss the importance of IBN to IoT.The importance of IBN to IoT IBN is something that has been theorized for almost a decade, but solutions only became available recently. The reason why there has been a lag between vision and product is that network engineers didn’t really need IBN to run their networks until recently. Environments were closed, applications were on premises, and everything was under the tight control of the IT organization.To read this article in full, please click here

Why intent-based networking is important to the Internet of Things

Last week, Cisco made a number of product announcements that deliver the benefits of its intent-based networking (IBN) solution to Internet of Things (IoT) deployments.  Network World's Michael Cooney did a great job summarizing all the product announcements, so I won’t rehash that information, but I did want to discuss the importance of IBN to IoT.The importance of IBN to IoT IBN is something that has been theorized for almost a decade, but solutions only became available recently. The reason why there has been a lag between vision and product is that network engineers didn’t really need IBN to run their networks until recently. Environments were closed, applications were on premises, and everything was under the tight control of the IT organization.To read this article in full, please click here

Canonical Taunts VMware, Launches Major Ubuntu Update

The company claims enterprises are looking for alternatives to VMware with better economics. It bids against Red Hat in many of its deals.

Showtime for Interop ITX 2018

What Happened? The Amazon Route 53 BGP Hijack to Take Over Ethereum Cryptocurrency Wallets

Yesterday, we published a blog post sharing the news and some initial details about Amazon’s DNS route hijack event to steal Ethereum cryptocurrency from myetherwallet.com. In this post, we’ll explore more details about the incident from the BGP hijack’s perspective.

As noted by Dyn, CloudFlare, and various other entities who monitor Internet routing and health, Amazon’s Route 53 (the DNS service offered by AWS) prefixes were hijacked. A BGP update taken from Isolario suggests that on 24 April, its BGP feeders were correctly receiving 205.251.192.0/23, 205.251.194.0/23, 205.251.196.0/23, 205.251.198.0/23, originated from Amazon (AS16509), until 11:04:00 (UTC). But, at 11:05:41 (UTC), Isolario recorded the first more specific /24 malicious announcements via BGP feeder and the announcements originated from eNET (AS10297) to its peer 1&1 Internet SE (AS8560). Click to enlarge image.

RIPE Stats collected the first more specific malicious advertisement at 11:05:42 (UTC) originating from eNET (AS10297), but this time through peer Hurricane Electric (AS6939).

Exactly at the same time, 11:05:42 (UTC), the Isolario BGP feeder received another update originating from eNET (AS10297) and it was also coming via Hurricane Electric (AS6939). Click to enlarge image.

Hurricane Electric has a worldwide Continue reading

Net Neutrality Hasn’t Ended, We Don’t Know When

Apparently Net Neutrality repeat

CiscoLive 2018: ‘Summer Camp for Geeks’

Are you ready for CiscoLive US 2018?  Ready for Summer Camp for Geeks?!    I think it is hard to truly be completely ready for the experience nowadays.  Why?  Because CiscoLive US is just huge with so many options of things to experience as an attendee…. more options than you have time for.  If you have been to CiscoLive US before… you KNOW this is true. And every year more and more …. and more and more … get added.  For 2018 my favorite CiscoLive add is the new ‘Content Cafe’ session type (30 minutes).  Other favorites of mine are the ‘Flip Sessions’ and the “Beers with Engineers”.  ?

Deciding where to spend your time and energy during #CLUS can be overwhelming and daunting.

What is my absolute #1 suggestion to anyone going to a CiscoLive event?  Easy – “Begin with the End in Mind“.  Know what your priorities are and then schedule your week accordingly.

STEP #1: Create Your Cisco Live 2018 Priority List

Take your goals and translate them into a priority list.

STEP #2: Learn from the Past

If you have been to CiscoLive before… Continue reading

Schneider Electric announces Edge Module for IoT processing

Schneider Electric is the latest player to jump into the edge computing game for Internet of Things (IoT) devices with the announcement of its Edge Module for mobile and IoT applications. It follows the trend of processing IoT data where it is generated rather than sending it to a remote data center.Schneider Electric is a European giant that mostly specializes in energy management and power systems. So, it’s no surprise that the Edge Module comes with integrated power and cooling systems. That includes single- or three-phase power with a flexible power train in multiple ranges, N+1 standard cooling, and package cooling units mounted on the outside of the module to eliminate the need for external condensers or piping.To read this article in full, please click here

Lenovo 2018 Next-Gen Data Center Networking Report Webinar Q&A: Future-proof Your Data Center Networking

Thanks to all who joined us for the Lenovo 2018 Next-Gen Data Center Networking Report Webinar – Future-proof Your Data Center Networking. Read the full Q&A.

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Short Take – The Subsidiarity Principle

In this Network Collective Short Take, Russ White discusses how the subsidiarity principle can be applied to network design decisions.

Russ White

The post Short Take – The Subsidiarity Principle appeared first on Network Collective.

Visually Impaired Students in Rwanda Get a New Chance

Jacqueline is attending S4 secondary school HVP Gatagara. She used to read well, but when she reached primary five she went blind and started using audios.

“Studying with audios was challenging” she explains. “Sometimes I got bored and fell asleep. As time went by, I got experienced and I was able to pass my national examination regardless of my blindness.”

A project led by The Internet Society Rwanda Chapter and supported by Beyond the Net Funding Programme is implementing a breakthrough solution that will impact Rwanda’s education sector, addressing the urgent need of a functional learning environment for the visually impaired students.Visual impaired people are not aware of benefits they can get from the Internet. Awareness of what is possible and what is already available is crucial especially for blind students. Young Jacqueline believes that big things have small beginnings and that the Internet will give all students a better opportunity for a successful education: “We have a lot of books here, but we can’t take them home as others do. My request is to turn these books into audios and make them accessible to allow me and my classmates to keep on studying.”

A project called Continue reading