You can drop packets using iptables on a Linux host with some level of randomness. iptables -A INPUT -m statistic --mode random --probability 0.8 -s example.com -p icmp -j DROP I also did not know that Linux has a traffic control tool for packet shaping ‘tc’: tc qdisc change dev eth0 root netem loss 5% […]
The post Tools: Dropping and Shaping Packets with iptables and tc on Linux appeared first on EtherealMind.
Cloud and software continue to impact enterprise IT spending on collaboration infrastructure.
In spring 2019 Building Network Automation Solutions course we’ll have Kristian Larsson diving into continuous integration and his virtual networking lab product (you might want to listen to the Software Gone Wild episode we did with him to get a taste of what he’ll be talking about). Christoph Jaggi did a short interview with him starting with the obvious question:
What is CI testing and how does it differ from other testing methods?
CI is short for Continuous Integration and refers to a way of developing software where changes written by individual developers are frequently (or "continuously") integrated together into a master branch/trunk, thus continuous integration.
Read more ...Serverless computing: one step forward, two steps back Hellerstein et al., CIDR’19
The biennial Conference on Innovative Data Systems Research has come round again. Today’s paper choice is sure to generate some healthy debate, and it’s a good set of questions to spend some time thinking over as we head into 2019: Where do you think serverless is heading? What is it good for today? What’s the end-goal here?
The authors see ‘critical gaps’ in current first-generation serverless offerings from the major cloud vendors (AWS, Azure, GCP). I’m sure some will read the paper as serverless-bashing, but I read into it more of an appeal from the heart to not stop where we are today, but to continue to pursue infrastructure and programming models truly designed for cloud platforms. Platforms that offer ‘unlimited’ data storage, ‘unlimited’ distributed processing power, and the ability to harness these only as needed.
We hope this paper shifts the discussion from ‘What it serverless?’ Or ‘Will serverless win?’ to a rethinking of how we design infrastructure and programming models to spark real innovation in data-rich, cloud-scale systems. We see the future of cloud programming as far, far brighter than the promise of Continue reading
Question on Reddit Ok, this is a weird question and I’ll probably get some flak for this, but is there any real proof that an SFP (1000BASE) transceiver cannot be at the end of a QSFP+ breakout? Afaik QSA type adapters are just splitters but leave the other 3 out as evidenced by how they […]
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Define the term 'Greyfield'
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I am honoured to have been selected as a delegate for Tech Field Day during Cisco Live Europe 2019 in Barcelona!
Cisco Live Europe will take place from the 27th of January until Friday 1st.
I am really looking forward to this opportunity. There are some really great names among the list of delegates that I hope to be interacting with quite a lot, both during and after the event.
I am still to receive the official list of presenters, so I can’t tell you just who all the presenters will be, but im sure the Tech Field Day crew will release that information shortly.
When possible, I will be blogging about the presenters for sure. Also, during the event I will be posting to twitter so stay tuned.
A big thank you to Ben and Tom from Tech Field Day for extending an invitation! I can’t wait!
Until then, take care!
/Kim
https://techfieldday.com/event/cleur19/
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Hello World This is an overview of what I think Cisco ACI actually is. It uses some examples from the lab environment to show you how the things look like when you start to work with ACI. There are other articles in the works which will be online soon and which will go in details through the real configuration of ACI and best practices while doing it. What is this Cisco ACI Fabric? Cisco ACI is a datacenter network Fabric. It actually means that it is a networking system of more networking L3 switches that have a modified, next-generation OS
The post What is Cisco ACI? appeared first on How Does Internet Work.
2018 was a big year for NSX-T Data Center, VMware’s network virtualization platform designed and optimized for application workloads running on both vSphere and non-vSphere environments, container platforms, and public clouds. In addition to supporting core use cases around security, automation, and multi-cloud networking, NSX-T Data Center has continued to expand the capabilities of the platform to include enabling networking and security for emerging use cases around containers and cloud-native applications. To support these use cases and increasingly deliver value to customers, NSX-T Data Center saw new versions released, improvements made to plug-ins, and integrations across an expanding ecosystem. 2018 also saw NSX-T Data Center gain significant momentum in terms of customer adoption, delivering enhanced and new capabilities across all use cases to a quickly growing number of customer deployments.
In June, NSX-T Data Center 2.2 was released, bringing with this the ability to manage Microsoft Azure based workloads, referred to as NSX Cloud. The NSX-T Data Center platform was also updated to provide networking and security infrastructure for VMware Cloud on AWS. Other notable capabilities included enhanced data path mode in N-VDS, an improved controller cluster deployment experience, guest Continue reading
In just over one year, Microsoft support for Windows Server 2008 will come to an end. Without the proper planning in place, the ripple effects may impact your business. The cost of maintenance will skyrocket, while security and compliance risks will increase without regular patches.
So, how can companies beat the clock? The short answer is enterprise container platforms can provide a fast and simple way to transform expensive and difficult-to-maintain applications into efficient, secure and portable applications ready for modern infrastructure – whether current Windows Server releases (such as WS 2016 or later) and/or into the cloud. Taking this approach saves a significant amount of money and improves security and performance across the application lifecycle.
We are already seeing immediate demand from customers in modernizing their existing Windows Server applications in preparation for the end of support in January 2020 – here are five key takeaways we have learned in the process.
The fact is that most data in the largest businesses (or companies) in the world run on legacy applications. And these applications can continue to provide value if enterprises containerize and migrate them to modern environments to make them more Continue reading
On Tuesday of next week (15-Jan-2019) I will be part of an amazing group of people who are lucky enough …
The post Networking Field Day Exclusive with Cisco Service Provider appeared first on Fryguy's Blog.
The year ahead for high performance computing promises some interesting twists and turns. …
CPU Wars and Exascale Clarity: HPC in 2019 was written by Michael Feldman at .
SDxCentral Weekly Wrap for January 11, 2019: AT&T is set to slash jobs as it touts its 5G and SDN progress, and Kubernetes topped IT job search terms in 2018.
