We sit down with Tom Burns of Dell to get an update on Dell's open networking efforts, including support for additional switch OSs. We also discuss the risks the company took in embracing the concept, and the implications of HP's recent open-source switch OS release.
The post PQ Show 62: Open Networking At Dell appeared first on Packet Pushers.
"Traditional BSS will not be able to handle the shift from the physical network to the virtual network."
In this week's feature interview we're chatting with Chris Rock from Kustodian. Chris did a great presentation at Ruxcon last week about how easy it is to hack people to death!
He's found out just how easy it is to register births and deaths in the united states and Australia via online systems. He says it's a problem that could result in a virtual baby harvest for fraudsters who plan ahead. It's really fun stuff, that's this week's feature.
Network namespaces allow you to provide unique views of the network to different processes running on a Linux host. If you’re coming from a traditional networking background, the closest relative to network namespaces would be VRF (Virtual Routing and Forwarding) instances. In both cases the constructs allow us to provide a different network experience to different processes or interfaces. For the sake of starting the conversation, let’s quickly look at an example of both VRFs and network namespaces so you get an idea of how they work.
The easiest scenario to illustrate either of these technologies is out of band management. Take for instance this very simple network diagram…
Note: I’m being purposefully vague here about the network layout and addressing. Bear with me for a moment while I get to the point.
As you can see, we have two users that live on the same segment (forgive me for not drawing an Ethernet segment connecting the two). Let’s assume that the user on the left has to traverse northbound to get to resources that hang off the top network cloud. Let’s also assume the user on the right has to Continue reading
There is an interesting parallel with the Open vSwitch architecture, see Open vSwitch performance monitoring, which maintains a cache of active flows in the Linux kernel to accelerate forwarding. In the SDN routing case, active prefixes are pushed to the switch ASIC in order to bypass the slower software router.In this example, the software is being used in passive mode, estimating the cache hit / miss rates without offloading routes. The software has been configured to manage a cache of 10,000 prefixes. The first screen shot shows the cache warming up.
I’ve had a number of folks approach me about the topic of development environments, so I figured it was worth a blog post.
Maybe you’re curious what a development environment is, or perhaps you’re working through the challenge of developing code on one platform, and deploying on another. Maybe you already have a development environment - like a virtual machine - but you aren’t happy with your workflow, and feel it could use some upgrades.
If any of the above apply to you, this post should be useful to you.
Imagine yourself as a member of a software development team. You’re all working on the MegaAwesome project, which aims to solve global warming, world hunger, and basically anything wrong on this earth. With such high aspirations, it is important to put a process in place that ensures maximum developer efficiency, while maintaining an uncompromisingly high level of quality.
Any mature software development team will leverage version control like Git to ensure changes to the codebase are properly tracked and managed. They will also likely leverage some kind of continuous integration, or build server like Jenkins to run automated static code analysis (i.e. PEP8) or unit Continue reading
If you've got it, flaunt it — and integrate it all together.
Shares slide 9% on a light Q1 forecast.
