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Learn how to establish automated application lifecycle management in your NFV environment. Check out our recent DemoFriday featuring Dialogic and Oracle to see how VNFs can work with a MANO-layer application to dynamically respond to changes in traffic.
Introduction
This post will look at the steps involved in BGP convergence and how it interacts with IGP to converge.
Any network of scale will use route reflectors (RRs) so this post will focus on deployments with RRs. Networks running a full mesh will have all paths available which makes hot potato routing and fast convergence easily achievable, at the cost of scaling and management overhead. A combination of full mesh and RRs is also possible where one scenario would be to run a full mesh within a point of presence (PoP) and RRs within the pop, peering with central RRs.
BGP can be used for both internal (iBGP) and external (eBGP) peerings and convergence and timers differ depending if it’s internal or external peerings.
BGP is a path vector protocol which means that it behaves as a distance vector protocol where it can only advertise routes that are installed into the RIB. There is an exception to the rule when BGP selective route download (SRD) is used to not download routes to the RIB but still advertise the routes. BGP will by default only install one path into the RIB even if there are multiple equal candidates and it Continue reading
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© Arun Sriraman |
This is a guest repost by Barzan Mozafari, who is part of a new startup, www.snappydata.io, that recently launched an open source OLTP + OLAP Database built on Spark.
The growing market for Big Data has created a lot of interest around approximate query processing (AQP) as a means of achieving interactive response times (e.g., sub-second latencies) when faced with terabytes and petabytes of data. At the same time, there is a lot of misinformation about this technology and what it can or cannot do.
Having been involved in building a few academic prototypes and industrial engines for approximate query processing, I have heard many interesting statements about AQP and/or sampling techniques (from both DB vendors and end-users):
Myth #1. Sampling is only useful when you know your queries in advance
Myth #2. Sampling misses out on rare events or outliers in the data
Myth #3. AQP systems cannot handle join queries
Myth #4. It is hard for end-users to use approximate answers
Myth #5. Sampling is just like indexing
Myth #6. Sampling will break the BI tools
Myth #7. There is no point approximating if your data fits in memory
Although there is a Continue reading
In this episode of Network Matters with Ethan Banks, learn about what the Internet of Things means to you, your network, and your business. Ethan explains how IoT is significant and why security is the main consideration when it comes to the network.
Ethan is the co-host of the Future of Networking Summit at Interop Las Vegas. Learn more about the conference program or register for Interop, May 2-6 in Las Vegas.
Before businesses can reap benefits from IoT, IT leaders must create a solid technical foundation.
Network slicing is about as specific as it gets, so far.
We are pleased to announce the first official video learning opportunity for VMware NSX technology – VMware NSX Fundamentals LiveLesson from VMware Press. This video course will provide viewers the information needed to understand NSX concepts, components and deployment options. As an added benefit, this course used the most recently version (VMware NSX 6.2) at its foundation to make sure you have the most current materials available for your reference. As it is based on NSX 6.2, the breadth of new features available are covered in detail including multi-vCenter, enhanced NSX operations tools, NSX automation and more! Continue reading
Howard Marks explains why he was wrong about how hybrid storage systems will evolve.
Traditionally, the first post in the series describes how to setup a development environment. This time I’ll do it DevOps-style. I’ll show how to use Packer to automatically create and configure a VM with UNetLab and Jenkins pre-installed.
Continue reading