How to Build a Spine and Leaf Fabric with Ansible

Introduction Today we will be exploring the world of Ansible and how it can be used to automate the network. Within this tutorial we will start with automating the provisioning of an L3 spine and leaf fabric. Once complete we will then automate the connectivity testing across the fabric. Let's…

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What Are the Key Differences Between Cisco IOS and IOS-XE?

IOS Classical IOS is based upon a monolithic kernel. This monolithic kernel runs all of its modules within the same memory space, providing no CPU or memory separation. Therefore, in the event of a single process/module crashing, the entire system would become unresponsive. Another disadvantage is around upgrades, as…

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How do CDNs work with Anycast based DNS servers?

When it comes to Content Delivery Networks (CDNs), there is something that has always puzzled me; How do CDNs work with Anycast based DNS servers? Background For example, the way in which CDNs function is to serve content from nodes closest to the client. CDNs determine the closest node to…

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