Has SDN Changed Networking?

Software Defined Everything, NFV, OpenFlow, SDDC and Orchestrators are buzz words of DC networking. An interesting point … [Read more...]

Out with the old, in with the new

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A few weeks ago I was asked to help a client turn up and move everything over to a new network. I have done this many times … [Read more...]

Using VRFs to maintain security zones in an Layer 3 datacenter network

Layer 2 Network Diagram

The number of overlay technologies available today for the datacenter are numerous and highly functional. The flexibility … [Read more...]

The Secret Sauce for Network Services

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Tunneling is the Duct Tape of Networking..It is interesting to realize that a big chunk of network features in Data Center, … [Read more...]

Cisco ACI – Speculation of its Inner Workings

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Last week I was at a Cisco users group meeting where some sales engineers were giving a presentation on the new Application … [Read more...]

Network Topologies

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Resiliency of the networks is almost the most important design criterion which needs to be considered. Packets need to be … [Read more...]

Masterclass – Tcpdump – Interpreting Output

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This Masterclass article series aims to provide in-depth technical information on the installation, usage and operation of … [Read more...]

Masterclass – Tcpdump – Expressions

This Masterclass article series aims to provide in-depth technical information on the installation, usage and operation of … [Read more...]

Masterclass – Tcpdump – Parameters

This Masterclass article series aimes to provide in-depth technical information on the installation, usage and operation of … [Read more...]

Masterclass – Tcpdump – Basics

This Masterclass article series aimes to provide in-depth technical information on the installation, usage and operation of … [Read more...]

Speaker for the Dead – Telnet

The idea of this article series is for me to play the part of a 'Speaker for the Dead' for technology that has or is becoming … [Read more...]

Speaker for the Dead – Spanning Tree Protocol

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A friend of mine* text me early last week asking if I wanted to go to the cinema and watch the film After Earth. I … [Read more...]

Network Design Challenge – Small Little Clouds

At work, we've been getting ready to deploy a few different cluster technologies. One is a set of KVM hosts to offer VMaaS … [Read more...]

Cisco OTV 101 (Legacy Multicast Mode): MAC Learning Process Walk

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What is OTV? Overlay Transport Virtualization (OTV) is a Cisco-proprietary protocol suite that allows us to extend Layer 2 … [Read more...]

The Future of F5 Networks: SDN, iRules & Node.js

Unlike some others in the network industry (until lately at least), those dealing with F5 Networks' products are probably … [Read more...]