Packetlife´s What the Hell is SDN?A short overview from Packetlife about the SDN topic which kinda floods the networking news at the moment:
If you follow any number of news feeds or vendor accounts on Twitter, you’ve no doubt noticed the term “software-defined networking” or SDN popping up more and more lately. Depending on whom you believe, SDN is either the most important industry revolution since Ethernet or merely the latest marketing buzzword (the truth, of course, probably falls somewhere in between)
Build your own free IOS-XE lab
Cisco recently made a virtual CSR available which allows (amongst the real use) to create a virtual lab based on the CSR 1000v. Please take care on this, the CSR 1000V requires at least 4 GB of memory, it wont work with less!
Miroslaw Burnejko´s Build IOS-XE Lab for Free
INE´s Installing the cloud services router 1000v in ESXi 5.1
This document describes the use of the vempkt command in order to capture traffic on Nexus 1000V Series Switches.
It is difficult to troubleshoot issues on the Nexus 1000V Series Switches because there is no physical switch to put your hands on. Much of the time, a packet capture is necessary in order to determine if the packets are sent upstream.
Technical Document Updates
Cisco´s Technical Documentation Updates
You should check out this link if you want to get an overview on the Cisco technical documentation updates.