Cisco DevNet Express DNA Sandbox v2
DevNet Express (for DNA) v2
https://learninglabs.cisco.com/tracks/devnet-express-dna
https://github.com/CiscoDevNet/
https://github.com/CiscoDevNet/devnet-express-code-samples
https://github.com/CiscoDevNet/apic-em-learning-labs/blob/master/labs/apic-em-1-3-basic/1.md
http://virl-dev-innovate.cisco.com/
VIRL is Cisco's easy-to-use, powerful, and extensible network modeling and simulation environment that enables users to:
Build highly-accurate models of existing or planned networks.
Design, configure, and operate networks using authentic versions of Cisco's network operating systems, including IOSv, IOSv Layer-2, IOS-XRv, NX-OSv, CSR1000v and ASAv.
Integrate 3rd-party virtual machines, appliances, VNFs, and servers.
Connect real and virtual networks to form high-fidelity development and test environments.
Design and test anywhere - VIRL is portable!
VIRL 是个好东西。
Get that Linux feeling - on Windows
在Windows里面感受Linux. 不是虚拟机的概念，应该是命令模拟执行？
cygwin1.dll， 非常重要的文件！！
