Device redundancy is usually the key to increase your network uptime. However, the trade-off of having multiple, almost identical, devices in the network does not only add configuration and management burden to administrators, but also, in most cases, calls for a more complicated design. Cisco virtualization technologies such as stackable switches, Virtual Switching System (VSS), and Virtual Port-channel (vPC), although vCP does not really count since you still have two separate management points, have been created to solve this problem in the switching arena. Such technologies did not exist for routers until now with an introduction of NV Edge System in Cisco ASR 9000 series.
In this article, we will go through steps to configure a NV Edge System specifically on Cisco ASR 9001.