One of the ways a network engineer is able to collect the data for their tools is a SPAN port or TAP. However, even with many TAPs or SPAN ports, there still may not be enough critical network links that appliances can use.
Data Centers are growing exponentially and, as a result, network managers have to find faster solutions to keep up with the increase of data sharing. Migration strategies to fulfill these faster speeds, such as server upgrades, are becoming very complex and network administrators need to reduce the intricacies of the network. To preserve the quality of service on these networks, more and more tools are being added to ensure that performance is acceptable for the quality of experience (QoE) for the users. While supporting these new appliances, network administrators will still need to maintain and support the older generation of appliances, which create complex network architectures.
When designing new networks, one must have a strategic approach that is not only acceptable now, but will also prepare the network for changes down the road.