The tool's scalability depends only on the design you are opting for when designing some network. It is not with the vendor or the principal. It is the design that we are doing. In the recent scenario where we have a software-defined data center, like Cisco ACI and Huawei SDN, I would say that both can handle large data centers. It all depends on the design, the type of devices, the capacity, and what capacity planning we consider when designing the network. The equipment from Huawei and Cisco in my organization is not for an end user. The tool is to provide network connectivity for end users. We have different products. I don't exactly have a number to explain how many end users are connected via Huawei and Cisco.
