Absolutely, these should be on topic. Please, this is not at all what is meant by "too localized." This close reason is being severely reworked because of these misunderstandings (more on that soon) — but it almost never makes sense to close a question because it pertains to a specific product.
Yes, questions about the products used in this subject space should be on topic. As a matter of fact, the developers of these products tend to have communities of their own. We should encourage them to become part of the ecosystem of this site.
We get a lot of requests from project teams about how they can use Stack Exchange to support their communities. I see no reason why this site couldn't provide fantastic technical support for products or services closely related to Network Engineering. I'm not talking about customer support issues (bug reports, feature requests, etc), but technical support for problems you encounter in the day-to-day use of these products.
This is really no different than the product-specific support we provide on Stack Overflow, and the top two answers from the link below are worth reading:
Is it okay to use Stack Overflow as the support forum for a product or project?