Take the 2-minute tour ×
Network Engineering Stack Exchange is a question and answer site for network engineers. It's 100% free, no registration required.

I am looking at upgrading our wireless infrastructure from 60+ SOHO access points to an Enterprise level solution.

We are currently testing Ubiquity (have 12 in our most dense areas) and it seems to be doing exactly what we need it to do, but from all the research I have seen, people are suggesting controller based solutions.

What are the main advantages for going controller based (such as Aruba) versus non-controller/software based (such as Ubiquity)? If all we need is one configuration file for the entire network, would the Ubiquity access points be adequate or would we see a huge performance drop over something like Aruba?

share|improve this question

2 Answers 2

up vote 7 down vote accepted

While controller appliances are still sold, there are a number of trends that are becoming popular, among these cloud based solutions and virtualized solutions. While this is a bit off topic, there are also enterprise vendors looking at implementing SDN concepts in wireless...but that is another discussion and we have yet to see how that will play out.

Additionally, vendors are pushing more of what has been controller based "intelligence" to the access point, including roaming and policy enforcement decisions. This is largely a factor due to concerns about the potential bandwidth needs necessary to tunnel all the traffic from 802.11ac access points back to the controller. While the implementation is specific to vendors, this typically takes the form of a "control connection" between the controller and AP, while the data is dropped off directly from the AP to the local network.

Even so, there will continue to be a need for some sort of "controller" functionality in some form. For example, something to act as the NAS for 802.1X authentications. It simply doesn't make sense to configure each access point as a RADIUS client on your RADIUS server to function as a NAS individually.

No matter how the industry develops, no good enterprise class wireless system will exist without a management platform that will manage configurations, provide AP updates, and collect data to provide reporting and troubleshooting, so these aspects of controllers will also remain in some form.

You mention Aruba, but they also have non-controller based solutions, namely their "Instant Access Point" solution, which is cloud managed. While a newer offering, this is an example of a move away from the controller appliance model.

Cisco has acquired the Meraki cloud based solution to add to their product line. Aerohive runs either in the cloud or as a virtual appliance (also sold as a hardware appliance if you like).

Ubiquiti's solution provides a low entry point financially, but as with many things this comes at a cost even if it isn't in capital. The software they provide does take care of a number of these important factors, but only to a degree as they are not as fully featured as other vendors products and doesn't have as many configuration options (which can be important in a deployment). It also isn't nearly as polished a solution.

It is not my intent to knock Ubiquiti, it is a decent product. I have deployed it at several client sites.

Ultimately, you need to look at the features and performance you need/want to find the solution that fits your needs and budget best. There are many wireless vendors and only you can decide what is "right" for your organization. I would recommend calling and talking to several vendors as they will be happy to demonstrate their features and even let you evaluate their products. Keep in mind that they will all "market" their product as the best, so you will have to do some independent research to figure out which of their carefully selected feature highlights are mostly smoke and mirrors.

share|improve this answer

The often heard reason for wireless controllers is central management and accounting -- and the ability to inspect the traffic (read: enforce policy.) Ubiquity does something close to that with their UniFi system, but it's not a controller but more a management engine.

If all you need are a fleet of "zombie" APs -- all clones that no one need mess with, then there's no reason to go with a controller based system. This is made even more true by the cost difference.

share|improve this answer
    
So controllers provide the ability to inspect the traffic more closely? Isn't a firewall supposed to do this? –  AWippler Apr 2 at 22:51
1  
@AWippler, sure but a controller with policy enforcement capabilities can stop traffic you don't want from hitting your network at all. Without this, it would have to transit your network at least as far as the firewall. Some of them can also prioritize, police and shape traffic based on various characteristics as well. –  YLearn Apr 3 at 3:32

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.