We performed a comparison between Cisco ACI and VMware NSX based on our users’ reviews in four categories. After reading all of the collected data, you can find our conclusion below.
Comparison Results: Cisco ACI is a solid, robust solution but can be complex to understand and manage for users not familiar with the Cisco ecosystem. VMware is considered a solution that is easy to learn and manage and offers great security with a distributed firewall. This added security and micro-segmentation make VMware NSX a trusted, complete value-added solution.
"The centralized configuration is its most valuable feature."
"Cisco's technical support team is very good."
"This product improved the way our company functions by enabling us to establish our goal of moving to a zero-trust model. That's how Cisco ACI helps us the most."
"Cisco ACI is scalable and easy to expand."
"Once we have it running, it should be easier for us to program our IT rather than going case-by-case, by switches and different elements, or program it by hand."
"The initial setup was pretty straightforward. We just moved from one platform to another."
"This solution allows you to do everything quicker and more efficiently."
"One significant attraction for clients in Iran is the robustness of multicast solutions, which has been a major driver for them to migrate to Cisco ACI."
"The most valuable feature is the ability to create, develop, and deploy servers in minutes to hours, rather than days."
"It's a beneficial tool."
"The Distributed firewall is simple to add to the network and rules are easy to implement."
"The most valuable feature of VMware NSX is the ability to set up virtual networking environments."
"Though I haven't been working a lot on VMware NSX, it's good to have. What I like the most about it is that its console is good, and it doesn't take a lot of effort in terms of doing my daily tasks on it or what it's meant for. VMware NSX is still a preferred product in the market."
"I have found the solution to be stable."
"I have found the system to be very intuitive, functional, and they have great technology."
"VMware NSX offers some of the best features for security, such as micro-segmentation."
"We would like to have faster services and problem monitoring for our customers."
"From my point of view, troubleshooting issues relating to ACI can be a little bit complicated to perform."
"Before version 5, you could manage your firewall or load balancer from the AP. It was very basic and now they removed the whole features in the new version, so you cannot manage your load balance or firewall from your AP on L2, L4, and L7 services."
"I believe there's room for improvement in terms of ACI's integration with various technologies."
"We had issues in the first deployment when we tried to finish the migration from traditional networking to Cisco ACI."
"I wish that if I had to open up an additional tab, I wouldn't have to log in every single time."
"Where there is room for improvement from ACI is for Layer 2 and Layer 7 packages. Normally, when you're updating your ACI fabric or you're introducing new Layer 4 to Layer 7 devices, there are some constraints, there are some limitations... When you are doing device packages you will not have the functionality of ASM. It's like WAF, web application firewalls. So you need to configure it manually."
"There should be an alternative "ACI Light" solution for smaller-sized enterprises."
"The setup of the solution could be simplified."
"Going through and getting more features sets from the routing protocols is definitely necessary for the future."
"In the future, the solution should be compliant with internet NIC."
"We would like tenant segmentation available in future releases."
"If you're worried that NSX is too complex, I would tell you to take another look. If you compare NSX to a similar solution you might find it to be a bit more complex. Usually, the guy that comes in to implement NSX isn't the network guy and will lack the knowledge for the program. He can lack the knowledge for this program and will therefore think it's complex. You need somebody with network experience."
"The scalability is not perfect."
"The first time setting it up was difficult."
"The solution could benefit from improvements in its pricing and scalability."
Cisco ACI is ranked 1st in Network Virtualization with 96 reviews while VMware NSX is ranked 2nd in Network Virtualization with 93 reviews. Cisco ACI is rated 8.0, while VMware NSX is rated 8.0. The top reviewer of Cisco ACI writes "Stable, easy to extend, scalable, and has a host-based routing feature". On the other hand, the top reviewer of VMware NSX writes "Allows for seamless micro-segmentation and the support is exceptional". Cisco ACI is most compared with Cisco Secure Workload, Akamai Guardicore Segmentation, Nuage Networks, Juniper Contrail Networking and HPE SDN, whereas VMware NSX is most compared with Nutanix Flow Network Security, Illumio, Akamai Guardicore Segmentation, Cisco Secure Workload and Cisco DNA Center. See our Cisco ACI vs. VMware NSX report.
See our list of best Network Virtualization vendors and best Cloud and Data Center Security vendors.
We monitor all Network Virtualization reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.
There are some very major differences between both the Products and to name a few.
-Cisco ACI have physical network gear (9K Switches) where the Code runs in ACI Policy Mode & the UCS server where APIC software runs.
-VMware NSX doesn't have any physical network gear of its own, VMware NSX software runs on ESXi hosts(Any Vendor) & even NSX Bare Metal Edge runs on any Vendor hardware(check compatibility)
-Cisco ACI offers both Underlay & Overlay functionality
-VMware NSX is a software and it builds an Overlay tunnel for (VM/Container) communication on top of an already established IP network which can be build on hardware network gear (Cisco Legacy/ACI/Juniper etc.)
-Cisco ACI: To use micro-segmentation on a VM or Container level you will need some other Cisco products
-VMware NSX: Micro-segmentation can be done Out of the Box because DFW Distributed Firewall are applied on the vnic of a VM i.e. on the ESXi kernel.
Being different in many manners but they still define the SDN realm with L2-L7 Network services and what you choose over the other may depend on many other factors like what network gear you already have or if its Green or Brownfield deployment. For example if your infra already have something other than Cisco 9K switches and is well configured then it will make more sense to use NSX to make use of all the SDN functionalities. This is just an example not a recommendation.
Once you know your way around the Cisco ecosystem, using Cisco ACI is not so difficult. It is a global product, so when you change one interface, changes are automatically reflected on every switch. Cisco ACI can connect with both virtualized networks and physical networks.
As with many Cisco solutions, Cisco ACI has a steep learning curve. It is not user-friendly and most of our team would like to see a better GUI. It would be great if we could test upgrades in a simulation before implementing; this could save a lot of rework and downtime.
The key component for us with VMware NSX is the distributed firewall. VMware NSX can segment every application and server based on the ports with which they need to communicate. We can activate the ports we need and disable the ones we don’t. This really helps to keep things very secure and makes VMware NSX very flexible.
We would like to see VMware NSX integrate better with other open-source solutions; integration can be very complex leading many to simply choose not to use VMware NSX at all. We found some maximums can be very limiting, especially with very large environments. VMware can only be used with virtualized networks.
Conclusion:
Cisco ACI and VMware have many similar qualities and features. The fundamental difference is that Vmware NSX’s primary focus is on virtualized networks, while Cisco ACI can connect to both virtual and physical networks.
Vmware NSX can provide better levels of granularity and visibility into how your workload performs and functions. Cisco ACI does not provide this.
Because Cisco ACI is more robust and can handle both physical and virtual networks, Cisco ACI might be a more appropriate solution. At the end of the day, it really depends on your organization’s ecosystem and applications, features and utilities needed, and, of course, cost of implementation. You may need one of these solutions or both.