Cisco NX-OS

Cisco NX-OS

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Score 8.2 out of 100
Cisco NX-OS


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What is Cisco NX-OS?

Cisco NX-OS is a network operating system presented as a solution to help network operations move at the speed of business, with comprehensive automation, extensive visibility, and flexible open architectures for data center networks. NX-OS is the network operating system for all fabric…

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Product Details

What is Cisco NX-OS?

Cisco NX-OS is a network operating system presented as a solution to help network operations move at the speed of business, with comprehensive automation, extensive visibility, and flexible open architectures for data center networks. NX-OS is the network operating system for all fabric architectures, from traditional L2/L3 to overlay-based fabrics.Cisco NX-OS powers the modern data center.

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What is Cisco NX-OS's best feature?

Reviewers rate Performance highest, with a score of 8.3.

Who uses Cisco NX-OS?

The most common users of Cisco NX-OS are from Enterprises (1,001+ employees) and the Information Technology & Services industry.

Reviews and Ratings




(1-13 of 13)
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Olivia Sarr Mathews | TrustRadius Reviewer
Score 7 out of 10
Vetted Review
Verified User
Review Source
My experience with Cisco NX-OS dates back to about five years ago, using it to prevent network outages and optimization of networks. My team uses the software to gain visibility into network data and ASIC telemetry. We have integrated Cisco NX-OS with other DevOps automation tools to simplify all NX-OS programming.
  • Configuration is easy because it uses standard APIs.
  • Cisco NX-OS has a flexible architecture for all scalable workloads.
  • Performing segment routing is quite simple.
  • Vulnarable to attacks if not used along a SOAR or SIEM software.
Cisco NX-OS is probably the best way to build a reliable data center network to prevent downtimes. While other solutions provide only the basic SRv6 architectures for networks, Cisco NX-OS goes an extra mile to help enable Data Center interconnection (DCI) with your WAN to tone down on the network complexity. NX-OS from Cisco would also bring in more flexibility on how you manage your networks and scale more easily.
Up to now, we haven't had a major ground-shaking attack on our networks but we take no chances by using NX-OS alongside a SIEM. All endpoints and workloads are secure so I would say we have plenty of trust in their security model.
Score 9 out of 10
Vetted Review
Verified User
Review Source
This Cisco NX-OS switches were used as main switches by my client. It solved the business points like providing high performance in its job. EIGRP and VXLAN were configured on these without slowing down their performance. This NX-OS operating system run switches are mature enough and these NX-OS switches run for long durations without any issues.
  • A highly matured Cisco NX-OS operating system.
  • Provides high performance.
  • Runs longer duration with less issues.
  • Few bugs with intel chipsets were noticed.
  • None apart from this were observed.
Ease of use and learning is easier. The documentation for CIsco NX-OS is very good as it was in the market for many years. There are very good case scenarios and wiki pages written by well-experienced experts. These pages will provide quick resolution techniques for the most occurring frequent problems and misconfiguration issues.
Security is top-notch in this NX-OS switch. This may not be as good as a dedicated firewall but for a switch, this one provides good security features within it.
Rahim Khan | TrustRadius Reviewer
Score 9 out of 10
Vetted Review
Verified User
Review Source
Cisco NX-OS starting was very easy and effective through its clean, professional interface full of multiple and very functional components. Ability on networking and network monitoring Cisco NX-OS is among the best solution and its reports are reliable and easy to provide. Management of various operations this tool was the best and very responsive features with various capabilities.
  • Easy to manage different networks.
  • Performance and problem identification.
  • Excellent reporting Cisco platform.
  • To monitor different network with the package is not that easy.
  • Multiple issues management.
  • Setting advanced functionalities on Cisco NX-OS is a complex process.
This easy solution can be a great help for the big companies on easy multiple data processing and effective networking solutions for the various departments and also generating the real-time data reports with Cisco NX-OS is excellent. For the new users, it takes no time to become a pro on full manipulation of the features and offer the best and quality management services.
Highly secure networking environment and effective data collection platform and the best services Automation tool. Through this Cisco platform, data protection is on top and all the operations are managed securely from this single network performance management system with a secure management environment and also its data analytics production is excellent.
Veronica Derrick | TrustRadius Reviewer
Score 9 out of 10
Vetted Review
Verified User
Review Source
Reliable Cisco platform that improves the performance of the network and easy to implement the platform with high-performance functionalities. With this solution is quite easy to stretch VLANs and enhancement of multiple business operations and also a very effective Automation platform and easy data analytics and also a very secure platform.
  • Effective network operations management tool.
  • Data securing system.
  • VLANS stretching.
  • The training is not easy.
  • Technical support should be more available.
  • Implementation of the software at the first time.
Cisco NX-OS offers excellent capabilities for performance acceleration and easy to manage multiple business network operations and a very secure environment that provides multiple different features and is very easy to get started. Cisco NX-OS offers capabilities on easy use of API which allows effective interaction with the OS and configuration is very easy.
Excellent security is offered by the network operating system and the best power with effective scalability. Easy on security configuration and setting. Performance is also the best and very cost-effective and the data management capabilities are a very high and reliable tool that gathers all the network operations control in one room.
Score 9 out of 10
Vetted Review
Verified User
Review Source
We are using the Nexus family switches as our main core switches within the datacenter. It's used in all our major sites which are hosting datacenters. We are mainly using the Nexus 7K and Nexus 5K across our organization. It's [a] very powerful and very reliable product to be used as core switches
  • High performance
  • [Cisco] NX-OS CLI is smarter than IOS
  • Lots of features
  • The price is quite high
  • Sometimes upgrades can be tricky to proceed
The Cisco Nexus and [Cisco] NX-OS are really well designed for datacenter purposes. It's doing VDC so you can split a single physical box into multiple logical (in cases of multi-customer environments, for instance). The FEX Nexus 2K [is] really easy to configure and to be associated with Nexus 5K and doing high-performance work.
We didn't increase the security too much. At least we enable the default features, but I know that we can do better than that on this topic, but [there's a] lack of time.
Score 10 out of 10
Vetted Review
Verified User
Review Source
The Cisco NX-OS is a very good IOS software by Cisco. We are controlling all the necessary things using this OS. It is easy to work and administrate. It is easy to configure these NX-os moreover if you face any issues we can every time reach out to Cisco for help and support. overall a very good product.
  • easy to configure
  • easy to configure and deploy the VPC technology
  • easy of administering the NX-os and overall easy configuration and support available
  • For us it is avery wornderful journey using NX-os
  • we haven't come across any issues to have any change in function
  • we are happy with the prodct and it is fullfling our needs regularly
The software NX-OS is a very good IOS developed by Cisco. It is very easy to configure and administrate these NX-OS devices. A lot of improved and high availability HA on the NX-OS. A lot of features and added advantages while we use the devices which have NX-OS. overall we are very happy with the product and we recommend it to all to start using.
the product is safe to use and the IOS is upgraded by ciso whenever there is an vulnerability found out. we are see this tool as one of the best tool and it also support security features like port and ACL etc. the NX-os have even the capability of firewall. we will need to enable the module and we are good to use it . the firewall feature does a good job by filter the unwanted traffic.
Score 7 out of 10
Vetted Review
Verified User
Review Source
Cisco NX-OS is used on some Nexus switches in our datacenter. These switches connect to both blade enclosures and individual servers, all of which contain virtual machines. The Nexus switches have the ability to connect to servers with 10GbE and can also converge Ethernet and FibreChannel on a single cable hence simplifying the data centre layout.
  • Commands to combine Ethernet and fibre channel are very useful
  • The ability to use APIs to interact with the OS
  • Being used to Catalyst iOS the change in some commands gets annoying
  • It also came with a new license model compared to iOS devices
Cisco NX-OS is designed to run on data centre switches, and for me the key benefit is the ability to merge Ethernet and fire channel management into a single switch hence reducing cabling and management. However we don't require fibre channel at present so these are just being used for the fact they offer 10GbE on every port, which is still a useful feature in the data centre core.
Given we don't use the fibre channel features, having to learn the difference in commands from iOS is a little frustrating at times.
Security is something I know Cisco take seriously and there are many security features across all their devices. I don't think features like zero-trust are enabled by default though, so it does require reading the relevant guide and applying commands that suit your environment which can mean the implementation is not always as robust as intended.
Score 9 out of 10
Vetted Review
Verified User
Review Source
Cisco NX-OS is being used on core Nexus switches to tie together closets as well as tie in VM infrastructure. It is being used across the organization. Cisco NX-OS provides resilience to our infrastructure, because we have all closets tied into both Nexus switches. It also provides VPCs which are helpful with resilience.
  • In-service software upgrade
  • Non-stop forwarding
  • Virtual Port Channels
  • We had some issues with FCoE initially that we got resolved later on.
Cisco NX-OS is an excellent option for a core switch if you need solid resilience. It provides a solid level of security for a core switch as well. If you aren't going to be running multiple connections from wiring closets or VM infrastructure then a less pricey option would be recommended unless you need the port bandwidth. Personally I think the VPC functionality within NX-OS is relatively easy to use and works well.
This obviously wouldn't replace a firewall, but for a core switch it supports plenty of security features that you may not see in other platforms. I would recommend NX-OS if you are looking for a secure core switch.
October 22, 2020

Cisco NX-OS Review

Score 9 out of 10
Vetted Review
Verified User
Review Source
We are using Cisco NX-OS for the operating system of our Nexus switches. We are using it for multiple purposes, one of them as a Data Center core switch, which is used to connect all our servers, storage, and systems. We also use it as a core switch for remote sites.
  • Easy to use
  • Running as separate control plane
  • Great performance on switches
  • No DHCP server available on it
  • No VTP server available on it
Due to the separation of features and the ability to enable each feature when you need it, using Cisco NX-OS decreases the processing on the switch and the memory use as well. The switches become more powerful and can handle much more traffic and sessions than normal switches. The ease of commands makes it simple to use.
Score 9 out of 10
Vetted Review
Verified User
Review Source
Cisco NX-OS is used as the component of Fabric Interconnect in the Cisco UCS solution in our organization. The UCS is a core of infrastructure where unified communications services are hosted. The services that are running on top of the NX-OS are used across the whole organization. The main business problem solved is a single point of management and maintenance for the systems hosted on top of the NX-OS.
  • Core hosting for UCS software.
  • Unified Fabric enablement.
  • Visibility and centralized management.
  • Docker container support.
  • Native web interface.
  • Integration with DevOps tool.
One of the scenarios is to use in the DC network in the unified fabric, where automation plays a significant role. As NX-OS supports programming languages build in, the automation tasks can be run easily. It is also possible to integrate the DC network with DevOps tools. It is less appropriate to use it in the access switches in the DC.
Documentation and support is always very high quality.
NX-OS has many similarities with the traditional IOS which is quite beneficial when it comes to configuration and learning. As a native Linux system, there are a lot of tools and features that can be enabled for any use case.
September 10, 2020

NX-OS is Good but not Great

Ramesh K | TrustRadius Reviewer
Score 8 out of 10
Vetted Review
Verified User
Review Source
We are using the NX-OS in our data center across our organization. We use mostly use it to support layer2 requirements within the data center. We are facing memory leak issues and had to do software upgrades very frequently.
  • Cisco NX-OS is very simple to use and user friendly CLI
  • NX-OS has a modular config so easy to configure.
  • NX-OS comes up with copp policy where we can define most of our system level ontrols instead of defining separate ACLs
  • Memory leak issue is one of the major issues that need to be solved.
  • Burst traffic handling needs improvement.
  • The buffer size is too small and module-level issues will be repetitive.
We use Nexus 3Ks for switching in data centers where we host with 1G and uplink is 10G. This may not be appropriate where we need more host port throughput. NX-OS has a very simple design and CLI to use, but we need to have either reloads or code upgrades to fix the memory leak issues.
August 20, 2020

My Cisco NX-OS Review

John Patrick Duro | TrustRadius Reviewer
Score 8 out of 10
Vetted Review
Verified User
Review Source
We used Cisco NX-OS on our various Cisco Nexus 7000, 5000, 4000, and 1000V deployments. It is being used globally or across the whole organization. It resolves the following business problems we have:
1. Multiprotocol Label Switching (MPLS) - for centralization and administration of our connected departments.
2. Virtual PortChannel - we required to have Layer 2 multipathing without changing the existing deployments.
3. Software compatibility - we needed to have flexibility with other network OS.
  • Software compatibility
  • Virtual PortChannel
  • Multiprotocol Label Switching (MPLS)
  • Port profiles
  • Autolearn feature for network security configuration - it is not learning as expected and performance is poor.
  • Etheranalyzer - WireShark is more user friendly.
  • Locator/ID Separation Protocol (LISP) - it's too complex to set up.
It is well suited if you have full-blown Cisco solution deployments across the globe because of its compatibility with other Cisco species or technologies. Also, it has a lot of innovative functionalities that you will not find on other network OS from efficiency to security compliance to routing and management effectiveness. If you are looking for an all-purpose OS, go for it, but if you are just requiring specific services that can be found on other network OS, go for that because Cisco is not cheap.
Cisco support never fails me. In terms of timely response, no one is on par with them. They really value the impact of having technical issues and potential business stoppage. Also, their support staff are well equipped with knowledge and skills and easily resolve the most common incidents. Most of the time, we can resolve an issue by just calling them once.
Zar Jerome Cajudo | TrustRadius Reviewer
Score 9 out of 10
Vetted Review
Verified User
Review Source
Cisco NX-OS is being utilized by our customers as a CORE Switch on their organization. We deploy it via VPC to be able to have redundancy on the links. It addresses the problems of high traffic aggregated to your internal networks. Our customers are currently using Nexus 7000 but are currently migrating to Nexus 9000 because some N7K are now EOL.
  • High availability. VPC.
  • Very high density data capable hardware.
  • Advanced troubleshooting tools.
  • Supports OTV.
  • Few bugs on NX-OS
  • Minor differences in syntax (when compared to other Cisco devices).
  • Hard to keep the SW level bug-free.
Cisco NXOS is well-suited to our customers in financial institutions like banks and insurance companies. It gives high availability and supports a high amount of traffic, that's why it is well suited to be the core of banking technology. It is less appropriate for small and medium enterprises because of its cost.
I gave it an 8 because there are commands that are not known on NX-OS. Also, there are some software bugs found on NXOS.