It's been almost a year since Cisco publicly unveiled its Application Centric Infrastructure (ACI). As we've noted in the past, ACI had to overcome a number of preconceived notions about Software Defined Networking (SDN), and without some detailed explanation, it was hard to get your head around how ACI worked and how it related to SDN. As we continue to clarify the message, there are still a number of ACI myths running around out there that we have to spend a good amount of time dispelling, so I thought I'd summarize them here. (Like Centralized Policy Management, Centralized Myth Handling can lead to greater efficiency and increased compliance. :-)).

1.     MYTH:  Cisco has limited software expertise and can't deliver a true SDN solution because ACI requires Cisco switches (hardware) as well as the APIC controller (software).
REALITY:Cisco believes data centers require a solution that combines the flexibility of software with the performance and scalability of hardware. ACI is the first data center and cloud solution to offer full visibility and integrated management of both physical and virtual networked IT resources, all built around the policy requirements of the application. ACI delivers SDN, but goes well beyond it to also deliver policy-based automation.

2.     MYTH: ACI requires an expensive "forklift upgrade"-Cisco customers must replace their existing Nexus switches with new ACI-capable switches.
REALITY:ACI is actually quite affordable due to the licensing model we use and because customers can extend ACI policy management to their entire data center by implementing a "pod" with a cost-effective ACI starter kit. On July 29, Cisco announced four ACI starter kits which are cost effective bundles that are ideal for proof-of-concept and lab deployments, and to create an ACI central policy "appliance" for existing Cisco Nexus 2000-7000 infrastructure to scale out private clouds using ACI. Customers who compare ACI to SDN software-only solutions discover that operational costs, roughly 75 percent of overall IT costs, are substantially lower with ACI - so the total cost of ownership is compelling. Along with the fact that the existing network infrastructure can still be leveraged.

3.     MYTH:  The ACI solution is not open; Cisco doesn't do enough with the open community. 
REALITY: Openness is a core tenet in ACI design. We see openness in three dimensions: open source, open standards, and open APIs. This naturally fosters an open ecosystem as well. Several partners like F5 and Citrix already are shipping device packs for joint deployments. Customers experience tremendous benefits when vendors come together to provide tightly integrated solutions engineered to work together out of the box.

ACI is designed to operate in heterogeneous data center environments with multiple vendors and multiple hypervisors. ACI supports an open ecosystem covering a broad range of Layer 4-7 services, orchestration platforms, and automation tools. One of the key drivers behind this ecosystem is OpFlex, an open standards initiative that helps customers achieve an intelligent, multivendor, policy-enabled infrastructure. Additionally, through contributions to OpenStack Neutron with our Group-Based Policy model, we are offering a fully open source policy API available to any OpenStack user. Cisco is also working with open source Linux vendors like Red Hat and Canonical to distribute an ACI Opflex agent for OVS, and contributing the Group-based Policy model to Open Daylight.

4.     MYTH: Customers want SDN solutions for their data center networks, but ACI is not an SDN solution.
REALITY:  We believe that SDN or even software defined data centers are not the sole results customers are looking for -it is the policy-based management and automation provided by ACI that delivers tremendous benefits to application deployment and troubleshooting-and provides a compelling TCO by cutting operational costs.  Channel partners agree with us:  a recent study by Baird Equity Research surveyed 60 channel solution providers and found that they would recommend the Nexus 9000 portfolio and ACI to their customers.

5.     MYTH:  Cisco can't compete against cheap commodity "white box" switches -they are the future of data center networks.  
REALITY: The truth is that only a handful of companies can effectively deploy white boxes because they require a great deal of operational management and troubleshooting, which is more expensive than the upfront costs of non-commodity hardware. Deutsche Bank published a report last year titled "Whitebox Switches Are Not Exactly a Bargain" which explains how the total cost equation changes when you take into account operational costs. In addition, white boxes don't include the rich features and capabilities that most companies want. Channel solution providers know this very well. The same Baird Equity Research study of 60 channel solution providers cited above indicated that only 2% would recommend NSX running on white-box or non-Cisco networking gear.

In the data center, "one size does not fit all", so Cisco offers a variety of switch configurations to match customer needs. For example, customers can start with merchant silicon-based line cards and migrate to an ACI environment with ACI-capable line cards and APIC, if and when they wish.

BOTTOM LINE:  We believe that Cisco will continue to win with our partners in the data center by delivering innovation through a highly secure and application centric infrastructure.  Through training, support, and new certifications, we are empowering over two million networking engineers and thousands of channel partners worldwide to succeed with ACI in the data center and cloud.