Cisco Ships Its SDN Architecture -- Almost
Mitch Wagner, West Coast Bureau Chief, Light Reading
After talking it up since November 2013, Cisco is this week set to ship its version of SDN, the Application Centric Infrastructure (ACI).
Cisco Systems Inc. (Nasdaq: CSCO) announced ACI late last year as its response to the growing SDN movement, which, although still in its infancy, represents an existential threat to Cisco's business model due to its inherent reliance on white box switches. (See Cisco's ACI Gets Physical With SDN.)
ACI is Cisco's take on SDN. So what exactly is it? Thomas Schiebe, Cisco director of product management, reviewed ACI's components for Light Reading.
The first part of ACI is the Network Profile. Network Profiles are network configuration templates for applications and other workloads, as well as groups, security rules, and infrastructure. Using Profiles, the network is configured around behavior, rather than set rules created around the equipment's capabilities. It's a DevOps way of looking at the network, Schiebe says.
The second component is the Application Policy Infrastructure Controller (APIC), which is a database for profiles. Unlike an OpenFlow controller, the APIC doesn't control the switch directly; rather, it pushes policies out to switches, which control themselves. The APIC describes desired results, which the switch produces by controlling its own behavior.
The third component is the equipment: Nexus switches and other devices, as well as appliances such as firewalls and load balancers that are managed through the APIC.
So is ACI really part of the SDN revolution? Yes, says Schiebe. "SDN is an amorphous term. To me, SDN means 'software-defined,' not 'software-only.' We need to get away from box-by-box configuration to policy-defined configuration," he says.
And now ACI is available -- almost. Customers have been able to order ACI components since July 1, and they're scheduled to ship Thursday.
The APIC is available as software running on a Cisco UCS C-Series x86 rack server. Cisco decided to ship the software as an appliance to guarantee a good out-of-box experience, testing all dependencies and simplifying deployments, Schiebe says.
Cisco also offers fixed and modular spine switches, the Nexus 9446PQ and 9509, for up to 288 ports and 40 GBit/s per chassis, that support ACI.
And Cisco is offering several Nexus 9300-series leaf and top-of-rack switches, shipping since March, now available with ACI software in addition to the vendor's operating system, IOS.
Hardware pricing is the same for ACI as it is for IOS. Software licensing is per leaf switch, no matter what kind or number of servers the customer has attached to each switch. Cisco wants to avoid pricing uncertainty for customers with multiple virtual machines or other usage-based models. "We made pricing predictable and attractive so customers don't have to get scared about SDN pricing or traffic pricing," Schiebe says.
Pricing is $250,000 for a starter bundle with everything needed to set up a small fabric.
Cisco anticipates several use cases for the starter bundle: Some users will want a proof-of-concept or lab deployment. Others will use the bundle for a converged infrastructure, connecting the fabric to racks of pooled storage and compute. With ACI, users can power an entire data center, albeit a small one. And users can use the starter kit to extend ACI policy management to an existing infrastructure, to gradually make the transition to ACI,
Pure-play SDN advocates may well disagree with Cisco's claim that ACI is SDN. Companies including Big Switch Networks , Cumulus, and Pica8 Inc. are founded on running OpenFlow controllers on commodity hardware. That's also the basis of the networking strategies espoused by HP Inc. (NYSE: HPQ), VMware Inc. (NYSE: VMW), and Dell Technologies (Nasdaq: DELL). (See The Three Faces of SDN, Cisco & VMware Are Apple & Google of SDN, Big Switch Intros Flagship Big Cloud Fabric – At Last, HP Debuts SDN Management Software, Switches, and Open Season: Dell Taps Into Big Switch.)
Cisco is betting that it can deliver customers all the benefits of SDN without divorcing carriers and enterprises from Cisco's proprietary hardware. And Cisco has so much market share and momentum that it can succeed, so long as it maintains a high level of product and service quality. (See Cisco Asks the Killer SDN Question.)
In other words, Cisco could well win this bet as long as it doesn't screw up.