At Cisco live last month I spent several days talking to a lot of customers about all the new enhancements to our Nexus 1000V portfolio, especially the programmable virtual network overlays that are part of the Cisco ONE framework for SDN/network programmability. While the Nexus 1000V-based virtual networks are really gaining traction (6,000+ Nexus 1000V virtual switch customers to date), I still found a lot of folks weren’t all that familiar with the concept of VXLAN, and why they are so important to building scalable cloud networks and multi-tenant data centers.
Well, not to fear, VXLAN MAN is here! Well, not really, but we have just released a great new fundamentals video on VXLAN from the creative geniuses at Techwise TV (Thanks to @JimmyRay_Purser and @robbboyd!). We’ve gotten great reviews on this so far, and I know the guys really had a fun time in creating this one.
ESG points out that virtual network overlays are important to building out multi-tenant environments like private and hybrid clouds, as well as overcoming scalability issues in those environments that have traditionally been based on VLANs. As ESG notes, and as Cisco mentioned in it’s ONE announcement, programmability of the virtual networks is what really separates them from classic overlays based on MPLS or GRE tunnels. The Nexus 1000V will achieve this programmability capability by SDN API’s such as OpenStack on top of the Nexus 1000V virtual supervisor module.
Part of the interest in programmatic interfaces is fueled by the desire to logically centralize network control functions. A global view of network state can have many benefits but it does not preclude the use of distributed protocols within the network. Network Programming Interfaces (NPIs) provide a facility to construct global state, mutate that state and distribute that state to the network which in combination with distributed protocols can aid in achieving greater network efficiencies, improve visibility, robustness and add to the value of the network overall. When used the right way, these NPIs will help set a new balance between centralized and distributed control. Key to this balance will be domain or deployment specific constraints. Read More »
As promised, here is the registration link for the first of the two new Virtual Symposia this month. For those of you not familiar with the Virtual Symposium concept, check out this post for the long explanation--the short explanation is that its a 60 min panel discussion driven by your questions on a topics that we see generating a lot of questions.
The standard panel consists of yours truly, Greg Ferro (EtherealMind), Stephen Foskett (Tech Field Day), and Ivan Pepelnjack (ipSpace), then for each event, we add other folks we think you’ll want to hear from.
Virtual Symposium 3: Network Programmability and SDN
We decided to take advantage of the fine collection of smart people running around at CiscoLive in San Diego, and tape another in our Virtual Symposia series. This one was a bit different than in that we started with a Cisco-specific seed topic and we did not take live Q&A due to the logistics of being live and onsite at CiscoLive.
I think the show turned out well--we have a wide ranging discussion on not just the Cisco ONE announcement but also SDN, network programmability and implications for networking folks.
This wide-ranging discussion touched on a number of topics:
Contrasting Cisco’s ONE strategy with SDN and OpenFlow in general
APIs, OpenFlow, and XML
What will people do with SDN in the future?
Distributed and autonomous versus centralized
Standards: IEEE vs. IETF, de facto and interoperability
As I noted last week, we will be hosting Virtual Symposia #3 (more on network programmability) and #4 (VM networking) later this month. I should have the registration links up tomorrow. We have a killer panel coming together and we will once again have most of the show dedicated to audience Q&A, so I hope you can join us for those.