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Tag Archives: network virtualization

Physical Networks in the Virtualized Networking World

[This post was co-authored by VMware's Bruce Davie and Ken Duda from Arista Networks, and originally appeared on Network Heresy]

Almost a year ago, we wrote a first post about our efforts to build virtual networks that span both virtual and physical resources. As we’ve moved beyond the first proofs of concept to customer trials for our combined solution, this post serves to provide an update on where we see the interaction between virtual and physical worlds heading.

Our overall approach to connecting physical and virtual resources can be viewed in two main categories:

  • terminating the overlay on physical devices, such as top-of-rack switches, routers, appliances, etc.
  • managing interactions between the overlay and the physical devices that provide the underlay.

The latter topic is something we’ve addressed in some other recent posts (herehere and here) — in this blog we’ll focus more on how we deal with physical devices at the edge of the overlay. Continue reading

Geneve, VXLAN, and Network Virtualization Encapsulations

In this post, Bruce Davie and T. Sridhar of VMware’s Networking and Security Business Unit take a look at a proposed a new encapsulation protocol that would standardize how traffic is tunneled over the physical infrastructure by network overlay software.

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For as long as we’ve been doing Network Virtualization, there has been debate about how best to encapsulate the data. As we pointed out in an earlier post, it’s entirely reasonable for multiple encapsulations (e.g. VXLAN and STT) to co-exist in a single network. With the recent publication of “Geneve”, a new proposed encapsulation co-authored by VMware, Microsoft, Red Hat and Intel, we thought it would be helpful to clarify a few points regarding encapsulation for network virtualization. First, with all the investment made by us and our partners in developing support for VXLAN (described here), we very much intend to continue supporting VXLAN — indeed, we’ll be enhancing our VXLAN capabilities. Second, we want to explain why we believe Geneve is a necessary and useful addition to the network virtualization landscape.

Read the rest of Bruce’s blog on the Office of the CTO blog here.

Juniper and VMware: Collaborating to Enable The Software-Defined Data Center

The need for businesses to enhance the efficiency of IT and increase application agility is overwhelming. Embracing operational models such as cloud computing helps, but in order to fully leverage these new models companies must explore new ways of handling network connectivity. Network virtualization solutions such as VMware NSX provide an answer for the new cloud-centric networking models. As with any technology, though, network virtualization doesn’t solve some existing challenges by itself: consistent, efficient performance for business-critical applications that span virtual and physical worlds; correlated and integrated management; and enhancing data sharing between the network virtualization solution and the underlying physical network are all critical elements to successful cloud deployments. To address these challenges, we are pleased to announce that Juniper and VMware are expanding our partnership to help our joint customers achieve better application agility for their cloud environments. Continue reading

The Goldilocks Zone: Security In The Software-Defined Data Center Era

Last week, we spoke at the RSA Conference about a new concept in security – the Goldilocks zone.  With the help of Art Coviello, Executive Chairman of RSA, Chris Young, senior vice president and GM of Cisco’s Security business unit, and Lee Klarich, senior vice president of product management from Palo Alto Networks, we departed from the typical discussions about new controls or the latest threats.  We took the opportunity to lay out what we believe is a fundamental architectural issue holding back substantial progress in cyber security, and how virtualization may just provide the answer. The growing use of virtualization and the move towards software-defined data centers enable huge benefits in speed, scalability and agility; those benefits are undeniable. It may turn out, however, that one of virtualization’s biggest benefits is security. Continue reading

VMware at RSA Conference 2014 (#RSAC)

Summary:logo_rsac

  • Company outlines vision for security in the Software-Defined Data Center
  • Product and partner demonstrations in Booth #1615 to showcase growing security portfolio
  • New PCI-DSS 3.0 and FedRAMP reference architectures to be presented

Throughout its history, RSA Conference has consistently attracted the world’s best and brightest in the security field, creating opportunities for attendees to learn about IT security’s most important issues through first-hand interactions with peers, luminaries and emerging and established companies. Continue reading

Deploying VMware NSX with Cisco UCS and Nexus 7000

VMware NSX network virtualization software makes it possible for IT organizations to obtain new levels of business agility, allowing you to deploy advanced policy based network services for your applications as quickly as a virtual machine, today, leveraging your existing physical network infrastructure or next generation network hardware from any vendor.

Back in September, I wrote about the value of deploying the VMware NSX network virtualization platform on Cisco UCS and Nexus infrastructure. We had an overwhelming amount of customer response and request for more content about this deployment scenario. As such, we’ve created a new design guide which you can download here that describes a simple and straight forward example of how to deploy VMware NSX for vSphere on an infrastructure consisting of Cisco UCS and Nexus 7000 series switches. This basic guide should serve as a starting point from which to tailor a design for your specific environment.

We want to offer our thanks to the content creation team here at VMware for collaborating on this effort:

• Dmitri Kalintsev
• Bruce Davie
• Ray Budavari
• Venky Deshpande
• Nikhil Kelshikar
• Rod Stuhlmuller
• Scott Lowe
• Marcos Hernandez
• Chris King

Cheers,
Brad

Elephant Flow Mitigation via Virtual-Physical Communication

Note: this post was developed jointly by Justin Pettit of VMware and Mark Pearson of HP, with additional content from VMware’s Martin Casado and Bruce Davie.

A recent Network Heresy post “Of Mice and Elephants” discussed the impact long-lived flows (elephants) have on their short-lived peers (mice).  A quick summary is that, in a datacenter, it is believed that the majority of flows are short-lived (mice), but the majority of packets are long-lived (elephants). Mice flows tend to be bursty and latency-sensitive, whereas elephant flows tend to transfer large amounts of data, with per-packet latency being of less concern.  These elephants can fill up network buffers, which can introduce latency for mice.

At the HP 2013 Discover Conference, HP and VMware demonstrated a technology preview of detecting and handling elephant flows in an overlay network. The demonstration featured the joint HP-VMware solution announced at VMworld 2013.  VMware NSX provided an overlay network using HP switches as the underlay along with the HP VAN SDN controller. Through controller federation interfaces, the overlay and the underlay co-operated to mitigate the effects of the elephant flows on the mice. The solution shows the power of integration between network virtualization and SDN solutions. Continue reading

Distributed virtual and physical routing in VMware NSX for vSphere

NOTE – this post originally appeared on Bradhedlund.com

This post is intended to be a primer on the distributed routing in VMware NSX for vSphere, using a basic scenario of L3 forwarding between both virtual and physical subnets. I’m not going to bore you with all of the laborious details, just the stuff that matters for the purpose of this discussion. Continue reading

Network Security: The VMware NSX Network Virtualization Platform’s Hidden Gem

This week, we announced a new joint solution with our partner Palo Alto Networks that will

Best-In-Class Partners

automate and accelerate the deployment of next-generation network security with centralized management across physical and virtual domains. You can read the full announcement about the forthcoming integrated solution from our companies in our press release here.

For most data center operators, the idea of achieving the operational model of a VM for their data center networks is a top of mind benefit associated with the VMware NSX network virtualization platform. Through this model they can gain greater agility, efficiency and provisioning speed while reducing complexity as they implement a software-defined data center architecture. An often-overlooked feature set, fundamental to VMware NSX, is network security. Continue reading

VMware @ OpenStack Summit Hong Kong

Next week in Hong Kong, the VMware team will have a major presence at the OpenStack Summit, and we have an ever-growing presence on the agenda of speaking sessions and demos. As we did with the Portland show, he is a show planner with a schedule of all the VMware sessions. Here’s a snapshot of what you can expect (and experience) at the show. Continue reading