Cisco Blogs


Cisco Blog > Data Center and Cloud

Nexus 1000V Responding to Scale Requirements with 10,000+ Ports per Virtual Switch

February 16, 2012 at 10:45 am PST

At Cisco Live London 2012, we announced that the Nexus 1000V distributed virtual switch (DVS) architecture will scale to support 10K+ ports across hundreds of servers.  This is a multi-fold increase over our current support of 2K ports and 64 servers.  What is driving the need to scale?  Two reasons: More VMs and broader VM mobility.

The number of VMs is growing leaps and bounds in data centers and cloud computing environments, which in turn is driving the need to scale virtual switch ports.  Depending on who you ask, we have already reached or are about to reach the tipping point where 50% of enterprise workloads have been virtualized.  In most IT environments today, you get a VM by default for computing needs; to run an app on a bare metal physical server requires special approval.  And needless to say, Moore’s Law continues to drive dense multi-core CPUs with extended memory architectures – thus enabling many more virtual machines to be instantiated on a single physical server.  We have seen UCS customers deploy 10 – 30 VMs per server for production workloads, and 50+ (in some cases 100+) VMs per server for non-production workloads and virtual desktops.  Increased adoption of public cloud computing resources, as well as growing deployments of private clouds in enterprises is also rapidly increasing the VM count.  Also, customers often assign multiple vNICs per VM, e.g. a NIC for data traffic, another for management, a third for backup and so on.  These factors are contributing to increased demand for virtual Ethernet (vEth) ports on the Nexus 1000V DVS. Read More »

Tags: , , , ,

DCI as an enabling framework for both Workload Mobility & Disaster Recovery using OTV and LISP

A couple of colleagues of mine wrote a  document on live Workload Mobility and Disaster Recovery for Tier-1 applications.   I think you should check it out and here’s a couple of key points that I want to highlight:

  1. A single physical Cisco, EMC, VMware infrastructure
  2. Both vMotion and SRM validated on same infrastructure
  3. Tier-1 Enterprise Applications tested

Read More »

Tags: , , , , , , , , , , , , , , , , , ,

FHRP – Egress Path Optimization from the Server to the Client

I previously discussed using LISP to optimize your client-server traffic so today I’ll discuss the reverse direction: Egress Path Optimization from the Server to the Client. Let’s go over the need for Path Optimization in the direction from Server-to-Client with some pictures and explanations.

The Virtual Machine (VM) server is configured with a default gateway IP address, 192.168.1.1, which is the next hop IP address that the VM will forward packets towards as the traffic returns to the client outside the data center.  In this data center environment, we’ve deployed the default gateway using the First Hop Redundancy Protocol (FHRP).  In reality, FHRP is an umbrella technology term that includes Hot Standby Routing Protcol (HSRP) and Virtual Router Redundancy Protocol (VRRP), two main technologies that provide transparent failover and redundancy at the first hop IP router.  Please see info on FHRP here.

Also notice that the VM default gateway is the same as the HSRP Virtual IP Address (VIP). The HSRP VIP binds itself to one of the physical HSRP Routers via an HSRP election process using Layer 2 control packets between the two physical HSRP Routers and this means that the VM default gateway, since it points to a VIP, may move between physical HSRP Routers, and of course which is then intent and design when using any type of FHRP.

In the above picture, the Path is Optimized from Server to Client, so now let’s take a look at what happens when we migrate the VM to the new data center.

Read More »

Tags: , , , , , , , , , , , ,

Best Practices for Application Delivery in Virtualized Networks – Part II

As we start off this New Year, how about including a resolution to improve application delivery? In Best Practices for Application Delivery in Virtualized Networks – Part I , we covered key application delivery challenges that have come up due to the complexities of managing the many types of applications that enterprises use today, and further complicated by data center consolidation and virtualization. We then covered some best practices, courtesy of Dr. Jim Metzler’s 2011 Application Service Delivery Handbook, which recommended taking a lifecycle approach to planning and managing application performance.

A key step to the lifecycle approach is to implement network and application optimization tools, such as WAN Optimization solutions and Application Delivery Controllers, including server load balancers. Of course, these solutions are not new to the market and already address many of the needs that exist with delivering enterprise applications in virtualized data centers -- namely, the need to ensure network reliability, availability and security for users accessing these applications. In this post, we will discuss a recent study by IDC, where IT decision makers across Europe and the US spoke out about their strategies for using server load balancers to deal with emerging challenges.



.                                                                                                                                                                                                                                                                                              What important attributes do you look for in your server load balancers?

Read More »

Tags: , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

VMworld Europe – Cloudy with a Cisco Lining

VMworld Europe is just around the corner and the final preparations are being completed.  The Bella Center, in beautiful Copenhagen Denmark, is undergoing a cloudy transformation that will tickle the technical fancy of geeks and provide answers and directions for the business minded.  The cloud has come to the Bella Center and it has a Cisco lining.

Cloud is changing the way we do IT and Cisco is leading the charge.  We have the products, innovation and partnerships to help you on your journey to the cloud.  Cisco can help you own the cloud.  Stop by our booth in the Bella Center to hear about some of these great Cisco solutions:

  • Cisco Intelligent Automation for Cloud: Cisco powered orchestration and automation tools, which are key component to a successful cloud initiative.  We will demo the software in action as it powers the internal Cisco private cloud CITEIS (Cisco IT Elastic Infrastructure Services).
  • Cisco Nexus 1000v:  Cisco’s award winning virtualized switch providing networking and security solutions for the data center.  Learn how the Nexus 1000v compliments VMware vCloud Director and delivers highly secure, multitenant data center networks

Read More »

Tags: , , , , , , , , , ,