Sunday, March 1, 2015

When To Start Thinking of Virtualization ?


It's always a tough decision when to start thinking of Virtualization. But the best and optimum case of virtualization is when you have high CPU requirement but less IO requirements.






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Sunday, February 22, 2015

Which is best method to deploy VxLAN: Multicast or Unicast?


Before deploying VxLAN we have to consider it’s underneath deployment model. It could be multicast or unicast. Now the question arises which one is the best for the network. Should we go with Multicast which is as good as broadcast or unicast?

It should be noted that not all deployment types are supported by all devices both physical and virtual. Despite the available hardware and software the best deployment for a particular scenario often depends on the application that will run within the VXLAN. If the application is based on unicast connectivity, in that case unicast mode is preferable. However if you have very large VXLANS with thousands of VM’s on it with each VM being on a separate physical hypervisor then Multicast mode might be better suited.

If the application within a VXLAN relies heavily on either multicast or broadcast messages to keep hosts in sync then this might be a better use case for multicast mode If multicast heavy application is distributed between two physical hypervisors then multicast mode will see no efficiency benefit and unicast mode would be more efficient than multicast mode
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Wednesday, February 18, 2015

What is Network Functions Virtualization (NFV)


Network Operators’ networks are populated with a large and increasing variety of proprietary hardware appliances. To launch a new network service often requires yet another variety and finding the space and power to accommodate these boxes is becoming increasingly difficult; compounded by the increasing costs of energy, capital investment challenges and the rarity of skills necessary to design, integrate and operate increasingly complex hardware-based appliances. Moreover, hardware-based appliances rapidly reach end of life, requiring much of the procuredesign-integrate-deploy cycle to be repeated with little or no revenue benefit. Worse, hardware lifecycles are becoming shorter as technology and services innovation accelerates, inhibiting the roll out of new revenue earning network services and constraining innovation in an increasingly network-centric connected world.

Network Functions Visualization(NFV) aims to address these problems by leveraging standard IT virtualisation technology to consolidate many network equipment types onto industry standard high volume servers, switches and storage, which could be located in Datacentres, Network Nodes and in the end user premises. We believe Network Functions Virtualisation is applicable to any data plane packet processing and control plane function in fixed and mobile network infrastructures. NFV decouples the network functions, such as network address translation (NAT), firewalling, intrusion detection, domain name service (DNS), and caching, to name a few, from proprietary hardware appliances so they can run in software.

Virtualising Network Functions could potentially offer many benefits including, but not limited to:
1. Reduced equipment costs and reduced power consumption through consolidating equipment and exploiting the economies of scale of the IT industry.
2. Increased speed of Time to Market by minimising the typical network operator cycle of innovation.
3. Availability of network appliance multi-version and multi-tenancy, which allows use of a single platform for different applications, users and tenants. This allows network operators to share resources across services and across different customer bases.
4. Enables a wide variety of eco-systems and encourages openness.

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