Earlier today Citrix announced the first public beta of a XenServer 5.6 Feature Pack 1 (codename Cowley). This is a significant release as it finally includes the Open vSwitch technology and the distributed virtual switching capabilities that come with it.
The early bits of Open vSwitch appeared online in August 2009, along with a technology roadmap that clears the intention to compete against the VMware vNetwork Distributed Switch architecture and the Cisco Nexus 1000V software switch. It took almost an entire year to reach version 1.0. Meanwhile Open vSwitch became a key component of the Xen Cloud Platform (XCP) networking infrastructure, another project supported by Citrix.
In the last few weeks Simon Crosby, CTO of the Data Center and Cloud Computing division at Citrix, spent some time to clarify the need for a more sophisticated virtual switch:
OpenFlow based virtual switches in each server can be logically pooled into a single fabric by an external distributed virtual switch controller to build a dynamic, multi-tenant, programmable datacenter fabric that supports key innovations in cloud computing, as well as allowing us to take advantage of standard x86 CPUs to run a set of rich edge packet-processing functions to secure, direct, filter and otherwise control the delivery of cloud based applications.
With the Open vSwitch in place, the Open Stack open source cloud orchestration layer will be able to exert direct control over the data center fabric to deliver a rich, enterprise ready network layer with powerful controls for security, multi-tenancy, load balancing, monitoring, compliance, charge-back and more.
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