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What’s new in vSphere 5.1 part 5 September 25, 2012

Posted by vbry21 in VMware blogs.
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In VMware vSphere 5.1 we get a more advanced version of the distributed virtual switch. The new features enable us to manage our virtual switch infrastructure with greater efficiency and management enhancements.

Rollback and recovery addresses the challenges that we faced when management network failure caused the Hosts to disconnect from the vCenter Server.

The management network is configured on every host and is used to communicate with VMware vCenter as well as to interact with other host during vSphere HA configuration. This is important when it comes to centrally managing hosts through vCenter Server. If the management network on the host goes down or there is a misconfiguration, VMware vCenter can’t connect to the host and thus can’t centrally manage resources.

The Automatic rollback and recovery feature of vSphere 5.1 addresses all the concerns that customers have regarding the use of management network on a distributed virtual switch. This feature automatically detects any configuration changes on the management network and if the host can’t reach the vCenter Server, it doesn’t allow the changes to take effect by rolling back to previous valid configuration.

The rollbacks are of two types:

Host networking rollbacks: It occur when an invalid change is made to the host networking configuration. Every network change that disconnects a host also triggers a rollback.

Distributed switch rollbacks: It occur when invalid updates are made to distributed switch-related objects, such as distributed switches, distributed port groups, or distributed ports.

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