6.5.1

Rollback and Recovery of the
Management Network 7
In vSphere 5.1 and later, you can prevent and recover from misconfiguration of the management network
by using the rollback and recovery support of the vSphere Distributed Switch and vSphere Standard
Switch.
Rollback is available for use on both standard and distributed switches. To fix invalid configuration of the
management network, you can connect directly to a host to fix the issues through the DCUI.
This chapter includes the following topics:
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vSphere Networking Rollback
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Resolve Errors in the Management Network Configuration on a vSphere Distributed Switch
vSphere Networking Rollback
By rolling configuration changes back, vSphere protects hosts from losing connection to vCenter Server
as a result from misconfiguration of the management network.
In vSphere 5.1 and later, networking rollback is enabled by default. However, you can enable or disable
rollbacks at the vCenter Server level.
Host Networking Rollbacks
Host networking rollbacks occur when an invalid change is made to the networking configuration for the
connection with vCenter Server. Every network change that disconnects a host also triggers a rollback.
The following examples of changes to the host networking configuration might trigger a rollback:
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Updating the speed or duplex of a physical NIC.
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Updating DNS and routing settings.
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Updating teaming and failover policies or traffic shaping policies of a standard port group that
contains the management VMkernel network adapter.
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Updating the VLAN of a standard port group that contains the management VMkernel network
adapter.
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Increasing the MTU of management VMkernel network adapter and its switch to values not supported
by the physical infrastructure.
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Changing the IP settings of management VMkernel network adapters.
VMware, Inc.
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