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Virtual machines with vNetwork Distributed Switch lose network connectivity after HA failover

Details

When VMware HA performs failover and restarts virtual machines on different hosts, the virtual machines that are configured with vNetwork Distributed Switch (vDS) might lose network connectivity.
This issue occurs with virtual machines that cannot persist their vDS port information (for example, virtual machines that are deployed from templates or other virtual machines, or virtual machines whose disk files are migrated using VMware Storage VMotion).

Solution

This issue is resolved in the vCenter 4.0 Update 2 release by ensuring that virtual machines correctly persist their vDS port information. However, this issue remains for the virtual machines that were a part of the inventory prior to upgrading to vCenter 4.0 Update 2.

To work around the issue, re-provision vDS networking for the affected virtual machines:

Delete the existing vDS virtual adapters.
Create new vDS virtual adapters by using vCenter Server 4.0 Update 2.

Alternately, reconfigure the virtual machine to move its network adapter from exitsing vDS to another vDS or to a Standard Virtual Switch portgroup, then reconfigure it to come back to the original vDS.

Note: This requires additional vDS or Standard virtual switch.

For information on deleting and creating vDS virtual adapters, see Configuring vNetwork Distributed Switch (vDS) Virtual Adapters (1010597).

Update History

10-20-2010 - Added alternate workaround

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