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HOW TO: Suppress Configuration Issues and Warnings Alerts after enabling vSphere HA in a VMware vSphere Cluster

Tuesday, January 10th, 2012

In VMware vSphere 4 1 and 5.0, if you have two or more hosts, using shared storage, (SAN/NAS) you can create a VMware vSphere Cluster and enable High Availability mode (HA), if you have the correct VMware vSphere Licensing.

VMware vSphere High Availability (HA) provides easy to use, cost effective high availability for applications running in virtual machines. In the event of VMware vSphere server failure, affected virtual machines are automatically restarted on other VMware vSphere production servers with spare capacity.

You may have noticed that after Turning On vSphere HA in Cluster settings from the vSphere Client that a Configuration Issues warning yellow box may appear on the Summary page of ALL host ESXi servers in the vSphere Cluster.

The Configuration Issue reports This host currently has no management network redundancy

The Configuration Issue reports This host currently has no management network redundancy

The Configuration Issues reports “This host currently has no management network redundancy”

You will also notice there is also a yellow/orange warning triangle displayed on ALL the vSphere ESXi host servers in the vSphere Cluster.

Warning trianles on hosts in vSphere Cluster

Warning trianles on hosts in vSphere Cluster

The only issue, is that the Warning triangle displayed in VMware vSphere vCenter can mask real warning events.

VMware vSphere HA will still function correctly, the configuration issue, is warning that there is only one physical network interface connected to the virtual vswitch which has the service console (ESX) or management network interface (ESXi) connected.

example vSwitch with single physical network interface vmnic0

vSwitch example

vSwitch example

These configuration issues and warnings alert triangles, can be suppressed as follows

1

Connect to the VMware vSphere vCenter Server

Using the VMware vSphere Client, Login and Connect to the VMware vSphere vCenter server, using IP address or hostname of the VMware vSphere vCenter server, using vCenter Server Administrator username and password credentials.

Using the VMware vSphere Client, Login and Connect to the VMware vSphere vCenter Server

Using the VMware vSphere Client, Login and Connect to the VMware vSphere vCenter Server

2

Select the Cluster in Inventory

Select the Cluster in Inventory > Hosts and Clusters, Right Click the Cluster in the right hand panel, and select Edit Settings

Right Click the Cluster in the right hand panel, and select Edit Settings

Right Click the Cluster in the right hand panel, and select Edit Settings

The vSphere Cluster settings dialgoue box will be opened.

vSphere Cluster Settings

vSphere Cluster Settings

3

Select vSphere HA

Select vSphere HA and click Advanced Options, bottom right

vSphere HA Advanced Options

vSphere HA Advanced Options

the Advanced Options (vSphere HA) diaglogue box will open.

vSphere HA Advanced Options

vSphere HA Advanced Options

4

Add ‘das.ignoreRedundantNetWarning’ value

To suppress the configuration issues box and warning triangles, the das.ignoreRedundantNetWarning needs to be added with a value of TRUE.

Click the left hand column under Option, and enter das.ignoreRedundantNetWarn

ing

enter das.ignoreRedundantNetWarning

enter das.ignoreRedundantNetWarning

Click the right hand column under Value, and enter TRUE.

enter TRUE

enter TRUE

Click OK to return to Cluster Settings.

5

Click Cluster Features

Click Cluster Features and remove the Tick from Turn On vSphere HA.

This action will disable HA on ALL ESX/ESXi hosts in the cluster. Please note I would recommend any changes to a production environment be carried out and schedule out of core SLA hours.

Turn OFF HA

Turn OFF HA

Click OK. The HA cluster will be reconfigured, this will take a few seconds.

6

Turn On vSphere HA

Select the Cluster in Inventory > Hosts and Clusters, Right Click the Cluster in the right hand panel, and select Edit Settings

Right Click the Cluster in the right hand panel, and select Edit Settings

Right Click the Cluster in the right hand panel, and select Edit Settings

The vSphere Cluster settings dialgoue box will be opened.

Turn OFF HA

Turn OFF HA

Select Turn ON vSphere HA (by clicking and ensuring a Tick appears in the box)

Turn ON vSphere HA

Turn ON vSphere HA

Click OK.

The HA cluster will be reconfigured, this will take a few seconds. (Tested with Five hosts takes 40 seconds).

HA Configuration Issues Suppressed

HA Configuration Issues Suppressed

The Configuration Issues yellow box in the Summary Page and Warning Triangle will disappear immediately.

Thank you for reading my article, please leave valuable feedback.

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