HA isolation response

Determining detailed build number information for VMware ESX hosts

In some cases, after patches have been installed on an ESX host, different build numbers are reported for different components of ESX Server. These KB articles provide details of the build information for ESX:

ESX 4.x: http://kb.vmware.com/kb/1012514

ESX 3.x: http://kb.vmware.com/kb/1001179
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VMware Express

On this day in 2010, VMware announced that VMware Express will hit the road this week. VMware Express is a state-of-the-art mobile datacenter, demo lab and briefing center designed to bring desktop virtualization and cloud computing solutions from VMware directly to customers and partners across the United States and Canada. VMware Express Virtualization Tour 2010 will stop in 150 cities.

http://bit.ly/bUBbtw
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Machine performance statistics

Without a vCenter Server, only the past 1 hour of Host and Virtual Machine performance statistics are available for the vSphere Client to collect from the host.
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Health of a vCenter database

Investigating the health of a vCenter database server

VMware vCenter Server woes can sometimes stem from back end database issues. VMware KB 1003979 provides many tips in troubleshooting vCenter in a Microsoft SQL Server environment.

http://kb.vmware.com/kb/1003979
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Add a static route

Add a static route for an additional Service Console interface with the following command:

/sbin/route add -net [subnet ID] netmask [subnet mask] gw [gateway for 2nd COS]

Example:
/sbin/route add -net 10.10.24.0 netmask 255.255.255.0 gw 192.168.0.2

Make the above change persistent by adding it to /etc/rc.local
http://kb.vmware.com/kb/1005212
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Free LUNs!

"Hey! Free LUNs!" or "There's no such thing as a free LUN"

Be sure to maintain good documentation and solid procedures when using RDMs. The intrinsic risk with RDMs is that any LUN presented to ESX(i) and not formatted as a VMFS volume will appear as available storage to administrators in the vSphere Client.
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Microsoft Network Load Balancing

When virtualizing Microsoft Network Load Balancing (NLB) in unicast mode, be sure the effective "Notify Switches" switch port policy for this VM (whether by portgroup or by vSwitch) is set to "No" or else the VM will have various networking issues with other network hosts.

NLB in multicast mode is not impacted by this setting.
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