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vCenter

Windows Server NTP Sync from external source

By Antti Hurme 11/12/2013 2 Comments 1 Min Read

One thing most forget is that the Windows Domain Controllers also need to be configured properly for time synchronization. It’s easy to forget as it takes quite a few months, sometimes even years for the time difference to be noticeable by humans. Software usually tends to act up once the time difference is big enough and it breaks all kinds of stuff. For example in a vCD environment where the…

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Invalid IPMI MAC Address

Encountered an interesting issue when adding Power Management settings on one VMware ESXi 5.1 host today when vCenter Server returned an error message that the BMC MAC Address was invalid. The interesting thing was that I did check the Mac address prior to entering it in VMware vSphere Client and as such should have been correct. After digging trough the vCenter Server logs, located in a vCenter Server 5.1 installation:…

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ESXi APD&PDL – Part 1 Diagnosing lost iSCSI LUN

By Antti Hurme 27/06/2013 2 Comments 8 Min Read

This is Part1 of iSCSI All Paths Down (APD) and Permanent Device Loss (PDL) situations which can cause quite a big havoc in a VMware virtualization environment. In this first part I will focus on how to diagnose the situation, what to look for in LOG files and how to verify what has actually happened. NOTE!: This is not a definitive guide, and should only be considered as such. This…

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Collection of useful VMware diagrams

By Antti Hurme 02/05/2013 No Comments 1 Min Read

VMware diagrams you might find useful: VMware vCloud Director network ports diagram (KB: 1030816) VMware vCloud Director Cell Architecture (KB: 1030954) VMware vSphere 5 Memory Management and Monitoring diagram (KB: 2017642) Network port diagram for vSphere 5.x (2054806)   * Click on any of the list items to open VMware KB article with download links

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