When I read about the new powershell cmdlet New-MailboxExportRequest, I was very excited about it (because I was planning a migration for a few mailboxes).

After having to manually install several required hotfixes (some of which were related to .NET 2.0 (what the hell MS?)) and running through the SP2 upgrade process three times..I was much less excited: whatever I tried, the cmdlet that triggered me to upgrade, was nowhere to be found.

Turns out, the cmdlet does not appear to exist in the powershell-sphere, if you do not have the proper permissions (must be easier to hide commands … Read more

Today I had the need to remove the VLAN ID from 60 ESXi 5.1 hosts. Instead of doing it 60 times manually through the KVM, PowerCLI was enlisted for the job. That wasn’t the hard part, the one-liner is quite simple..For those interested:

Get-VMHost | Get-VirtualPortGroup -Name "Management Network" | Set-VirtualPortGroup -Name "Management Network" -VLanID 0

As mentioned, this wasn’t the hard part. It appears that vSphere 5.1 has a (pretty cool!) new feature that checks whether a network change has an impact on the connectivity of the ESXi host (like changing the service console VLAN ID or IP address) … Read more

Brad Hedlund‘s blog is one of my favorite sources of excellent UCS (and other general) material. I just found the exceptional UCS videos, which deserved a re-share.

Part 1 – The Physical Architecture of UCS

In this video we take a look at the physical network architecture of Cisco UCS and incorporate the new capability of connecting both blade and rack mount servers to UCS Manager.

Part 2 – Infrastructure Virtualization & Logical Architecture

Here we look at how Cisco UCS virtualizes every significant component of the physical architecture; switches, cables, adapters, and servers. Then we look at how … Read more

When expanding your UCS environment, Cisco will deliver your new blades with the latest firmware. If you’re running an older firmware on your UCS setup, this could cause an issue with the blade discovery.

If the new blades are hung on the discovery process with BIOS POST issues, the following message can appear in the FSM tab of the server:

Waiting for BIOS POST completion from CIMC on server 1/1 (FSM-STAGE:sam:dme:ComputeBladeDiscover:BiosPostCompletion)

This can happen when then blades firmware is newer than the firmware available in the bundle installed in the UCS Manager. The easiest way to recover and complete your … Read more

For a very long time, fixing MySQL slaves was a tedious task. Slaves died, replication fails, tables would get out of sync and you’d have to import all the (consistant) data from the master database. Depending on the importance of the slave, this could mean downtime for your master while exporting.

MySQLdump is usually the application one uses to execute this task, locking the tables while exporting. For me, having a database readonly, is downtime. However you look at it, if your website is not 100% useable, it is experiencing downtime.

I came across Percona’s xtrabackup utility a while back … Read more

When using the “Simple Install” to install a new vCenter setup, you might encounter the following error when trying to register the vCenter server to the Web interface:

The vSphere Web Client Administration Tool only supports registration of vCenter Server version 5.0. For newer versions, the vCenter Server system must be registered with the Lookup Service to allow the vSphere Web Client to discover the system.

To resolve this, follow these steps:

  • Log in to the vSphere Web client as the admin account (admin@System-Domain) you created during the vCenter server installation
  • Browse to “Administration -> SSO Users and Groups”
  • Browse
Read more

I had a corrupted IOS image on a 3750E switch today and feared for a xmodem transfer to eat up my day, until I found that you can copy from TFTP. It’s very well hidden, but still possible. Here’s how:

When the switch has ‘booted’ without a proper IOS, you’ll be in the ‘switch: ‘ command line. In the following example, I will assume that the TFTP server has IP and the switch will use

Connect your TFTP server to the ethernet management port, then follow this sequence:

switch: set IP_ADDR
switch: set DEFAULT_ROUTER
switch: copy
Read more