IPv6 Hands-On Lab

Just to keep you updated (no, this blog is not a straw fire!):

A colleague & I have meanwhile set up an IPv6 test lab on the same hardware I use in my home lab. And this means a complete setup: DHCPv6, RA, static IPv6, tunnels, firewalling, broad range of client OS – the whole nine yards.

It’s going to take some time to write a series of blog posts describing the setup, and I’m still tempted to use IPv6 for the vSphere infrastructure as well. Maybe even for iSCSI, although it’s no longer officially supported…

So stay tuned, there’s a lot of stuff coming soon! Just have to finish the setup, writing – and my holidays. 🙂

Workaround for the vCenter Server appliance 5.1U1 update delay

The update process from 5.1.x to 5.1 Update 1 contains a serious flaw. The update may take more than 45 minutes, some report more than one hour. VMware even mentions this in their release notes:

Update of vCenter Server Appliance 5.1.x to vCenter Server Appliance 5.1 Update 1 halts at web UI while showing update status as installing updates*
When you attempt to upgrade vCenter Server Appliance 5.1.x to vCenter Server Appliance 5.1 Update 1, the update process halts for nearly an hour and the update status at Web UI shows as installing updates. However, eventually, the update completes successfully after an hour.

Workaround: None.
(http://www.vmware.com/support/vsphere5/doc/vsphere-vcenter-server-51u1-release-notes.html)

The generic update documentation KB article 2031331 “Updating vCenter Server Appliance 5.x” mentions even longer durations:

The update process can take approximately 90 to 120 minutes. Do not reboot until the update is complete.
(http://kb.vmware.com/kb/2031331)

Well, there is a workaround, even a very simple one: