Archive for June, 2010

Changing the VLAN ID of a ESX Service Console from the Command Line

Friday, June 11th, 2010

This is just a quick note to describe how you can easily change the vlan ID of the service console in ESX.

To remove the vlan id completely, just set it to 0 (in case you have set it by accident on an access port)

esxcfg-vswitch vSwitch0 -v 0 -p “Service Console”

To set a vlan id on the service console (in case you forgot to define this during the installation)

esxcfg-vswitch vSwitch0 -v X -p “Service Console” (enter the vlan number where X is)

Of course make sure to check which vSwitch the Service Console is on (and the name of the Service Console) with esxcfg-vswitch -l

Difference between WWNN and WWPN

Tuesday, June 8th, 2010

I’ve got this question several times from customers, friends, co-workers etc. Suppose now it’s time to make a small blogpost of it. (Also handy for VCP/VCDX exams)

A WWPN (World Wide Port Name) is physically assigned to a part in a Fibre Channel device, such as a FC HBA or SAN. It is the equivalent of the MAC address in the Ethernet protocol as it is supposed to be a unique identifier in the netwok.
The WWN’s are administred by the IEEE like the MAC Address is. The first few octets are assigned to a manafacturer, the rest is arbitrary.

The WWNN (World Wide Node Name) is a World Wide Name assigned to a node in a Fibre Channel fabric. It is valid for the same WWNN to be seen on many different ports on the netwerk.

The WWNN can be regenerated, the WWPN not :

(Screendump of VM properties below)

More info in this (usefull) document : Brocade_NPIV_ESX3.5_WP

VMFS access is slow (unload VMFS-2 & NFS drivers)

Tuesday, June 8th, 2010

When using several VMFS 3 datastores, there is no need to use the VMFS 2 driver. You can unload the driver with the following command :

vmkload_mod -u vmfs2

Also, if you are not using (or planning to use) NFS datastores, you can also unload the NFS driver with the following command :

vmkload_mod -u nfsclient

In my (growing) lab environment the performance improvement was considerably.

Use ONTAP 8.0.7 Mode Simulator on ESX

Sunday, June 6th, 2010

I found here information about running ONTAP 8.0.7. on ESX. (mirror : Use Ontap807 on ESX)

Updated : VCDX Defense dates this year

Saturday, June 5th, 2010

VCDX Defense

Defense interviews will be held during the following days:

  • July 5-9, Melbourne, Australia (Application Deadline: May 18)
  • August 23-27, San Francisco, CA (Application Deadline: June 21)
  • October 11-15, Copenhagen, Denmark (Application Deadline: August 2)
  • November 1-5, Cambridge, MA (Application Deadline: Aug 30)

Completed applications will be scheduled in the order recieved.

Unable to update Mailbox SD in the DS.

Thursday, June 3rd, 2010

A customer complained about Snapmanager for Exchange (NetApp) not working. The following error was in the eventlog:

Microsoft says the following about this:

Probably so rights issues on the mailbox. On the internet I found a script that the Mailbox GUID
turnover to the user. Download this script here : MbxGUIDtoMbxName

Give the GUID and the script gives the user name.


In this case there were rights to an Outlook folder from someone who was already out of service