How to change the VLAN ID of your ESX Service Console:

Need to change the VLAN ID of your Service Console?  Have you ever forgotten to enter the VLAN ID for your Service Console during the installation process?  If so, there's no need to reinstall, just console in and change it using the following commands.

Run the following command to see the current vSwitch configuration.  Make note of the virtual switch and the name of the Service console.  (typically vSwitch0 and "Service Console")
esxcfg-vswitch -l

Issue the following command to change the VLAN ID.   X is the desired VLAN:
esxcfg-vswitch vSwitch0 -v X -p "Service Console"

Verify the vSwtich configuration:
esxcfg-vswitch -l

Restart the network service:
service network restart