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How do I add a VLAN to a trunked port on VMWare ESX servers?

Posted on 2008-10-16
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Last Modified: 2010-04-21
I have two ESX 3.5 servers that has multiple NICS with trunked ports.
This was set up by a VMWare engineer and obviously I didn't pay enough attention.

I need to add an additional VLAN/VLAN ID to the ports that are already trunked.
My network admin has added the new VLAN to the trunked ports and provided me with the VLAN ID
How do I get the NICS in the ESX server to recognize this new VLAN?

I tried doing a restart on the ESX host network service but that made no difference.
Do I need to make changes to IFCONFIG ?  If so, what/how?
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Question by:moorejc
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Expert Comment

by:that1guy15
ID: 22736486
you set the vlan information in the properties of the vswitch. Go to Configuration tab then Networking (on the left)

Click on the properties link next to the vswitch you want to configure.

You will want to add a VM port group. Make sure you set a VLAN ID the same as your network admin gave you.

Look under the networking section of the ESX admin guide for more details

http://www.vmware.com/pdf/vi3_35/esx_3/r35/vi3_35_25_3_server_config.pdf


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Author Comment

by:moorejc
ID: 22737671
Maybe I'm just being dense but I assume I'll need to be able to see the new VLAN ID on the physical NIC before I can set it in the properties of a vswitch.

The reason I say this is because when I go to the physical "Network Adapters" section, as opposed to the "Networking" section, I see a list of all of the VLANS that are being presented to my physical NICs.
 I know this must be a list of VLANS being presented from the CIsco switch to me as it includes some VLANs that I haven't configured anywhere in a port group.  
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Accepted Solution

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that1guy15 earned 500 total points
ID: 22741464
When you add the second vm port group the vmnic will be updated with the port groups that it passes.

If you want a little more explanation on how all this works check this short article out.

http://www.vmware.com/pdf/esx3_vlan_wp.pdf
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Author Closing Comment

by:moorejc
ID: 31506982
Thanks for the info.  it didn't occur to me that the physical NIC info would be displayed AFTER I modify the virtual settings.
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