Configuring VLANs on UCS

Introduction

This document shows steps required to add VLANs to both UCS and VMware. In UCS each VLAN is identified by a unique ID. The VLAN ID is a number that represents that particular VLAN. The name that you assign to a VLAN ID adds a layer of abstraction that allows you to globally update all servers associated with service profiles that use the named VLAN. You can also create more than one named VLANs with the same VLAN ID. Note that the name of a VLAN is known only within the UCS environment, and outside of the UCS the VLAN is represented by the unique ID.

 VLAN Configuration on UCS

Depending on how the UCS infrastructure is configured, VLAN availability for physical hosts may have to be configured on either a port group or individual host basis. The same applies in the VMWare environment.

Follow the steps to configure VLAN on UCS:

a) Open UCS manager. In the Navigation pane on the left of the application, select the LAN tab.

b) Expand the navigation tree so that the VLANs branch is visible.  Right click on the VLANs branch and select Create VLAN(s).

c) Provide a meaningful name for the VLAN, this name can not be changed once saved. For most situations the Common/Global radio button should be selected to ensure the same configuration is applied to both Fabrics.  Enter the VLAN ID(s), then press the Check Overlap button to ensure there is no conflict with existing configuration and if unique, press OK.

d) Check that the newly created VLAN appears in the list of configured VLANs in the navigation pane.

e) If the platform is using vNIC templates then the next step is to add the created VLAN to the required templates. Expand the vNIC Templates branch of the navigation pane (LAN -> Policies -> root -> vNIC Templates) and select the template which should have the VLAN available.

f) On the General tab for each Template click Modify VLANs.

g) In the window that opens add the new VLAN.

Repeat this for each Template.

h) Switch to the servers tab in the Navigation Pane and expand the Service Profiles and the root node, the service profiles for each Chassis/Blade should be visible.

i) Expand each service profile in turn so that the vNIC for the Chassis/Blade is visible.  If the vNIC is bound to one of the templates modified earlier then the VLAN will be listed under the vNIC.

j) If the VLAN is not listed then select the vNIC and in the main panel click the Modify VLANs link.  For vNICs bound to templates, this link will be greyed out.

k) In the window that opens select the new VLAN.

Repeat this process for each vNIC that is not bound to a template.

Once all the vNICs have the VLAN available to them, exit UCS Manager.

Source