Cisco Ucs Wwn Assignment Help

For the past few days, I’ve been working on troubleshooting a problem in UCS that I, admittedly, caused.   The problem in question has to do with an error code/msg that I received when trying to move a service profile from one blade to another.  The error code is: F0327.

According to the UCS error code reference guide, it translates as:


Fault Code:F0327


Service profile [name] configuration failed due to [configQualifier]


The named configuration qualifier is not available. This fault typically occurs because Cisco UCS Manager cannot successfully deploy the service profile due to a lack of resources that meet the named qualifier. For example, the following issues can cause this fault to occur:

•The service profile is configured for a server adapter with vHBAs, and the adapter on the server does not support vHBAs.

•The local disk configuration policy in the service profile specifies the No Local Storage mode, but the server contains local disks.

Recommended Action

If you see this fault, take the following actions:

Step 1  Check the state of the server and ensure that it is in either the discovered or unassociated state.

Step 2  If the server is associated or undiscovered, do one of the following:

–Discover the server.

–Disassociate the server from the current service profile.

–Select another server to associate with the service profile.

Step 3  Review each policy in the service profile and verify that the selected server meets the requirements in the policy.

Step 4  If the server does not meet the requirements of the service profile, do one of the following:

–Modify the service profile to match the server.

–Select another server that does meet the requirements to associate with the service profile.

Step 5  If you can verify that the server meets the requirements of the service profile, execute the show tech-support command and contact Cisco Technical Support.


While helpful in providing me lots of things to try to fix the problem, none of them worked.  It took me a while, but I figured out how to reproduce the error, a possible cause, and a workaround.

Here’s how to produce the error:

  1. Create a service profile without assigning any HBAs.  Shutdown the server when the association process has completed.
  2. After the profile is associated, assign an HBA or two.
  3. You should receive this dialog box:

You will then see this in the general tab of the service profile in question:

Now here is where the error can be induced:

  1. Don’t power on.  Keep in mind that the previous dialog box said that changes wouldn’t be applied until the blade was rebooted (powered on).
  2. Now disassociate the profile and associate it with another blade.  The “error” is carried over to the new blade and the config process (association process) does not run.

Powering up the newly associated blade does not correct the issue.  What has happened is that the disassociation/association process that is supposed to occur above does not take place due to the service profile being in an error state.


  1. Reboot after adding the HBA.  This will complete the re-configuration process, thus allowing disassociation/association processes to perform normally.  This is also the proper procedure.    Or
  2. Go to the Storage tab of the affected service profile and click on “Change World Wide Node Name”.  This forces the re-configuration to take place.



I’ve opened a ticket with TAC on this asking for a few documentation updates.  The first update is to basically state the correct method for applying the HBAs and that if not followed, the error msg will appear.

The second update is for them to update the error code guide with a 6th option – Press  “Change World Wide Node Name” button.

I am going to go out on a limb and say that they probably didn’t count on people like me doing things that they shouldn’t be doing or in an improper manner when they wrote the manuals.   🙂


Like this:



Categories: UCSTags: Cisco UCS, servers, troubleshooting

A WWN pool is a collection of WWNs for use by the Fibre Channel vHBAs in a Cisco UCS domain. You create separate pools for the following:

  • WW node names assigned to the server
  • WW port names assigned to the vHBA

A WWN pool can include only WWNNs or WWPNs in the ranges from 20:00:00:00:00:00:00:00 to 20:FF:FF:FF:FF:FF:FF:FF or from 50:00:00:00:00:00:00:00 to 5F:FF:FF:FF:FF:FF:FF:FF. All other WWN ranges are reserved. To ensure the uniqueness of the Cisco UCS WWNNs and WWPNs in the SAN fabric, we recommend that you use the following WWN prefix for all blocks in a pool: 20:00:00:25:B5:XX:XX:XX

If you use WWN pools in service profiles, you do not have to manually configure the WWNs that will be used by the server associated with the service profile. In a system that implements multi-tenancy, you can use a WWN pool to control the WWNs used by each organization.

You assign WWNs to pools in blocks. For each block or individual WWN, you can assign a boot target.

WWNN Pools

A WWNN pool is a WWN pool that contains only WW node names. If you include a pool of WWNNs in a service profile, the associated server is assigned a WWNN from that pool.

WWPN Pools

A WWPN pool is a WWN pool that contains only WW port names. If you include a pool of WWPNs in a service profile, the port on each vHBA of the associated server is assigned a WWPN from that pool.

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