Configuring WWN Pools

This chapter includes the following sections:

WWN Pools

A World Wide Name (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 vHBA

  • WW port names assigned to the vHBA

  • Both WW node names and WW port names

Important:

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, Cisco recommends using 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.

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.

WWxN Pools

A WWxN pool is a WWN pool that contains both WW node names and WW port names. You can specify how many ports per node are created with WWxN pools. The pool size must be a multiple of ports-per-node + 1. For example, if you specify 7 ports per node, the pool size must be a multiple of 8. If you specify 63 ports per node, the pool size must be a multiple of 64.

You can use a WWxN pool whenever you select a WWNN or WWPN pool. The WWxN pool must be created before it can be assigned.

  • For WWNN pools, the WWxN pool is displayed as an option in the WWNN Assignment drop-down list.

  • For WWPN pools, choose Derived in the WWPN Assignment drop-down list.

Configuring WWNN Pools

Creating a WWNN Pool

Important:

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, Cisco recommends using the following WWN prefix for all blocks in a pool: 20:00:00:25:B5:XX:XX:XX

A WWNN pool with the last four digits ending in 00:01 causes the vHBA to not initialize, no output from the lunlist command, and displays the Waiting for Flogi error. This error occurs if the WWPN is in the same block as the WWNN ending in 00:01. To ensure that the WWNN and WWPN addresses do not overlap, we recommend using a unique WWN address.

Procedure
    Step 1   In the Navigation pane, click SAN.
    Step 2   In the SAN tab, expand SAN > Pools.
    Step 3   Expand the node for the organization where you want to create the pool.

    If the system does not include multitenancy, expand the root node.

    Step 4   Right-click WWNN Pools and select Create WWNN Pool.
    Step 5   In the Define Name and Description dialog box of the Create WWNN Pool wizard, complete the following fields:
    Name Description

    Name field

    The name of the World Wide Node Name pool.

    This name can be between 1 and 32 alphanumeric characters. You cannot use spaces or any special characters other than - (hyphen), _ (underscore), : (colon), and . (period), and you cannot change this name after the object is saved.

    Description field

    A description of the pool.

    Enter up to 256 characters. You can use any characters or spaces except ` (accent mark), \ (backslash), ^ (carat), " (double quote), = (equal sign), > (greater than), < (less than), or ' (single quote).

    Assignment Order field

    This can be one of the following:

    • Default—Cisco UCS Manager selects a random identity from the pool.

    • Sequential—Cisco UCS Manager selects the lowest available identity from the pool.

    Step 6   Click Next.
    Step 7   In the Add WWN Blocks page of the Create WWNN Pool wizard, click Add.
    Step 8   In the Create WWN Block dialog box, complete the following fields:
    Name Description

    From field

    The first WWN in the block.

    Size field

    The number of WWNs in the block.

    For WWxN pools, the pool size must be a multiple of ports-per-node + 1. For example, if there are 7 ports per node, the pool size must be a multiple of 8. If there are 63 ports per node, the pool size must be a multiple of 64.
    Step 9   Click OK.
    Step 10   Click Finish.
    What to Do Next

    Include the WWNN pool in a service profile and template.

    Adding a WWN Block to a WWNN Pool

    Important:

    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, Cisco recommends using the following WWN prefix for all blocks in a pool: 20:00:00:25:B5:XX:XX:XX

    Procedure
      Step 1   In the Navigation pane, click SAN.
      Step 2   In the SAN tab, expand SAN > Pools > Organization_Name .
      Step 3   Expand the WWNN Pools node.
      Step 4   Right-click the WWNN pool to which you want to add a WWN block and select Create WWN Block.
      Step 5   In the Create WWN Block dialog box, complete the following fields:
      Name Description

      From field

      The first WWN in the block.

      Size field

      The number of WWNs in the block.

      For WWxN pools, the pool size must be a multiple of ports-per-node + 1. For example, if there are 7 ports per node, the pool size must be a multiple of 8. If there are 63 ports per node, the pool size must be a multiple of 64.
      Step 6   Click OK.

      Deleting a WWN Block from a WWNN Pool

      If you delete an address block from a pool, Cisco UCS Manager does not reallocate any addresses in that block that were assigned to vNICs or vHBAs. All assigned addresses from a deleted block remain with the vNIC or vHBA to which they are assigned until one of the following occurs:

      • The associated service profiles are deleted.

      • The vNIC or vHBA to which the address is assigned is deleted.

      • The vNIC or vHBA is assigned to a different pool.

      Procedure
        Step 1   In the Navigation pane, click SAN.
        Step 2   In the SAN tab, expand SAN > Pools > Organization_Name > WWNN Pools > WWNN_Pool_Name .
        Step 3   Right-click the WWN block that you want to delete and select Delete.
        Step 4   If a confirmation dialog box displays, click Yes.

        Adding a WWNN Initiator to a WWNN Pool

        Important:

        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, Cisco recommends using the following WWN prefix for all blocks in a pool: 20:00:00:25:B5:XX:XX:XX

        Procedure
          Step 1   In the Navigation pane, click SAN.
          Step 2   In the SAN tab, expand SAN > Pools > Organization_Name .
          Step 3   Expand the WWNN Pools node.
          Step 4   Right-click the WWNN pool to which you want to add a WWNN initiator and select Create WWNN Initiiator.
          Step 5   In the Create WWNN Initiator dialog box, complete the following fields:
          Name Description

          World Wide Name field

          The WWN.

          Name field

          The name of the WWNN initiator.

          This name can be between 1 and 16 alphanumeric characters. You cannot use spaces or any special characters other than - (hyphen), _ (underscore), : (colon), and . (period), and you cannot change this name after the object is saved.

          Description field

          A user-defined description of the WWNN initiator.

          Enter up to 256 characters. You can use any characters or spaces except ` (accent mark), \ (backslash), ^ (carat), " (double quote), = (equal sign), > (greater than), < (less than), or ' (single quote).

          Step 6   Click OK.

          Deleting a WWNN Initiator from a WWNN Pool

          Procedure
            Step 1   In the Navigation pane, click SAN.
            Step 2   In the SAN tab, expand SAN > Pools > Organization_Name .
            Step 3   Expand the WWPN Pools node.
            Step 4   Choose the WWNN pool from which you want to delete a WWNN initiator.
            Step 5   In the Work pane, click the Initiators tab.
            Step 6   Right-click the initiator that you want to delete and choose Delete.
            Step 7   If a confirmation dialog box displays, click Yes.

            Deleting a WWNN Pool

            If you delete a pool, Cisco UCS Manager does not reallocate any addresses from that pool that were assigned to vNICs or vHBAs. All assigned addresses from a deleted pool remain with the vNIC or vHBA to which they are assigned until one of the following occurs:

            • The associated service profiles are deleted.

            • The vNIC or vHBA to which the address is assigned is deleted.

            • The vNIC or vHBA is assigned to a different pool.

            Procedure
              Step 1   In the Navigation pane, click SAN.
              Step 2   In the SAN tab, expand SAN > Pools > Organization_Name .
              Step 3   Expand the WWNN Pools node.
              Step 4   Right-click the WWNN pool you want to delete and select Delete.
              Step 5   If a confirmation dialog box displays, click Yes.

              Configuring WWPN Pools

              Creating a WWPN Pool

              Important:

              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, Cisco recommends using the following WWN prefix for all blocks in a pool: 20:00:00:25:B5:XX:XX:XX

              A WWNN pool with the last four digits ending in 00:01 causes the vHBA to not initialize, no output from the lunlist command, and displays the Waiting for Flogi error. This error occurs if the WWPN is in the same block as the WWNN ending in 00:01. To ensure that the WWNN and WWPN addresses do not overlap, we recommend using a unique WWN address.

              Procedure
                Step 1   In the Navigation pane, click SAN.
                Step 2   In the SAN tab, expand SAN > Pools.
                Step 3   Expand the node for the organization where you want to create the pool.

                If the system does not include multitenancy, expand the root node.

                Step 4   Right-click WWPN Pools and select Create WWPN Pool.
                Step 5   In the Define Name and Description page of the Create WWPN Pool wizard, complete the following fields:
                Name Description

                Name field

                The name of the World Wide Port Name pool.

                This name can be between 1 and 32 alphanumeric characters. You cannot use spaces or any special characters other than - (hyphen), _ (underscore), : (colon), and . (period), and you cannot change this name after the object is saved.

                Description field

                A description of the pool.

                Enter up to 256 characters. You can use any characters or spaces except ` (accent mark), \ (backslash), ^ (carat), " (double quote), = (equal sign), > (greater than), < (less than), or ' (single quote).

                Assignment Order field

                This can be one of the following:

                • Default—Cisco UCS Manager selects a random identity from the pool.

                • Sequential—Cisco UCS Manager selects the lowest available identity from the pool.

                Step 6   Click Next.
                Step 7   In the Add WWN Blocks page of the Create WWPN Pool wizard, click Add.
                Step 8   In the Create WWN Block dialog box, complete the following fields:
                Name Description

                From field

                The first WWN in the block.

                Size field

                The number of WWNs in the block.

                For WWxN pools, the pool size must be a multiple of ports-per-node + 1. For example, if there are 7 ports per node, the pool size must be a multiple of 8. If there are 63 ports per node, the pool size must be a multiple of 64.
                Step 9   Click OK.
                Step 10   Click Finish.
                What to Do Next

                Include the WWPN pool in a vHBA template.

                Adding a WWN Block to a WWPN Pool

                Important:

                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, Cisco recommends using the following WWN prefix for all blocks in a pool: 20:00:00:25:B5:XX:XX:XX

                Procedure
                  Step 1   In the Navigation pane, click SAN.
                  Step 2   In the SAN tab, expand SAN > Pools > Organization_Name .
                  Step 3   Expand the WWPN Pools node.
                  Step 4   Right-click the WWPN pool to which you want to add a WWN block and select Create WWN Block.
                  Step 5   In the Create WWN Block dialog box, complete the following fields:
                  Name Description

                  From field

                  The first WWN in the block.

                  Size field

                  The number of WWNs in the block.

                  For WWxN pools, the pool size must be a multiple of ports-per-node + 1. For example, if there are 7 ports per node, the pool size must be a multiple of 8. If there are 63 ports per node, the pool size must be a multiple of 64.
                  Step 6   Click OK.

                  Deleting a WWN Block from a WWPN Pool

                  If you delete an address block from a pool, Cisco UCS Manager does not reallocate any addresses in that block that were assigned to vNICs or vHBAs. All assigned addresses from a deleted block remain with the vNIC or vHBA to which they are assigned until one of the following occurs:

                  • The associated service profiles are deleted.

                  • The vNIC or vHBA to which the address is assigned is deleted.

                  • The vNIC or vHBA is assigned to a different pool.

                  Procedure
                    Step 1   In the Navigation pane, click SAN.
                    Step 2   In the SAN tab, expand SAN > Pools > Organization_Name > WWPN Pools > WWPN_Pool_Name .
                    Step 3   Right-click the WWN block that you want to delete and select Delete.
                    Step 4   If a confirmation dialog box displays, click Yes.

                    Adding a WWPN Initiator to a WWPN Pool

                    Important:

                    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, Cisco recommends using the following WWN prefix for all blocks in a pool: 20:00:00:25:B5:XX:XX:XX

                    Procedure
                      Step 1   In the Navigation pane, click SAN.
                      Step 2   In the SAN tab, expand SAN > Pools > Organization_Name .
                      Step 3   Expand the WWPN Pools node.
                      Step 4   Right-click the WWPN pool to which you want to add a WWPN initiator and select Create WWPN Initiator.
                      Step 5   In the Create WWPN Initiator dialog box, complete the following fields:
                      Name Description

                      World Wide Name field

                      The WWN.

                      Name field

                      The name of the WWPN initiator.

                      This name can be between 1 and 16 alphanumeric characters. You cannot use spaces or any special characters other than - (hyphen), _ (underscore), : (colon), and . (period), and you cannot change this name after the object is saved.

                      Description field

                      A user-defined description of the WWPN initiator.

                      Enter up to 256 characters. You can use any characters or spaces except ` (accent mark), \ (backslash), ^ (carat), " (double quote), = (equal sign), > (greater than), < (less than), or ' (single quote).

                      Step 6   If you want to add a SAN boot target, expand the Boot Target area and complete the following fields:
                      Name Description

                      Boot Target WWPN field

                      The WWPN that corresponds to the location of the boot image.

                      Boot Target LUN field

                      The LUN that corresponds to the location of the boot image.

                      Step 7   Click OK.

                      Deleting a WWPN Initiator from a WWPN Pool

                      Procedure
                        Step 1   In the Navigation pane, click SAN.
                        Step 2   In the SAN tab, expand SAN > Pools > Organization_Name .
                        Step 3   Expand the WWPN Pools node.
                        Step 4   Choose the WWPN pool from which you want to delete a WWPN initiator.
                        Step 5   In the Work pane, click the Initiators tab.
                        Step 6   Right-click the initiator that you want to delete and choose Delete.
                        Step 7   If a confirmation dialog box displays, click Yes.

                        Deleting a WWPN Pool

                        If you delete a pool, Cisco UCS Manager does not reallocate any addresses from that pool that were assigned to vNICs or vHBAs. All assigned addresses from a deleted pool remain with the vNIC or vHBA to which they are assigned until one of the following occurs:

                        • The associated service profiles are deleted.

                        • The vNIC or vHBA to which the address is assigned is deleted.

                        • The vNIC or vHBA is assigned to a different pool.

                        Procedure
                          Step 1   In the Navigation pane, click SAN.
                          Step 2   In the SAN tab, expand SAN > Pools > Organization_Name .
                          Step 3   Expand the WWPN Pools node.
                          Step 4   Right-click the WWPN pool you want to delete and select Delete.
                          Step 5   If a confirmation dialog box displays, click Yes.

                          Configuring WWxN Pools

                          Creating a WWxN Pool

                          Important:

                          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, Cisco recommends using the following WWN prefix for all blocks in a pool: 20:00:00:25:B5:XX:XX:XX

                          Procedure
                            Step 1   In the Navigation pane, click SAN.
                            Step 2   In the SAN tab, expand SAN > Pools.
                            Step 3   Expand the node for the organization where you want to create the pool.

                            If the system does not include multitenancy, expand the root node.

                            Step 4   Right-click WWxN Pools and select Create WWxN Pool.
                            Step 5   In the Define Name and Description page of the Create WWxN Pool wizard, complete the following fields:
                            Name Description

                            Name field

                            The name of the World Wide Port Name pool.

                            This name can be between 1 and 32 alphanumeric characters. You cannot use spaces or any special characters other than - (hyphen), _ (underscore), : (colon), and . (period), and you cannot change this name after the object is saved.

                            Description field

                            A description of the pool.

                            Enter up to 256 characters. You can use any characters or spaces except ` (accent mark), \ (backslash), ^ (carat), " (double quote), = (equal sign), > (greater than), < (less than), or ' (single quote).

                            Max Ports per Node field

                            The maximum number of ports that can be assigned to each node name in this pool.

                            You cannot change this value once the object has been saved.

                            Assignment Order field

                            This can be one of the following:

                            • Default—Cisco UCS Manager selects a random identity from the pool.

                            • Sequential—Cisco UCS Manager selects the lowest available identity from the pool.

                            Step 6   Click Next.
                            Step 7   In the Add WWN Blocks page of the Create WWxN Pool wizard, click Add.
                            Step 8   In the Create WWN Block dialog box, complete the following fields:
                            Name Description

                            From field

                            The first WWN in the block.

                            Size field

                            The number of WWNs in the block.

                            For WWxN pools, the pool size must be a multiple of ports-per-node + 1. For example, if there are 7 ports per node, the pool size must be a multiple of 8. If there are 63 ports per node, the pool size must be a multiple of 64.
                            Step 9   Click OK.
                            Step 10   Click Finish.
                            What to Do Next

                            Include the WWxN pool in a service profile and template.

                            Adding a WWN Block to a WWxN Pool

                            Important:

                            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, Cisco recommends using the following WWN prefix for all blocks in a pool: 20:00:00:25:B5:XX:XX:XX

                            Procedure
                              Step 1   In the Navigation pane, click SAN.
                              Step 2   In the SAN tab, expand SAN > Pools > Organization_Name .
                              Step 3   Expand the WWxN Pools node.
                              Step 4   Right-click the WWxN pool to which you want to add a WWN block and select Create WWN Block.
                              Step 5   In the Create WWN Block dialog box, complete the following fields:
                              Name Description

                              From field

                              The first WWN in the block.

                              Size field

                              The number of WWNs in the block.

                              For WWxN pools, the pool size must be a multiple of ports-per-node + 1. For example, if there are 7 ports per node, the pool size must be a multiple of 8. If there are 63 ports per node, the pool size must be a multiple of 64.
                              Step 6   Click OK.

                              Deleting a WWN Block from a WWxN Pool

                              If you delete an address block from a pool, Cisco UCS Manager does not reallocate any addresses in that block that were assigned to vNICs or vHBAs. All assigned addresses from a deleted block remain with the vNIC or vHBA to which they are assigned until one of the following occurs:

                              • The associated service profiles are deleted.

                              • The vNIC or vHBA to which the address is assigned is deleted.

                              • The vNIC or vHBA is assigned to a different pool.

                              Procedure
                                Step 1   In the Navigation pane, click SAN.
                                Step 2   In the SAN tab, expand SAN > Pools > Organization_Name > WWxN Pools > WWxN_Pool_Name .
                                Step 3   Right-click the WWN block that you want to delete and select Delete.
                                Step 4   If a confirmation dialog box displays, click Yes.

                                Deleting a WWxN Pool

                                If you delete a pool, Cisco UCS Manager does not reallocate any addresses from that pool that were assigned to vNICs or vHBAs. All assigned addresses from a deleted pool remain with the vNIC or vHBA to which they are assigned until one of the following occurs:

                                • The associated service profiles are deleted.

                                • The vNIC or vHBA to which the address is assigned is deleted.

                                • The vNIC or vHBA is assigned to a different pool.

                                Procedure
                                  Step 1   In the Navigation pane, click SAN.
                                  Step 2   In the SAN tab, expand SAN > Pools > Organization_Name .
                                  Step 3   Expand the WWxN Pools node.
                                  Step 4   Right-click the WWxN pool you want to delete and select Delete.
                                  Step 5   If a confirmation dialog box displays, click Yes.