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:00:FF:FF:FF:FF:FF or from 50:00:00:00:00:00:00:00 to 5F:FF:00:FF:FF:FF:FF:FF. All other WWN ranges are reserved. When fibre channel traffic is sent through the Cisco UCS infrastructure, the source WWPN is converted to a MAC address. You cannot use WWPN pool which can translate to a source multicast MAC address. 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.
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:00:FF:FF:FF:FF:FF or from 50:00:00:00:00:00:00:00 to 5F:FF:00:FF:FF:FF:FF:FF. All other WWN ranges are reserved. When fibre channel traffic is sent through the Cisco UCS infrastructure, the source WWPN is converted to a MAC address. You cannot use WWPN pool which can translate to a source multicast MAC address. 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 . |
||||||||
Step 3 |
Expand the node for the organization where you want to create the pool. If the system does not include multi tenancy, 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:
|
||||||||
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:
|
||||||||
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:00:FF:FF:FF:FF:FF or from 50:00:00:00:00:00:00:00 to 5F:FF:00:FF:FF:FF:FF:FF. All other WWN ranges are reserved. When fibre channel traffic is sent through the Cisco UCS infrastructure, the source WWPN is converted to a MAC address. You cannot use WWPN pool which can translate to a source multicast MAC address. 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 . |
||||||
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:
|
||||||
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 . |
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:00:FF:FF:FF:FF:FF or from 50:00:00:00:00:00:00:00 to 5F:FF:00:FF:FF:FF:FF:FF. All other WWN ranges are reserved. When fibre channel traffic is sent through the Cisco UCS infrastructure, the source WWPN is converted to a MAC address. You cannot use WWPN pool which can translate to a source multicast MAC address. 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 . |
||||||||
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 Initiator. |
||||||||
Step 5 |
In the Create WWNN Initiator dialog box, complete the following fields:
|
||||||||
Step 6 |
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 . |
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 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 . |
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. |