Similar in format to WWNNs, a WWPN is a 64-bit address assigned to individual vHBAs in servers. The WWNN for the vHBAs in a blade server is always identical, whereas the WWPN is always unique. Storage zoning is done using the WWPN addresses.
The following are the steps to create WWNN address pools:
- Log in to the UCSM screen.
- Click on the SAN tab in the navigation pane.
- Click on the Pools tab and expand root.
- Right-click on WWPN Pools, and click on Create WWPN Pool, as shown in the following screenshot:
- In the pop-up window, assign the Name and Description values to the WWPN pool.
- The selection of Default as the Assignment Order value is random. Select Sequential to assign WWPNs sequentially.
- Click on Next:
- Click on Add on the next screen.
- In the pop-up window, change Size to create the desired number of WWPN addresses.
- Click on OK and then on Finish, as shown here:
- In order to verify the WWPN pool, click on the WWPN Pools tab in the navigation pane, and click on the Initiators tab in the work pane as shown here:
To ensure the uniqueness of WWNN and WWPN pools, only use WWN numbers 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. To ensure the uniqueness of the Cisco UCS WWNNs and WWPNs in the SAN fabric, it is recommended you use the prefix in a pool as 20:00:00:25:B5:XX:XX:XX.