User`s guide

164 Implementing an Open IBM SAN
򐂰 Adding new ESS logical volumes to the ESS, the new volumes go to the host
FC port that is selected.
򐂰 Assigning ESS logical volumes to host FC ports, means adding them to the
access profile of the selected host FC port and to pre-existing ESS logical
volumes.
Removing a host FC port from the ESS, means deleting the host FC port
definition and its access profile.
2.7.2 ESS managed ESS FC port WWPNs
Beginning with LIC level LBLD0312, there is a new function that allows the ESS
to locally administer the WWPNs for the ESS FC ports. This means the ESS FC
ports will have WWPNs which do not change when replacing an adapter. This is
especially useful if SDD is used for multipathing and when zoning is implemented
using the WWPNs of the ESS FC port.
Activating the WWPN naming convention
The activation of this feature for all of the ESS adapters requires a 45 minute
nonconcurrent service action and must be carried out by an IBM CE. Once this
feature has been activated by the CE, this is done from the service menu by
selecting:
1. Select Configuration Options Menu.
2. Select Change/Show Control Switches.
3. Fibre Channel WWPN Method - Standard should be displayed, and if so,
press the Enter key.
4. Press PF4, select WWNN, and then press Enter.
5. When instructed, IML the ESS.
From the time of activation onwards, all built in ESS FC ports and all new ESS
FC ports will have the locally administered WWPNs. However, even if the feature
is not activated, any replaced or added adapters will adopt the new locally
administered WWPN.
Host and switch considerations
After the CE has performed this service action and the naming convention has
been successfully changed from Standard to WWNN, there are some actions
that will need to be performed on the attached hosts and, in some cases, the
fabric components, in order to allow the host FC adapter to successfully login
using the new WWPN.