How to replace HBA WWN in SAN Switch and how to DE-Registered old Host HBA initiator and Registered New Initiator in EMC VNX storage?

login to San Swith go to Zone Admin 

select edit and select Replace WWN 

enter old wwn in replace field and new on in by field then click ok 

click save and enable config to save the change.

 for DE-registered old host HBA Initiator need to login with Engineer Mode by using Ctrl+shift+F - enter password and now it will allow to de-registered old initiator caution warning message will appear indicating cause loss of data if the initiator is associated with any storage group click yes 

registering new HBA Host Initiator ni

Logon to storage Unispher page, click on hosts - initiator and select HBA to Register .