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    • https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Unable_to_generate_a_WWN_No_more_MAC_address_available_to_generate_WWN
      Applies to FAS2620 All Flash FAS FAS2650 FAS 2720 FAS8000 FAS8200 AFF8000 Series FAS9000 Issue Errors when provisioning FCP services and LIFs: ClusterA::> vserver fcp create -status-admin up -vserver ...Applies to FAS2620 All Flash FAS FAS2650 FAS 2720 FAS8000 FAS8200 AFF8000 Series FAS9000 Issue Errors when provisioning FCP services and LIFs: ClusterA::> vserver fcp create -status-admin up -vserver SAN_vserver1 Error: command failed: Unable to assign a unique WWNN for SAN_vserver1 Cluster1::> network interface create -vserver SAN_vserver1 -lif fcp1 -role data -data-protocol fcp -home-node node1 -home-port 0a Info: Unable to generate a WWN, No more MAC address available to generate WWN.
    • https://kb.netapp.com/on-prem/E-Series/SANtricity-OS-KBs/WWNs_changed_after_offline_replacement_of_tray_0
      Applies to E-Series systems with external trays SANtricity OS Issue After replacing tray 0 while the system was offline, the FC target port WWNs changed of all BASE and host interface card (HIC) ports
    • https://kb.netapp.com/on-prem/E-Series/SANtricity-OS-KBs/How_to_modify_volume_WWN_on_E-Series_using_vdmSetWWN
      Applies to NetApp SANtricity OS Description Volume WWN (World Wide Name) has changed and volume access is lost Host side disk re-signature not feasible Volume WWN can be modified to previous value wit...Applies to NetApp SANtricity OS Description Volume WWN (World Wide Name) has changed and volume access is lost Host side disk re-signature not feasible Volume WWN can be modified to previous value with Support assistance.