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    • Client receives "mount.nfs: Protocol not supported" attempting to mount with NFSv4 in ONTAP 9
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/Client_receives_mount_nfs_Protocol_not_supported_with_NFSv4_in_ONTAP
      Applies to ONTAP 9 NFSv4 and NFSv4.1 Issue When attempting to mount an NFS export via NFSv4 (or later), client fails reporting mount.nfs: Protocol not supported Utilizing the vserver export-policy che...Applies to ONTAP 9 NFSv4 and NFSv4.1 Issue When attempting to mount an NFS export via NFSv4 (or later), client fails reporting mount.nfs: Protocol not supported Utilizing the vserver export-policy check-access command reveals that access is denied to the root volume
    • Mounting NFS export with NFSv3 results in access-denied and protocol not supported
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/Mounting_NFS_export_with_NFSv3_results_in_access-denied_and_protocol_not_supported
      Unable to mount NFS share from Linux host using NFSv3, results in access-denied or protocol not supported due to F5 Load Balancer  interfering with the privileged ports
    • Client receives "Protocol not supported" attempting second NFS mount on local path
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/Client_receives_Protocol_not_supported_attempting_second_NFS_mount_on_local_path
      Applies to ONTAP 9 Issue When attempting to mount an NFS export, the mounts fails with the error "mount.nfs: Protocol not supported" Utilizing the "vserver export-policy check-access" command confirms...Applies to ONTAP 9 Issue When attempting to mount an NFS export, the mounts fails with the error "mount.nfs: Protocol not supported" Utilizing the "vserver export-policy check-access" command confirms that access is allowed for the volume Client receives "mount.nfs: Protocol not supported" when attempting a second NFS mount on a local path
    • NFSv3 mount fails with Protocol not supported
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/NFSv3_mount_fails_with_Protocol_not_supported
      Applies to ONTAP 9.15.1 NFSv3 Issue NFSv3 mount fails with error mount.nfs: Protocol not supported Example: [root@hostname /]# mount 192.168.xxx.xxx:/vol_path /mount_point mount.nfs: Protocol not supp...Applies to ONTAP 9.15.1 NFSv3 Issue NFSv3 mount fails with error mount.nfs: Protocol not supported Example: [root@hostname /]# mount 192.168.xxx.xxx:/vol_path /mount_point mount.nfs: Protocol not supported [root@hostname /]#