Error Message:

NFS mount results in “vmount: operation not permitted” error

Solution:

Problem(Abstract)
Attempts to mount a remote file system from a Linux NFS server results in the error “vmount: operation not permitted”.
Symptom
Unable to mount the remote file system.
Example:
root@lpar3:/ # mount 10.5.0.5:/repository /mnt
mount: 1831-008 giving up on:
10.5.0.5:/repository
vmount: Operation not permitted.

Cause
Sometimes Linux NFS servers will do port checking and require that the NFS client use a reserved port.

Environment
AIX versions 4.x and 5.x.
Resolving the problem
Use a reserved port in the mount command:
Example:
root@lpar3:/ # nfso -o nfs_use_reserved_ports=1
Setting nfs_use_reserved_ports to 1
root@lpar3:/ # mount 10.5.0.5:/repository /mnt
Note: To make this setting permanent, use the nfso -p switch or add it to /etc/rc.local.

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