CIFS shares show up in "df -l" output, which should exclude network mounts

Issue

• The df -l command is supposed to exclude network shares:

  -l, --local
              limit listing to local file systems

• However it does not always exclude CIFS shares:

 # df -kP
 Filesystem                      1024-blocks     Used Available Capacity Mounted on
 /dev/mapper/vg_unused-lv_root       8813300  1382648   6982960      17% /
 tmpfs                                251128        0    251128       0% /dev/shm
 /dev/vda1                            495844    56354    413890      12% /boot
 \\server.usersys.redhat.com/cifs   51606140 35952804  13031896      74% /mnt

 # df -kPl
 Filesystem                      1024-blocks     Used Available Capacity Mounted on
 /dev/mapper/vg_unused-lv_root       8813300  1382648   6982960      17% /
 tmpfs                                251128        0    251128       0% /dev/shm
 /dev/vda1                            495844    56354    413890      12% /boot
 \\server.usersys.redhat.com/cifs   51606140 35952804  13031896      74% /mnt