Unable to set custom 'dev_loss_tmo' value in RHEL7

Issue

• The value of dev_loss_tmo is set to 20 but still getting the 50 in the output of below command:

  $ less /etc/multipath.conf
  [...]
  defaults {
          user_friendly_names     yes
          fast_io_fail_tmo        10
          dev_loss_tmo            20   ###
  }
  [...]
  
  $ for f in /sys/class/fc_remote_ports/rport-*/dev_loss_tmo; do d=$(dirname $f); echo $(basename $d):$(cat $d/node_name):$(cat $f); done
  rport-7:0-2:0x50020e8020144afa:50   <---
  rport-7:0-3:0x50020e8020144af2:50   <---
  rport-8:0-2:0x50020e8020144afb:50   <---
  rport-8:0-3:0x50020e8020144af3:50   <---
  

• How is the value of dev_loss_tmo calculated in RHEL 7 ?