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Example: Configuring the VXFEN Parameters

To change the VXFEN tunable parameter, use the chdev command, unload the driver, and reload the driver. Change the parameter on each cluster system. The example procedure changes the value of the vxfen_min_delay parameter.

 To change the VXFEN tunable parameter

1. Check the status of the driver and start it if necessary:

   # /etc/methods/vxfenext -status

   To start the driver:

   # /etc/init.d/vxfen.rc start

2. List the current value of the tunable parameter:

   # lsattr -El vxfen

   vxfen_min_delay=0

   The current value is 1 (the default).

3. Enter:

   # chdev -l vxfen -P -a vxfen_min_delay=30

4. Ensure that Storage Foundation is shut down. Unload and reload the driver after changing the value of the tunable:

   # /etc/methods/vxfenext -stop

   # /etc/methods/vxfenext -start

5. Perform the commands on each cluster system to change the parameter.