Best way to check is that IO fencing actually uses a GAB port.

If you run

gabconfig -a

you should see port "b" being used. If you have 2 nodes, you should see
membership for both (normally something like 01 for both nodes or ;1
would mean only 1 node is present)


Another way is to run vxfenadm -d

Big issue with that is that you will have to run it on each of the nodes
while gabconfig (run from any node) will tell you immediately


yu wrote:
> Hi,
>
> How to check I/O fencing is running or not on both of nodes ( 2 servers
> cluster)?vxfen can start and stop I/O fencing driver. But how to I know the
> driver has been started already/
>
> Many thanks
>
> YU