Configuring a device for virtual IP address (VIPA)
You can configure a device for VIPA if the layer2 option is not enabled. If you enabled the layer2 option, you can configure for VIPA as you would in a distributed server environment.
Before you begin
Virtual IP address (VIPA) can be configured only if the kernel was compiled with the common code configuration option CONFIG_DUMMY.
About this task
For information about the layer2 option, see MAC headers in layer 2 mode.
IBM Z® uses VIPAs to protect against certain types of
hardware connection failure. You can assign VIPAs that are independent from particular adapter.
VIPAs can be built under Linux® using dummy
devices (for example, dummy0
or dummy1
).
The qeth device driver maintains a list of VIPAs that the OSA-Express adapter accepts for each qeth group device. Use the qethconf utility to add or remove VIPAs (see qethconf - Configure qeth devices).
For an example of how to use VIPA, see Scenario: VIPA – minimize outage due to adapter failure.
Be aware of Confirming that an IP address has been set under layer 3 when you work with VIPAs.