PowerHA for AIX

Hi all,

Has the MONITOR_INTERFACE parameter been moved in 7.2.6?

Didn't find any info regarding this on the Knowledge Center / Release Notes, but whereas 7.2.5 cluster shows:

clmgr -a MONITOR_INTERFACE query cluster

MONITOR_INTERFACES="Enabled"

..on 7.2.6 it says

clmgr -a MONITOR_INTERFACE query cluster

ERROR: unrecognized or ambiguous cluster attribute: MONITOR_INTERFACE

Br,

t

removed.

# clmgr mod cluster monitor_interfaces=enable 

ERROR: an unrecognized "modify cluster" option was detected:  MONITOR_INTERFACES

Hi Andrey,

Thanks for reply / confirmation. :D 

Br,

tommi

# clmgr mod cluster monitor_interfaces=enable ERROR: an unrecognized "modify cluster" option was detected:  MONITOR_INTERFACES

Hi,

Monitoring of network interfaces in PowerHA is enabled by default, which can be quite problematic because the cluster responds to the lack of network traffic on interfaces (PowerHA considers an interface without network traffic as a failure).
If, for some reason, a network interface does not have network traffic, the cluster might try to perform switchover the associated Resource Group.
I suspect your question might be related to looking for a solution to prevent monitoring of the interface.

In cases where a network interface is not used as the primary interface for communication with the database/application and serves, for example, only for backups, is in a restricted VLAN, or has only temporary network traffic, disabling monitoring by the cluster may be justified.

Unfortunately, as far as I know, the option MONITOR_INTERFACE is no longer possible to set, but there is a solution to this problem.

To prevent switching of the Resource Group as a result of no network traffic for a network interface, you can change "Action on Resource Failure" from "fallover" to "notify".

This can be done in the following way:

smitty sysmirror --> Custom Cluster Configuration --> Resources --> Customize Resource Recovery --> select resource --> change "Action on Resource Failure" from fallover to notify

                                                      [Entry Fields]
Resource Name                                       example_of_service_IP_label
Action on Resource Failure                          notify             
Notify Method                                      []
Resource / Monitor Type                             selective_fallover

I hope this can be helpful