Interface Card Critical Resource Analysis(CRA) Whitepaper for HP-UX 11i v3

Explanation and user action required:

The above nwmgr(1M) operations with –-delete option (if it were to be allowed) will delete the NIC

ports in the link aggregate, which may result in network applications running on the system hanging,

inaccessible to the network client applications, leading to application downtime or any other

indeterminate system state.

Because of the above reasons, the requested nwmgr operation will not be allowed by CRA to

proceed and the operation will fail with CRA_DATA_CRITICAL error.

To check the resource usage over APA, run the following nwmgr command with the –-cra option:

#nwmgr –cra –c lan<apa_ppa>

However, if the user wants to override the CRA criticality report, he can do so at his own risk by using

the –f option of the nwmgr command.

If the user wants to perform the delete operation for system administration purposes without impacting

system availability, re-assign the IP address on another NIC port or the APA interface.

Scenario 13

System Configuration:

HP-UX system is running with IP address assigned to an APA (Auto-port

Aggregation) group and the link aggregate contains LAN ports from two or more NICs.

User Scenario:

Reset the NIC ports in the APA interface.

Operation Performed:

#nwmgr --reset –c lan<apa_ppa>

Criticality reported by CRA:

CRA_DATA_CRITICAL

Explanation and user action required:

The above nwmgr(1M) operations with --reset option (if it were to be allowed) will reset the NIC ports

in the link aggregate, which may result in network applications running on the system hanging,