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

To delete and add a different type of card which can be claimed by the same or different driver.
Operation Performed:
# olrad –C | -r | -d <slot id>
Criticality reported by CRA:
CRA_WARNING
Explanation and user action required:
The olrad(1M) command with –C option reports the resource usage and its criticality.
The above olrad(1M) operations with –r or –d option will make alteration or reduction of the NIC
ports in the link aggregate, which may result in reduction of the available network I/O bandwidth of
the APA group and also possibly may impact LAN failover capability.
Because of the above reasons, the CRA will allow the requested olrad operations with a WARNING.
If any of these operations must be performed for system administration purposes without degrading
the link aggregate bandwidth or without compromising the LAN failover capability, before
proceeding with the intended olrad operations, the user must configure additional LAN ports from
alternative NICs into the affected APA group.
Scenario 9
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 a single multi-port NIC.
User Scenario:
Replace the card with another card of same model.
Or
To delete and add a different type of card which can be claimed by the same or different driver.
Operation Performed:
# olrad –C | -r | -d <slot id>
Criticality reported by CRA:
CRA_DATA_CRITICAL
Explanation and user action required:
The olrad(1M) command with –C option reports the resource usage and its criticality.
The above operations with olrad(1M) with –r or –d option (if it were to be allowed) will make the
system inaccessible to the network. This 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 olrad operations will not be allowed by CRA to proceed
and the operation will fail with CRA_DATA_CRITICAL error.
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 olrad command.
If any of these operations must be performed for system administration purposes without degrading
the link aggregate bandwidth or without compromising the LAN failover capability, before
proceeding with the intended olrad operations, the user must configure additional LAN ports from
alternative NICs into the affected APA group.
Scenario 10
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, some of
which controlled by different NIC driver.
24