Managing SPARC Host I/O Reconfiguration Policy

For some SPARC servers, Oracle ILOM provides a policy that enables system administrators to control whether the host IO paths are optimized and require modification at the next power on or power reset. By default, the host I/O reconfigure policy is enabled and configurable from the Oracle ILOM CLI or web interface. For further details about setting this policy in Oracle ILOM, see the following table.

Note:

Reconfiguring the I/O paths will change the PCIe addresses and external addresses associated with boot devices.

Note:

If the PCIE switches in the I/O path are not currently in use, and ioreconfigure is set to true, configure the I/O paths for maximum connectivity. Otherwise, configure the new paths for optimal I/ O bandwidth

Table 8-17 SPARC Host I/O Reconfiguration Policy Properties

User Interface Configurable Target and User Role: SP CLI: /Host (or /Servers/PDomains/PDomain_n/host) SP Web: Host Management > Host Control User Role: Reset Host Control (r) role (required to modify this property).
IO Reconfigure Policy (`ioreconfigure=`)	true	false\|true\|add_only true – When enabled, Oracle ILOM (if necessary) will check and reconfigure the I/O paths each time the server SP or PDomain is powered on or reset. Note: PCIe switches will be configured to create the minimum required number of virtual switches to connect all of the available root complexes, which might result in changes to the I/O paths. false – When enabled, Oracle ILOM will not check and reconfigure the I/O paths each time the server SP or PDomain is powered on or reset. Note: When the control domain creates its first guest domain, the IO Reconfigure Policy property is automatically set to false. add_only – When enabled and when a new CMP (root complex) has been added since the last boot or reset, Oracle ILOM will reconfigure the I/O paths for optimal bandwidth. Note: The add_only property value is only supported on Oracle SPARC T5, M5, and M6 platforms. CLI Syntax for IO Reconfigure Policy For SPARC single-server SP, type: `set /SP/Host ioreconfigure=` true\|false\|add_only For SPARC multi-domain server SP, type: `set /Servers/PDomains/PDomain_n/Host ioreconfigure=` true\|false\|add_only

User Interface Configurable Target and User Role:

SP CLI: /Host (or /Servers/PDomains/PDomain_n/host)
SP Web: Host Management > Host Control
User Role: Reset Host Control (r) role (required to modify this property).

Property Default Description

IO Reconfigure Policy

(ioreconfigure=)

true

false|true|add_only

true – When enabled, Oracle ILOM (if necessary) will check and reconfigure the I/O paths each time the server SP or PDomain is powered on or reset.

Note: PCIe switches will be configured to create the minimum required number of virtual switches to connect all of the available root complexes, which might result in changes to the I/O paths.
false – When enabled, Oracle ILOM will not check and reconfigure the I/O paths each time the server SP or PDomain is powered on or reset.

Note: When the control domain creates its first guest domain, the IO Reconfigure Policy property is automatically set to false.
add_only – When enabled and when a new CMP (root complex) has been added since the last boot or reset, Oracle ILOM will reconfigure the I/O paths for optimal bandwidth.

Note: The add_only property value is only supported on Oracle SPARC T5, M5, and M6 platforms.

CLI Syntax for IO Reconfigure Policy

For SPARC single-server SP, type:

set /SP/Host ioreconfigure= true|false|add_only

For SPARC multi-domain server SP, type:

set /Servers/PDomains/PDomain_n/Host ioreconfigure= true|false|add_only