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Oracle® VM Server for SPARC 3.6 Administration Guide

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Updated: September 2019
 
 

Fibre Channel Device Class-Specific Properties

You can use the ldm create-vf or the ldm set-io commands to set the following Fibre Channel virtual function properties:

bw-percent

Specifies the percentage of the bandwidth to be allocated to the Fibre Channel virtual function. Valid values are from 0 to 100. The total bandwidth value assigned to a Fibre Channel physical function's virtual functions cannot exceed 100. The default value is 0 so that the virtual function gets a fair share of the bandwidth that is not already reserved by other virtual functions that share the same physical function.

node-wwn

Specifies the node world-wide name (WWN) for the Fibre Channel virtual function. Valid values are non-zero. By default, this value is allocated automatically. If you manually specify this value, you must also specify a value for the port-wwn property. For more information, see World-Wide Name Allocation for Fibre Channel Virtual Functions.

port-wwn

Specifies the port WWN for the Fibre Channel virtual function. Valid values are non-zero. By default, this value is allocated automatically. If you manually specify this value, you must also specify a value for the node-wwn property. For more information, see World-Wide Name Allocation for Fibre Channel Virtual Functions.

You cannot modify the node-wwn or the port-wwn property values while the Fibre Channel virtual function is in use. However, you can modify the bw-percent property value dynamically even when the Fibre Channel virtual function is in use.

World-Wide Name Allocation for Fibre Channel Virtual Functions

The Logical Domains Manager supports both the automatic allocation and the manual assignment of world-wide names for the Fibre Channel virtual functions.

Automatic World-Wide Name Allocation

Logical Domains Manager allocates a unique MAC address from its automatic MAC address allocation pool and creates IEEE format node-wwn and port-wwn property values.

port-wwn = 10:00:XX:XX:XX:XX:XX:XX
node-wwn = 20:00:XX:XX:XX:XX:XX:XX

XX:XX:XX:XX:XX:XX is the automatically allocated MAC address.

This automatic allocation method produces unique WWNs when the control domains of all systems that are connected to the same Fibre Channel fabric are also connected by Ethernet and are part of the same multicast domain. If you cannot meet this requirement, you must manually assign unique WWNs, which is required on the SAN.

Manual World-Wide Name Allocation

You can construct unique WWNs by using any method. This section describes how to create WWNs from the Logical Domains Manager manual MAC address allocation pool. You must guarantee the uniqueness of the WWNs you allocate.

Logical Domains Manager has a pool of 256,000 MAC addresses that are available for manual allocation in the 00:14:4F:FC:00:00 - 00:14:4F:FF:FF:FF range.

The following example shows the port-wwn and node-wwn property values based on the 00:14:4F:FC:00:01 MAC address:

port-wwn = 10:00:00:14:4F:FC:00:01
node-wwn = 20:00:00:14:4F:FC:00:01

00:14:4F:FC:00:01 is the manually allocated MAC address. For information about automatic MAC address allocation, see Assigning MAC Addresses Automatically or Manually.


Note - It is best to manually assign the WWNs to ensure predictable configuration of the SAN storage.

You must use the manual WWN allocation method when all systems are not connected to the same multicast domain by Ethernet.

Use this method to guarantee that the same WWNs are used when Fibre Channel virtual functions are destroyed and re-created. Automatically allocated WWNs are not saved for later recovery.