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Oracle VM Server for SPARC 2.0 Administration Guide
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Document Information


1.  Overview of the Oracle VM Server for SPARC Software

2.  Installing and Enabling Software

3.  Security

4.  Setting Up Services and the Control Domain

5.  Setting Up Guest Domains

6.  Setting Up I/O Domains

7.  Using Virtual Disks

8.  Using Virtual Networks

Introduction to a Virtual Network

Virtual Switch

Virtual Network Device

Managing a Virtual Switch

Add a Virtual Switch

Set Options for an Existing Virtual Switch

Remove a Virtual Switch

Managing a Virtual Network Device

Add a Virtual Network Device

Set Options for an Existing Virtual Network Device

Remove a Virtual Network Device

Virtual Device Identifier and Network Interface Name

Find Oracle Solaris OS Network Interface Name

Assigning MAC Addresses Automatically or Manually

Range of MAC Addresses Assigned to Logical Domains

Automatic Assignment Algorithm

Duplicate MAC Address Detection

Freed MAC Addresses

Using Network Adapters With Logical Domains

Determine If a Network Adapter Is GLDv3-Compliant

Configuring Virtual Switch and Service Domain for NAT and Routing

Set Up the Virtual Switch to Provide External Connectivity to Domains

Configuring IPMP in a Logical Domains Environment

Configuring Virtual Network Devices Into an IPMP Group in a Domain

Configuring and Using IPMP in the Service Domain

Using Link-Based IPMP in Logical Domains Virtual Networking

Configure Physical Link Status Updates

Configuring and Using IPMP in Releases Prior to Logical Domains 1.3

Configuring IPMP in the Guest Domain

Configuring IPMP in the Service Domain

Using VLAN Tagging



Assign VLANs to a Virtual Switch and Virtual Network Device

Install a Guest Domain When the Install Server Is in a VLAN

Using NIU Hybrid I/O

Configure a Virtual Switch With an NIU Network Device

Enable Hybrid Mode

Disable Hybrid Mode

Using Link Aggregation With a Virtual Switch

Configuring Jumbo Frames

Configure Virtual Network and Virtual Switch Devices to Use Jumbo Frames

Compatibility With Older (Jumbo-Unaware) Versions of the vnet and vsw Drivers

9.  Migrating Domains

10.  Managing Resources

11.  Managing Configurations

12.  Performing Other Administration Tasks

A.  Oracle VM Server for SPARC Physical-to-Virtual Conversion Tool

B.  Oracle VM Server for SPARC Configuration Assistant

C.  Logical Domains Manager Discovery

D.  Using the XML Interface With the Logical Domains Manager

E.  Logical Domains Manager XML Schemas



Using NIU Hybrid I/O

The virtual I/O framework implements a hybrid I/O model for improved functionality and performance. The hybrid I/O model combines direct and virtualized I/O to allow flexible deployment of I/O resources to virtual machines. It is particularly useful when direct I/O does not provide full capability for the virtual machine, or direct I/O is not persistently or consistently available to the virtual machine. This could be because of resource availability or virtual machine migration. The hybrid I/O architecture is well-suited for the Network Interface Unit (NIU) on Sun UltraSPARC T2 and SPARC T3 platforms. An NIU is a network I/O interface that is integrated on chip. This architecture enables the dynamic assignment of Direct Memory Access (DMA) resources to virtual networking devices and, thereby, provides consistent performance to applications in the domain.

NIU hybrid I/O is available for Sun UltraSPARC T2 and SPARC T3 platforms. This feature is enabled by an optional hybrid mode that provides for a virtual network (vnet) device where the DMA hardware resources are loaned to a vnet device in a guest domain for improved performance. In the hybrid mode, a vnet device in a guest domain can send and receive unicast traffic from an external network directly into the guest domain using the DMA hardware resources. The broadcast or multicast traffic and unicast traffic to the other guest domains in the same system continue to be sent using the virtual I/O communication mechanism.

Note - NIU hybrid I/O is not available on UltraSPARC T2 Plus platforms.

Figure 8-7 Hybrid Virtual Networking

Diagram shows hybrid virtual networking as described in the text.

The hybrid mode applies only for the vnet devices that are associated with a virtual switch (vsw) configured to use an NIU network device. As the shareable DMA hardware resources are limited, up to only three vnet devices per vsw can have DMA hardware resources assigned at a given time. If more than three vnet devices have the hybrid mode enabled, the assignment is done on a first-come, first-served basis. As there are two NIU network devices in a system, there can be a total of six vnet devices on two different virtual switches with DMA hardware resources assigned.

Following are points you need to be aware of when using this feature:

Configure a Virtual Switch With an NIU Network Device

  1. Determine an NIU network device.

    The following example shows the output on an UltraSPARC T2 server:

    # grep nxge /etc/path_to_inst
    "/niu@80/network@0" 0 "nxge"
    "/niu@80/network@1" 1 "nxge"

    The following example shows the output on a SPARC T3-1 server:

    # grep nxge /etc/path_to_inst
    "/niu@480/network@0" 0 "nxge"
    "/niu@480/network@1" 1 "nxge"
  2. Configure a virtual switch.
    # ldm add-vsw net-dev=nxge0 primary-vsw0 primary

Enable Hybrid Mode

Disable Hybrid Mode