Specifications

Chapter 3. Virtualization 91
Draft Document for Review May 12, 2014 12:46 pm 5102ch03.fm
Because the Virtual I/O Server is an operating system-based appliance server, redundancy
for physical devices attached to the Virtual I/O Server can be provided by using capabilities
such as Multipath I/O and IEEE 802.3ad Link Aggregation.
Installation of the Virtual I/O Server partition is performed from a special system backup DVD
that is provided to clients who order any PowerVM edition. This dedicated software is only for
the Virtual I/O Server, and is supported only in special Virtual I/O Server partitions. Three
major virtual devices are supported by the Virtual I/O Server:
򐂰 Shared Ethernet Adapter
򐂰 Virtual SCSI
򐂰 Virtual Fibre Channel adapter
The Virtual Fibre Channel adapter is used with the NPIV feature, described in 3.4.8,
“Operating system support for PowerVM” on page 96.
Shared Ethernet Adapter
A Shared Ethernet Adapter (SEA) can be used to connect a physical Ethernet network to a
virtual Ethernet network. The Shared Ethernet Adapter provides this access by connecting
the POWER Hypervisor VLANs with the VLANs on the external switches. Because the
Shared Ethernet Adapter processes packets at layer 2, the original MAC address and VLAN
tags of the packet are visible to other systems on the physical network. IEEE 802.1 VLAN
tagging is supported.
The Shared Ethernet Adapter also provides the ability for several client partitions to share one
physical adapter. With an SEA, you can connect internal and external VLANs by using a
physical adapter. The Shared Ethernet Adapter service can be hosted only in the Virtual I/O
Server, not in a general-purpose AIX or Linux partition, and acts as a layer-2 network bridge
to securely transport network traffic between virtual Ethernet networks (internal) and one or
more (EtherChannel) physical network adapters (external). These virtual Ethernet network
adapters are defined by the POWER Hypervisor on the Virtual I/O Server.