Specifications

5102ch03.fm Draft Document for Review May 12, 2014 12:46 pm
92 IBM Power System S822 Technical Overview and Introduction
Figure 3-10 shows a configuration example of an SEA with one physical and two virtual
Ethernet adapters. An SEA can include up to 16 virtual Ethernet adapters on the Virtual I/O
Server that share the same physical access.
Figure 3-10 Architectural view of a Shared Ethernet Adapter
A single SEA setup can have up to 16 virtual Ethernet trunk adapters and each virtual
Ethernet trunk adapter can support up to 20 VLAN networks. Therefore, a possibility is for a
single physical Ethernet to be shared between 320 internal VLAN networks. The number of
shared Ethernet adapters that can be set up in a Virtual I/O Server partition is limited only by
the resource availability, because there are no configuration limits.
Unicast, broadcast, and multicast are supported, so protocols that rely on broadcast or
multicast, such as Address Resolution Protocol (ARP), Dynamic Host Configuration
Protocol (DHCP), Boot Protocol (BOOTP), and Neighbor Discovery Protocol (NDP), can
work on an SEA.
Virtual SCSI
Virtual SCSI is used to see a virtualized implementation of the SCSI protocol. Virtual SCSI is
based on a client/server relationship. The Virtual I/O Server logical partition owns the physical
resources and acts as a server or, in SCSI terms, a target device. The client logical partitions
access the virtual SCSI backing storage devices provided by the Virtual I/O Server as clients.
The virtual I/O adapters (virtual SCSI server adapter and a virtual SCSI client adapter) are
configured using a managed console or through the Integrated Virtualization Manager on
VIOS
Client 1
Ethernet
switch
VLAN=2 PVID=1
ent3
(sea)
en3
(if.)
en0
(if.)
Client 2
ent0
(virt.)
VLAN=2
PVID=2
PVID=99
VID=2
PVID=1 PVID=1 PVID=1
VLAN=1
Hypervisor
External
Network
ent0
(phy.)
en0
(if.)
ent0
(virt.)
Client 3
en0
(if.)
ent0
(virt.)
ent1
(virt.)
ent2
(virt.)