
Chapter 4. System planning and configuration using VIOS with IVM 103
Figure 4-15 HEA Port Properties, Connected Partitions
4.5.2 Virtual Ethernet Adapters and SEA
Virtual adapters exist in the hypervisor that allows LPARs to communicate with
each other without the need for a physical network. They can be created for each
partition provided by the hypervisor.
Four virtual Ethernet adapters are created by default on the VIOS, and two each
for every logical partition. Additional virtual adapters can be created on both the
VIOS and logical partitions.
A Shared Ethernet Adapter (SEA) is a new virtual adapter is created by bridging
between a physical adapter (HEA port or expansion card port) and a virtual
adapter on the VIOS. A SEA adapter can also be created by bridging between an
EtherChannel adapter and a virtual adapter. The SEA interface can then be
mapped to logical partitions, thus providing network connectivity outside of the
VIOS and logical partition.
For a HEA adapter port to participate in an SEA Ethernet bridge, the
configuration of the port must be changed. The configuration is changed by
ensuring that the box Allow virtual Ethernet bridging on the HEA Physical Port
Properties window is checked, as shown in Figure 4-16 on page 104.This setting
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