IBM Power 750 - Page 146

132 IBM Power 750 and 760 Technical Overview and Introduction
Figure 3-11 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 3-11 Architectural view of a Shared Ethernet Adapter
A single SEA setup can have up to 16 virtual Ethernet trunk adapters; 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.
Tip: A Linux partition can provide bridging function also, by using the brctl command.
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.)