AMX Rack Rail Kit MMS Servers Specifications download pdf (Page 97)

Chapter 3. Virtualization 83

Draft Document for Review September 2, 2008 5:05 pm 4405ch03 Virtualization.fm

Figure 3-3 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, it is possible for a

single physical Ethernet to be shared between 320 internal VLAN. 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 as there are no configuration limits.

Unicast, broadcast, and multicast is 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 across

an SEA.

For a more detailed discussion about virtual networking, see:

http://www.ibm.com/servers/aix/whitepapers/aix_vn.pdf

Note: A Shared Ethernet Adapter does not need to have an IP address configured to be

able to perform the Ethernet bridging functionality. It is very convenient to configure IP on

the Virtual I/O Server. This is because the Virtual I/O Server can then be reached by

TCP/IP, for example, to perform dynamic LPAR operations or to enable remote login. This

can be done either by configuring an IP address directly on the SEA device, or on an

additional virtual Ethernet adapter in the Virtual I/O Server. This leaves the SEA without

the IP address, allowing for maintenance on the SEA without losing IP connectivity in case

SEA failover is configured.

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AMX Rack Rail Kit MMS Servers Specifications Page 97