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12 IBM Certification Study Guide AIX HACMP
• FDDI
• SP Switch
•SLIP
•SOCC
• Token-Ring
As an independent, layered component of AIX, the HACMP for AIX software
works with most TCP/IP-based networks. HACMP for AIX has been tested
with standard Ethernet interfaces (en*) but not with IEEE 802.3 Ethernet
interfaces (et*), where * reflects the interface number. HACMP for AIX also
has been tested with Token-Ring and Fiber Distributed Data Interchange
(FDDI) networks, with IBM Serial Optical Channel Converter (SOCC), Serial
Line Internet Protocol (SLIP), and Asynchronous Transfer Mode (ATM)
point-to-point connections.
The HACMP for AIX software supports a maximum of 32 networks per cluster
and 24 TCP/IP network adapters on each node. These numbers provide a
great deal of flexibility in designing a network configuration. The network
design affects the degree of system availability in that the more
communication paths that connect clustered nodes and clients, the greater
the degree of network availability.
2.2.1.2 Special Network Considerations
Each type of interface has different characteristics concerning speed, MAC
addresses, ARP, and so on. In case there is a limitation you will have to work
around, you need to be aware of the characteristics of the adapters you plan
to use. In the next paragraphs, we summarize some of the considerations
that are known.
Hardware Address Swapping is one issue. If you enable HACMP to put one
address on another adapter, it would need something like a boot and a
service address for IPAT, but on the hardware layer. So, in addition to the
manufacturers burnt-in address, there has to be an alternate address
configured.
The speed of the network can be another issue. Your application may have
special network throughput requirements that must be taken into account.
ATM and SP Switch networks are special cases of point-to-point, private
networks that can connect clients
Note