Setup guide

7-5
Fast Ethernet Interconnect Requirements
Advanced switch usage
When two fast ethernet interconnects are ordered between the same group of nodes, two
cross–over Ethernet RJ45/RJ45 cables (CBLG161–1900), if provided, can be used to
establish a resilient link pair between the two switches, and to set up in that way a
redundant interconnect. Refer to SuperStack II Fast Ethernet Switch User Guide to
configure them. The use of such a redundant interconnect is not supported by the Oracle
Parallel Server, and it is restricted to Client / Server applications which are aware of
HACMP behaviour.
n HACMP environment, PCI and MCA 10/100 Mb/s adapters must NOT be left with
standard setup ”Auto Detection”. This may cause AIX system to be very slow when adapter
is not connected to network equipment and will cause ”network_down” or ”swap_adapter”
HACMP events. So you have to configure them to the exact speed 10BaseT or
100BaseTX.
By setting a link (a cross–over Ethernet cable CBLG161–1900) between the Cluster
administration Hub and the fast ethernet switch, in–band (Web) management of the switch
can also be performed from the Powerconsole GUI.
If the fast ethernet interconnect links all the Escala EPC nodes (single–adapter per node
case only), it can act as the administration network. It is no longer necessary to get a
Cluster administration Hub.
Cabling Diagrams
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Figure 35. INTCF01/INTCF09: Ethernet Single Interconnect for 2 Nodes
Ethernet 10/100 adapters must be configured at 100 Mbps Full duplex using smit chgenet.
Regarding Half or Full Duplex consideration:
• Half Duplex must be used for connections including hubs (not switches) and more than
two hosts on the network