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16
IBM Rack Console Switch Installation and User's Guide
3.
On a UCO connected to a server that is either already connected to an ARI port or daisy-
chained, attach one end of a CAT 5 cable to the second RJ-45 connector.
4.
Attach the other end of the CAT 5 cable to the first RJ-45 connector on a UCO connected to an
additional server.
5.
Repeat steps 3 and 4 for all servers to be daisy chained.
6.
When you reach the end of the chain, attach a terminator to the second RJ-45 connector on the
last UCO in the chain.
7.
Turn on the servers, and then turn on the rack console switch.
Tiering Rack Console Switches
You can tier multiple rack console switches to enable access to additional servers. In a tiered
system, the ARI port on the main rack console switch connects to the ACI port of a tiered rack
console switch. A tiered 1 x 8 switch can then be connected to up to 8 servers, and a tiered 2 x 16
switch can then be connected to up to 16 servers. Only one level of tiering is supported.
The following table shows possible tiering combinations of the IBM Rack Console Switch with the
maximum number of servers in each configuration.
Table 2.1: Tiering of rack console switches
Primary Switch
IBM 1 x 8 Rack Console Switch
IBM 1 x 8 Rack Console Switch
IBM 2 x 16 Rack Console Switch
IBM 2 x 16 Rack Console Switch
The example in Figure 2.4 shows the maximum configuration with one 2 x 16 rack console switch
tiered under a main 2 x 16 rack console switch, enabling the connection of up to 15 primary servers
and 16 secondary servers. In this type of tiering configuration, you can tier up to 16 rack console
switches under the main rack console switch, enabling the connection of up to 256 servers. In this
configuration, the tiered local port OSCAR interface is disabled when the main rack console switch
is tiered below another rack console switch.
Secondary Switch
IBM 1 x 8 Rack Console Switch
IBM 2 x 16 Rack Console Switch
IBM 1 x 8 Rack Console Switch
IBM 2 x 16 Rack Console Switch
Maximum Servers
64
128
128
256
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