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Installation and Configuration 82
3.5.1 Determining the Switch Connection for a Dependent Node
The SP Switch Router Adapter connection replaces an SP node connection
to the SP Switch. Each SP Switch Router Adapter media card is referred to
as a dependent node, and is assigned a node number that corresponds to its
specific connection on the SP Switch.
The node number is determined by the SP system administrator based on an
understanding of how node numbers are assigned in the SP System and the
rules for choosing a valid, unused SP Switch port.
See Figure 32 on page 83 for a brief overview of how Switch port numbers
are assigned and how to look for the best suited port number for the actual
scenario.
Note:
Look out for the change in numbering regarding Frame n+2 and
Frame n+3!
See Figure 33 on page 84 on how node numbers are assigned independent
of whether the frame is fully populated.
If proper planning has been done to assign the node number, the system
administrator knows which SP frame, Switch board, and node slot
corresponds to a dependent node. Given this information, you can determine
which jack on the Switch board should be used by consulting the Switch
Cable Charts for the SP Switch in
RS/6000 SP: Maintenance Information,
Volume 1, Installation and Customer Engineer Operations
, GC23-3903.
Do not attempt to connect an SP Switch Router Adapter to the SP Switch until
proper planning has been done to assign the node number.
Once the node number is assigned, the SP system administrator can define
the corresponding dependent node using SMIT as described in the
"Managing Extension Nodes" section of
RS/6000 SP: Administration Guide
Version 2 Release 4,
GC23-3897.
After defining new dependent nodes on the SP, the administrator should use
the
Eannotator command to annotate the SP Switch topology file. With the file
annotated, even if the administrator is not sure of the frame, switch board, or
node slot for the dependent node, you can determine the corresponding
switch connection with the procedure described in Section 3.5.2, “Procedure
to Get the Jack Number” on page 84.