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4 IBM 9077 SP Switch Router: Get Connected to the SP Switch
• The fault service daemon runs on all switch nodes in the RS/6000 SP, but
not on the dependent node. Therefore, the dependent node does not have
the full functionality of a normal RS/6000 SP Switch node.
• The dependent node requires the SP Switch’s primary node to compute its
switch routes. Therefore, the primary node must have at least PSSP 2.3
installed, otherwise the dependent node cannot work with the RS/6000
SP.
• In the RS/6000 SP, SP Switch nodes occasionally send service packets
from one node to the next to keep track of status and links. Sometimes
these packets are sent indirectly through another switch node. As the
dependent node is not a standard RS/6000 SP Switch node, it cannot be
used to forward service packets to other nodes.