IBM RS/6000 SP, Problem Determination Manual

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10. The primary node updates the SDR switch_responds class for its partition.
For each node in the partition, the ( autojoin,isolated)-pair is set to one of the
following:
(0,0) Initial
(0,1) Fenced
(1,0) On
(1,1) Suspended
4.6 Reviewing Switch Processes
Figure 53. The High Performance Switch Board
fault_service_Worm_RTG
The Worm daemon is central to the functioning of the switch. It can be viewed
as having two main personalities:
• Primary Worm
•
Secondary Worm
There is a third personality with the SP Switch:
•
Primary backup Worm
The primary Worm has a key role to play in the coordination of the switch
network. It is responsible for generating and updating the route tables through
the Route Table Generator(RTG), and for handling and recovering from switch
faults generated on the network. Switch faults are generated for a number of
reasons. For example, corrupted data packets, hardware faults, and running
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SP PD Guide