User guide

8–Dispersive Routing
IB0054606-02 A 8-3
 Static_Dest: The path selection is based on the CPU index of the
destination process. Multiple paths can be used if data transfer is to different
remote processes within a node. If multiple processes from Node A send a
message to a single process on Node B only one path will be used across all
processes.
 Static_Base: The only path that is used is the base path [SLID,DLID]
between nodes regardless of the LMC of the fabric or the number of paths
available. This is similar to how PSM operated till the IFS 5.1 release.
NOTE
A fabric configured with LMC of 0 even with the default adaptive policy
enabled operates as the Static_Base policy as there only exists a
single path between any pairs of port.