Fabric Manager Users Guide, Version 6.1, Revision A - QLogic

3–Fabric Manager Configuration
Configuring the QLogic Fabric Manager
Sm Parameters
SM Redundancy
The following tables describe parameters that can be used in the Sm subsection of
either the Common or Fm sections.
Any parameter which can be used in the Common.Shared section may also be
used in the Common.Sm or Fm.Sm sections.
The parameters in Table 3-3 control SM Failover, they complement the Priority
and ElevatedPriority parameters that are used in the Shared section and can
also be used in the Sm section if needed.
Table 3-3. Sm Redundancy Parameters
Parameter
Default
Value
Description
MasterPingInterval 5 MasterPingInterval is the interval in seconds
at which the secondary SM pings
the master (the ping occurs using an
inband SM packet).
MasterPingMaxFail 3 Number of times a secondary’s ping of
the master must fail before renegotiation
of a new master occurs.
DbSyncInterval 15 Secondary SMs will synchronize their
fabric database with the master at
DbSyncInterval minutes. If set to 0, Db
synchronization is disabled.
Fabric Routing
The following Routing Algorithms are supported
• shortestpath - pick shortest path and balance lids on ISLs
• fattree — shortest path with better balancing for fat tree topology
• SpineFirstRouting - option to avoid credit loops in complex fabrics with
QLogic Switches. Given equal length routes, routes through chassis spine
first. Hence avoids loops caused by routing via edge/leaf switches instead of
spines.
• dor-updown - Direction Ordered routing with updown. This routing algorithm
is for mesh and torus topologies. For torus topologies, dor-updown requires
2 VLs on Inter Switch Links and uses 2 dimensions SLs (limit of 4 dimensions).
When a fabric disruption occurs, an additional VL and SL is used for an
Up/Down style non-optimal routing around the failure (therefore, limited to 3
dimensions).
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