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

3–Fabric Manager Configuration
Configuring the QLogic Fabric Manager
Dynamic Packet Lifetime
DynamicPacketLifetime and PacketLifetime controls the PktLifetime
reported in PathRecord queries. PktLifetime is used by IBTA compliant
applications to set the Queue Pair timeout and retry intervals. Per the IBTA
algorithm the Queue Pair timeout will typically be two-times or four-times these
values. When DynamicPacketLifetime is enabled, the PktLifetime
reported will depend on number of switch hops. Hops01 is PktLifetime for
one-hop paths, Hops02 is two-hop paths, etc. When DynamicPacketLifetime
is disabled, the PacketLifetime is reported as the PKtLifetime for all paths.
The following is a sample of the Dynamic Packet Lifetime section of the FM
configuration file.
1s
1
67ms
134ms
134ms
268ms
268ms
268ms
268ms
536ms
536ms
The parameters in Table 3-15 define Packet Lifetime values based on HopCount
of the path.
Table 3-15. Sm DynamicPacketLifetime Parameters
Parameter
Default
Value
Description
Enable 1 Enables or disables the use of dynamic
packet lifetime. This provides a convenient
way to disable this section without
needing to delete it from the configuration
file
Hops01 67ms Packet Lifetime for one-hop paths
Hops02 134ms Packet Lifetime for two- hop paths
Hops03 134ms Packet Lifetime for three-hop paths
Hops04 268ms Packet Lifetime for four-hop paths
IB0054608-01 B 3-41