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

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3–Fabric Manager Configuration Configuring the QLogic Fabric Manager Fabric Programming SwitchLifetime, HoqLife, and VLStallCount can be used to relieve fabric congestion and avoid fabric deadlocks by discarding packets. Discards help prevent back pressure from propagating deep into the core of the fabric, however such discards will cause end nodes to need to timeout and retransmit. If a packet stays at the Head of a Switch Egress Port for more than HoqLife, it is discarded. Similarly a packet queued in a switch for more than SwitchLifetime is discarded. Specified as integer time using ns, us, ms, s, m, or h as units. SwitchLifetime and HoqLife can also be set to infinite. VLStallCount controls a second tier more aggressive discard. If VlStallCount packets in a row are discarded due to HoqLife by a given VL on an egress port. That egress port's VL enters the VL Stalled State and discards all that VL's egress packets for 8*HoqLife. Packets discarded for any of these reasons will be included in the TxDiscards counter which is queryable via FastFabric. The parameters in Table 3-10 control Fabric Configuration and Programming. Table 3-10. Sm Fabric Configuration Parameters Parameter Default Value Description SmKey 0 64-bit key of SM, redundant SMs must have same key MKey 0 64-bit mkey to secure SMA ports this SM manages SwitchLifetime 33ms A packet queued in a switch for more than SwitchLifetime is discarded. Specified as integer time using ns, us, ms, s, m, or h as units. Can also be set to infinite HoqLife 8ms If a packet stays at the Head of a Switch Egress Port for more than HoqLife, it is discarded. Specified as integer time using ns, us, ms, s, m, or h as units. Can also be set to infinite VlStallCount 7 Controls a second tier more aggressive discard. If VlStallCount packets in a row are discarded due to HoqLife by a given VL on an egress port. That egress port's VL enters the VL Stalled State and discards all that VL's egress packets for 8*HoqLife. 3-30 IB0054608-01 B
3–Fabric Manager Configuration Configuring the QLogic Fabric Manager Table 3-10. Sm Fabric Configuration Parameters (Continued) Parameter Default Value Description CongestionControl 0 Configures support for IBTA Congestion Control AdaptiveRouting Configures support for AdaptiveRouting in QLogic QDR Switches. For Adaptive Routing configuration information refer to Adaptive Routing SaRespTime 1s maximum anticipated SA response time PacketLifetime 1s When DynamicPacketLifetime is disabled, the PacketLifetime is reported as the PKtLifetime for all paths DynamicPacketLifetime Configures support for DynamicPacketLifetime. For Dynamic Packet Lifetime configuration information refer to Table 3-15. SmaBatchSize 4 Max parallel requests to a given SMA IB0054608-01 B 3-31
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User Guide Fabric Manager 7.0.1 IB0
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Table of Contents Preface Intended
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Fabric Manager 7.0.1 User Guide Fab
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Fabric Manager 7.0.1 User Guide 4 V
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Fabric Manager 7.0.1 User Guide D E
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Preface Intended Audience This manu
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For details about available service
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1 Overview of the QLogic Fabric Man
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1-Overview of the QLogic Fabric Man
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2 Advanced Fabric Manager Capabilit
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2-Advanced Fabric Manager Capabilit
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4-Virtual Fabrics Configuration
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5 Embedded Fabric Manager Commands
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5-Embedded Fabric Manager Commands
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6 Installation and Set Up Installin
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A Fabric Manager Command Line Inter
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A-Fabric Manager Command Line Inter
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B QLogic Fabric Manager Log Message
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B-QLogic Fabric Manager Log Message
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C Mapping Old Parameters Versions o
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C-Mapping Old Parameters Old SM Par
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C-Mapping Old Parameters Old SM Par
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C-Mapping Old Parameters Old PM Par
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C-Mapping Old Parameters Old BM Par
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D QOS Options in a Mesh/Torus vFabr
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E ./INSTALL Syntax Syntax ./INSTALL
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Corporate Headquarters QLogic Corpo
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Fabric Manager Users Guide, Version 6.1, Revision A - QLogic

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