FICON Channel Extension Guidelines
B
This appendix provides information about FICON channel extensions for the VSM system. Content includes:
•“Definition of Terms” on page
•“General Channel Extension Considerations”, including:
-“Understand Channel Extension Performance Limitations” on page
-“Channel Extenders Are Invisible to Other Devices” on page
-“Channel Extenders Can Cause Timing Problems” on page
-“Channel Extenders Can Insert Fake I/O Errors” on page
-“Avoid RECLAIMs and DRAINs on
-“Avoid RECALLs on
-“Avoid Syncsort Apps That Use Long Chains on
•“FICON Topologies” on page
•“Placement of Extension Equipment” on page
•“Interoperability Testing” on page
•“FICON Channel Extension – Sample Configurations” on page
•“McData/CNT Channel Extension Interoperability”, including:
-“Set
-“Set
-“Set Extension Ports to Fixed Speeds When Extending a
-“ISL Failover Is Supported Only in Shuttle Mode” on page
-“Avoiding Host Protocol Timeouts” on page
-“Performance Considerations” on page
•“Cisco Systems Channel Extension Interoperability” on page
Note: Always consult your selected vendor’s release documentation for their extension products, and guidelines for proper application of those products.
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