Front cover FICON Native Implementation and Reference Guide Architecture, terminology, and topology concepts Planning, implemention, and migration guidance Realistic examples and scenarios Bill White JongHak Kim Manfred Lindenau Ken Trowell ibm.com/redbooks International Technical Support Organization FICON Native Implementation and Reference Guide October 2002 SG24-6266-01 Note: Before using this information and the product it supports, read the information in “Notices” on page vii. Second Edition (October 2002) This edition applies to FICON channel adaptors installed and running in FICON native (FC) mode in the IBM zSeries procressors (at hardware driver level 3G) and the IBM 9672 Generation 5 and Generation 6 processors (at hardware driver level 26). © Copyright International Business Machines Corporation 2001, 2002. All rights reserved. Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Notices . vii Trademarks . viii Preface . ix The team that wrote this redbook. ix Become a published author . .x Comments welcome. .x Chapter 1. Overview . 1 1.1 How to use this redbook . 2 1.2 Introduction to FICON . 2 1.3 zSeries and S/390 9672 G5/G6 I/O connectivity. 3 1.4 zSeries and S/390 FICON channel benefits . 5 Chapter 2. FICON topology and terminology . 9 2.1 Basic Fibre Channel terminology . 10 2.2 FICON channel topology. 12 2.2.1 Point-to-point configuration . 14 2.2.2 Switched point-to-point configuration . 15 2.2.3 Cascaded FICON Directors configuration. 16 2.3 Access control. 18 2.4 Fibre Channel and FICON terminology. 20 2.4.1 Point-to-point connection terms . 21 2.4.2 Switched topology connection terms. 22 Chapter 3. FICON architecture and addressing . 25 3.1 Fibre Channel architecture . 26 3.2 Introduction to FC-FS and FC-SB-2 . 27 3.2.1 F_Port Login (FLOGI) . 29 3.2.2 N_Port Login (PLOGI). 31 3.2.3 Point-to-Point FC-FS and FC-SB-2 communication initialization . 32 3.2.4 Switched point-to-point FC-FS and FC-SB-2 communication initialization . 34 3.2.5 Cascaded Director FC-FS and FC-SB-2 communication initialization . 36 3.2.6 Fabric support Extended Link Services. 38 3.2.7 Fabric address support (switched point-to-point) . 39 3.2.8 Fabric address support (FICON support for cascaded Directors). 40 3.3 z/Architecture FICON channel I/O request flow . 42 3.3.1 zSeries Channel Subsystem Port address generation . 43 3.4 FICON FC-SB-2 communication. 46 3.4.1 FICON frame format . 47 3.4.2 Native FICON frame process . 50 3.4.3 Buffer-to-buffer credit . 54 Chapter 4. Processor support . 55 4.1 zSeries and 9672 G5/G6 processor support . 56 4.1.1 ESCON and FICON channel connectivity support . 58 4.1.2 FICON channel support for zSeries processors . 62 4.1.3 zSeries-supported ESCON and FICON I/O types. 63 4.1.4 FICON Express on the zSeries processors . 63 © Copyright IBM Corp. 2002. All rights reserved. iii 4.1.5 FICON-supporting products . 65 4.1.6 Support for cascaded FICON Directors . 66 Chapter 5. FICON - Fibre Channel cabling . 69 5.1 Basic implementation options . 70 5.2 Basic FICON cabling terminology . 70 5.3 Key items for fiber cable planning . 72 5.3.1 FOSA types and fiber modes . 72 5.3.2 Link loss budget . 73 5.3.3 Distance considerations . 73 5.4 Fiber extender and fiber repeater . 77 5.5 Reusing of existing cables and trunks. 79 5.6 Mixed cabling implementation example . 81 Chapter 6. z/OS and OS/390 software support. 83 6.1 z/OS and OS/390 FICON APARs . 84 6.2 HCD . 85 6.2.1 HCM . 86 6.3 IOCP . 87 6.3.1 zSeries processors . 87 6.3.2 9672 G5/G6 processor . 87 6.4 System Automation I/O-Ops . 88 6.4.1 FICON Director management software. 88 6.5 RMF . 88 6.6 DFSMS . 89 6.7 z/VM and VM/ESA . 89 6.8 VSE/ESA. 90 6.9 TPF . 90 Chapter 7. FICON channel configurations . 91 7.1 Differences between FICON channels and ESCON channels . 92 7.2 FICON channel configuration support. 92 7.2.1 Design steps . 93 7.3 FICON point-to-point configuration design . ..