High Availability Software for the Intel® NetStructureTM ZT 4901 Technical Product Specification 3
Contents
Contents1 Document Organization................................................ ................................................................ 9
2 Introduction.............................................................................................. ....................................11
2.1 Terminology...... .............................................................................................................. ....11
2.2 High Availability Hardware Approach ................... .............................................................. 14
2.2.1 Processor Boards ........................................................................... .......................15
2.2.2 Bridge Mezzanine .................................................................................................. 16
2.2.3 Backplane......... ........................................................................................... ..........17
2.3 High-Availability Software Approach..................... .............................................................. 18
2.3.1 Host Application.......................... ........................................................................... 18
2.3.2 System Management.................. ........................................................................... 19
2.3.3 Backplane Device Drivers........................................... ...........................................20
3 Host Application Software......................................................... .................................................21
3.1 Goals of the Host Application ..................................... ........................................................ 21
3.1.1 Serviceability.................................................. ........................................................2 1
3.1.2 Portability ........................................................................................................... ....21
3.1.3 Redundancy.......................................................... .................................................21
3.2 Division of Labor ............................................................................................................. ....22
3.3 Development Issues .................................................................................... ...... ....... ...... ... .23
3.3.1 Redundancy.......................................................... .................................................23
3.3.2 Graceful Switchover.............................................. .................................................24
3.3.3 Hardened Applications.......................................... .................................................2 4
3.3.4 Code Modularity.................................................... .................................................24
4 System Management........................................................... ........................................................25
4.1 Redundant Host API .......................................................................................................... .25
4.1.1 IPMI API...................................................................... ...........................................25
4.1.2 Hot Swap API .................................................................... ...... ....... .......................26
4.1.2.1 Slot Control API .................................................................... .................26
4.2 Baseboard Management Controller Firmware Enhancements ........................................... 26
4.2.1 Fault Configuration ............................................... .................................................26
4.2.2 Isolation Strategies .................................................................. ..............................27
4.2.3 IPMI RH Channel Commands............................................................................ ....28
4.2.3.1 RH Channel Enabled ............................................................................. 28
4.2.3.2 RH Channel Get RH BMC Address ....................................................... 28
5 High Availability CompactPCI Device Drivers ................................................................ ..........31
5.1 Device Driver Design ...................................................................................................... ....31
5.1.1 Device Driver States ...... ....... ...... ....... ...... ...... ....... ...... ...........................................32
5.1.1.1 Initialization ............................................................................................ 32
5.1.1.2 Quiesced........................................ ........................................................3 2
5.1.1.3 Activation ............................................................................................... 32
5.1.2 Adding High-Availability Functionality .................................................................... 33
5.1.2.1 Add Device......................................................................................... ....34
5.1.2.2 Resume Operations........... .................................................................... 34
5.1.2.3 Suspend Operations .............................................................................. 35