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FM Profile 19

  • Artigo

Function management (FM) Profile 19 is supported on primary logical unit-secondary logical unit (PLU-SLU) sessions using LU 6.2. This profile specifies the following session rules:

  • PLU and SLU use immediate request mode.

  • PLU and SLU use immediate response mode.

  • Multiple RU chains are allowed.

  • PLU and SLU requests indicate definite or exception response.

  • No compression is used.

  • Brackets are used.

  • FM headers (types 5, 7, and 12 only) are allowed.

  • Conditional termination for brackets, specified by conditional end bracket (CEB),is used.

  • PLU and SLU may send CEB.

  • Normal-flow send/receive mode is half-duplex flip-flop.

  • Half-duplex flip-flop reset state is SEND for PLU.

  • Symmetric error responsibility.

  • Contention winner/loser is negotiated at BIND time.

  • PLU and SLU support the following data flow control (DFC) commands:

    • SIGNAL

    • LUSTAT

    • BIS

    • RTR

  • The following combinations of RQE, RQD, CEB, and CD are allowed on end-chain Russ

         
    RQE CD CEB
    RQD2 CD CEB
    RQD3 CD CEB
    RQE1 CD CEB
    RQD CD CEB

    The only option for Profile 19 is contention winner/loser.

See Also

Transmission Service and Function Management Profiles