🚀 go-pugleaf

In article <1dbf5dINNel@roche.csl.sri.com> wclark@cisco.com (Wayne Clark) writes:
>In article <1992Oct29.211725.13086@webo.dg.com> chuck@maui.webo.dg.com (Chuck Noyes) writes:
>>Greetings:
>>
>>I have 2 questions that I need answered by someone who's SNA proficient.
>>
>>1.  What should happen in the case where an ACTLU request is received by a 
>>    secondary device for an LU that is already active and has an LU_T2
>>    session established?  Should a sense code be returned to the primary?  If
>>    so, which one? 
>
>If there is already an active SSCP-LU session that matches the LFSID of
>the ACTLU request, then the secondary LU is obliged to send a
>-RSP(0815) to the primary LU.  -RSP(0815) is the Function Already Active
>sense code.
>
>Ref: Format and Protocol Reference Manual: Architecture Logic for LU Type 6.2,
>procedure PROCESS_ACTLU_RQ on p. 4-79.
>
 
    The original question was an LU Type 2, or 3270.  Both the 3274
    and 3174 manuals note otherwise for an LU_Type 2.

    If the SLU receives an ACTLU, and ERP is not specified, the SLU
    terminates any EXISTING sessions between that LU and a host
    program.  The SLU returns a +RSP to the ACTLU and the SSCP-LU
    Session is re-established.   

    See GA23-0218 IBM 3174 Subsystem Control Unit Functional
    Description, section on SNA Protocol.   Or the older GA23-0061
    IBM 3270 IDS 3274 Control Unit Description and Programmer's
    Guide.