home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!decwrl!hal.com!olivea!spool.mu.edu!news.nd.edu!mentor.cc.purdue.edu!noose.ecn.purdue.edu!sparkyfs.erg.sri.com!csl.sri.com!wclark
- From: wclark@cisco.com (Wayne Clark)
- Newsgroups: comp.protocols.ibm
- Subject: Re: ACTLU, LU62
- Keywords: IBM,SNA,LU62
- Message-ID: <1dbf5dINNel@roche.csl.sri.com>
- Date: 5 Nov 92 15:38:21 GMT
- References: <1992Oct29.211725.13086@webo.dg.com>
- Organization: cisco Systems, Menlo Park, California, USA
- Lines: 50
- NNTP-Posting-Host: regal.cisco.com
-
- 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.
-
- (NB: The code to verify that the LU Type in the BIND matches the LU type
- in the local configuration since the SSCP-LU session never gets created.)
-
- Ref: Format and Protocol Reference Manual: Architecture Logic for LU Type 6.2,
- procedure PROCESS_ACTLU_RQ on p. 4-79.
-
- >
- >2. In an LU6.2 session, if the *primary* application issues an FMH-5 ALLOCATE
- > with the CONFIRM option set, must it send a CONFIRM *an LUSTAT* to the
- > *secondary* to mark the end of a transaction?
-
- No, the confirm indicator is piggybacked on the RU data by setting the
- RH appropriately. CONFIRM by the Transaction Program results in the
- setting of the DR2 bit in the RH.
-
- If you want to reference the LU 6.2 architecture, setting the CONFIRM
- indicator in the SEND_PARM of the SEND_DATA_RECORD for messages from PS
- to HS results in setting the response bits to RQD3. This is described
- very vaguely in the LU 6.2 FAPL in Section 6.1 (DFC) and is executed in
- SEND_BIU described on p. 6.1-37.
-
- >
- > Thanks in advance.
- >
- >
- >+----------------------------------------------+
- >| Chuck Noyes DGC |
- >| Chuck@maui.webo.dg.com |
- >+----------------------------------------------+
-
- -----------
- Wayne Clark
- cisco Systems, Inc.
- wclark@cisco.com
- 415/688-4627
-