Subject: Approval requested on items 8407 & 8418

From: "Ed Tremblay (254-5515)" <[email-masked]>
Date: Mon, 14 Oct 96 10:29:46 EDT

Two proposals to change the APPN DLUR Architecture Reference manual have
been placed on networking.raleigh.ibm.com.  These files can be found
in directory /pub/standards/aiw/dlur:

     abs8407.txt
     arch8407d.psbin
     abs8418.txt
     arch8418d.psbin

I plan on requesting approval of these items at AIW12.

Ed Tremblay

(Item 008407) Correct DLUR REQDISCONT processing
------------------------------------------------
When a DLUR currently receives a REQDISCONT request from a downstream
PU (DSPU), it converts the request into a REQDACTPU request and sends
it to the DLUS.  It does not return a RSP(REQDISCONT) to the DSPU.
It appears that in the same situation in a subarea environment, a
RSP(REQDISCONT) is returned to the DSPU (for subarea the response is
built by the subarea SSCP and is forwarded to the DSPU by the NCP BF).

Problems have been reported by customers involving DSPUs hanging
because a RSP(REQDISCONT) was not sent by the DLUR.  The DLUR
architecture must be updated to direct the DLUR to build and send a
RSP(REQDISCONT) to the DSPU upon receipt of the RSP(REQDACTPU) from the
DLUS.

(Item 008418) Include Route Selection (X'2B') CV on +RSP(BIND) RU
-----------------------------------------------------------------
The current DLUR architecture description for reextending a +RSP(BIND)
includes reinserting the FQPCID control vector and turning on the CVs
included indicator.

The format for a +RSP(BIND) also includes a Route Selection (CV X'2B')
control vector if one was received on the corresponding BIND request RU.

Therefore, the DLUR architecture for reextending a +RSP(BIND) should be
updated to add reinserting into the +RSP(BIND) a CV X'2B' if one was
received on the BIND request.