Subject: ATM temporary XID control block

From: "Marcia Peters (8-444-4380)" <[email-masked]>
Date: Wed, 14 Aug 96 14:13:28 EDT

Another solution has been proposed which certainly looks cleaner.  I
wanted to run it by the AIW members to see if anyone knows any reason why
it wouldn't work.

The proposal is to make the caller to send the first XID(pn).  The callee
(the one with the temporary LSCB) can force this by sending a null XID
when it receives a null XID from the caller.  When the caller receives a
null XID, it then sends the first XID(pn).  The callee would not send an
XID(pn) until it received one from the caller.

CALLER:                                    CALLEE:
 +---+       XID(null)                      +---+
 | A |------------------------------------->| B |
 +---+                                      +---+
             XID (null)
   <------------------------------------------o Temporary LSCB

             XID(pn) with CV4680 and CV0EF4
   o----------------------------------------->o Temporary becomes defined
                                              |
             XID(pn, with proper EBN parms)   |
   <------------------------------------------+ The first XID(pn)is sent
                                                using the defined link
                                                station.

This appears to be candidate for adding to the HPR/ATM document.
Any comments?
Marcia