Subject: Correction to my previous note

From: "Marcia Peters (8-444-4380)" <[email-masked]>
Date: Fri, 8 Oct 93 15:50:01 EDT

Sorry, there was a boo-boo in my previous note.
Here's the correction.  Look for the | at the left margin.
Marcia

Let's say we have the following HPR configuration (maybe not very
realistic, but illustrative):

                            :
APPN       APPN       APPN  :  HPR         HPR         HPR
 EN         NN        NN    :   NN         NN           EN
+---+     +---+      +---+  :  +---+       +---+       +---+
| A |-----| B |------| C |-----| D |-------| E |-------| F |
+---+     +---+      +---+  :  +---+       +---+       +---+
                            :

| Adaptive session level pacing is performed between A(LU)-B(ISR),
| B(ISR)-C(ISR), C(ISR)-D(ISR), and D(ISR)-F(LU).  Adaptive BIND
| pacing is performed between ASM components in the same node pairs:
| A-B, B-C, C-D, and D-F.  (Node D performs APPN functions when
| connecting to C, and HPR functions when connecting to E and F.)

An RTP connection is established between D and F. ARB is performed only
between D and F. E is not involved with (1) adaptive session pacing (2)
adaptive BIND pacing, or (3) ARB.  During stead-state data flow, E just
(1) checks checksums and discards any errored incoming packets (2)
routes packets and (3) honors the priority indicated in the
network-layer header.

HPR eliminates all hop-by-hop elements of procedure.

Marcia Peters ................................ IBM Networking Systems