Browse Prior Art Database

Automatic Circular Remote Initial Program Load through Multiple Token Ring Adapter Cards

IP.com Disclosure Number: IPCOM000111840D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Cheng, Y: AUTHOR

Abstract

Disclosed is a Remote Initial Program Load (RIPL) process which the IBM LANStreamer* (a RIPL card) allows a host station to perform RIPL through multiple RIPL cards in case of failures (maximum number of RIPL cards depending upon the available slots in the box). The process is activated when the host fails to boot the system.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 57% of the total text.

Automatic Circular Remote Initial Program Load through Multiple Token
Ring Adapter Cards

      Disclosed is a Remote Initial Program Load (RIPL) process which
the IBM LANStreamer* (a RIPL card) allows a host station to perform
RIPL through multiple RIPL cards in case of failures (maximum number
of RIPL cards depending upon the available slots in the box).  The
process is activated when the host fails to boot the system.

      After the Power-On Self-Test (POST), the active RIPL card goes
out to search for the next RIPL card in the same box.  The search is
performed in a fixed circular direction so that the next RIPL card in
that direction will be found and switched when the RIPL fails on the
current active RIPL card.  When the next RIPL card gains control, it
will search its next RIPL card again.  This process is called the
circular RIPL card search process and an example is shown in Fig. 1.
In the example, slot x has the current active RIPL card.  Once it
gets control, it will find the RIPL card in slot 3 as its next RIPL
card which will then find slot 1 and slot 1 will find slot n as its
next RIPL card.  Thus, in case of RIPL failures, the RIPL would
travel in the indicated circular direction until an active RIPL card
is located.

      Fig. 2 shows the design flow of the algorithm that does the
automatic circular RIPL.  When the RIPL code on a RIPL card gets
control, the circular RIPL card search process is activated.  The
search starts from slot 1 a...