IBM 8676 Hardware Maintenance Manual - Page 72

Cabling, interconnect, network

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4. Test the keyboard by typing a few words within an application. 5. Repeat steps 1 through 4 for each server in the chain. If any of the devices do not work with any of the servers, verify that all the cables are correctly and fully connected; then, test the chain again. If the problem remains, turn off all the servers and disconnect all the C2T interconnect cables; leave the C2T breakout cable connected. Turn on server 1 and retry the devices. If the devices work, one of the C2T interconnect cables is probably defective. Connect server 2 to the chain and test the devices again. Continue adding servers to the chain and testing them, one at a time, until you identify the defective cable. Using the C2T chain To select the server for which you want the monitor, keyboard, and pointing device to work, press the select button on the server, or you can select the server by using the keyboard: 1. Press Num Lock on the keyboard twice. The monitor screen goes blank. 2. Type the number of the server in the chain and press Enter. The monitor now displays the image for the selected server, and the select LED on the selected server is lit. After you have used the keyboard to specify a server number, you can use the same method (pressing Num Lock twice, then pressing + or -) to select other servers in sequence. Note: You cannot use the + and - keys to select a server if you made the previous selection by pressing the select button on the selected server; you must have made the previous selection through the keyboard. If you turn off the selected server, the monitor screen goes blank, and you must select another server. No more than two adjacent servers in the chain can be disconnected from their power source for the chain to work properly. Cabling an ASM interconnect network An Advanced System Management (ASM) bus is integrated into the C2T interconnect cables, so by adding one or more Remote Supervisor Adapters to a C2T chain of servers, you can create an Advanced System Management (ASM) interconnect network. For information about using a Remote Supervisor Adapter for remote server management, see the documentation that comes with the adapter. Before cabling the ASM interconnect network, review the following information: v The cables in an ASM interconnect network are hot-swappable. v Make sure that the firmware for the Remote Supervisor Adapter, ASM processor, and integrated system management processor (ISMP) are at the latest level. v The servers in an ASM interconnect network are referred to by their assigned addresses, not by their positions in the rack. An ASM interconnect network can have up to 24 RS-485 connections, depending on the configuration. The connections can include Remote Supervisor Adapters, ASM processors, ASM PCI adapters, and ISMPs. Use the following information to determine the number of servers and connections that you can have on your ASM interconnect network: v Each Remote Supervisor Adapter, ASM processor, ASM PCI adapter, and ISMP in a server that is connected to the network uses one connection. For example, if 62 xSeries 335 Type 8676, Type 8830: Hardware Maintenance Manual and Troubleshooting Guide

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4.
Test
the
keyboard
by
typing
a
few
words
within
an
application.
5.
Repeat
steps
1
through
4
for
each
server
in
the
chain.
If
any
of
the
devices
do
not
work
with
any
of
the
servers,
verify
that
all
the
cables
are
correctly
and
fully
connected;
then,
test
the
chain
again.
If
the
problem
remains,
turn
off
all
the
servers
and
disconnect
all
the
C2T
interconnect
cables;
leave
the
C2T
breakout
cable
connected.
Turn
on
server
1
and
retry
the
devices.
If
the
devices
work,
one
of
the
C2T
interconnect
cables
is
probably
defective.
Connect
server
2
to
the
chain
and
test
the
devices
again.
Continue
adding
servers
to
the
chain
and
testing
them,
one
at
a
time,
until
you
identify
the
defective
cable.
Using
the
C2T
chain
To
select
the
server
for
which
you
want
the
monitor,
keyboard,
and
pointing
device
to
work,
press
the
select
button
on
the
server,
or
you
can
select
the
server
by
using
the
keyboard:
1.
Press
Num
Lock
on
the
keyboard
twice.
The
monitor
screen
goes
blank.
2.
Type
the
number
of
the
server
in
the
chain
and
press
Enter.
The
monitor
now
displays
the
image
for
the
selected
server,
and
the
select
LED
on
the
selected
server
is
lit.
After
you
have
used
the
keyboard
to
specify
a
server
number,
you
can
use
the
same
method
(pressing
Num
Lock
twice,
then
pressing
+
or
-)
to
select
other
servers
in
sequence.
Note:
You
cannot
use
the
+
and
-
keys
to
select
a
server
if
you
made
the
previous
selection
by
pressing
the
select
button
on
the
selected
server;
you
must
have
made
the
previous
selection
through
the
keyboard.
If
you
turn
off
the
selected
server,
the
monitor
screen
goes
blank,
and
you
must
select
another
server.
No
more
than
two
adjacent
servers
in
the
chain
can
be
disconnected
from
their
power
source
for
the
chain
to
work
properly.
Cabling
an
ASM
interconnect
network
An
Advanced
System
Management
(ASM)
bus
is
integrated
into
the
C2T
interconnect
cables,
so
by
adding
one
or
more
Remote
Supervisor
Adapters
to
a
C2T
chain
of
servers,
you
can
create
an
Advanced
System
Management
(ASM)
interconnect
network.
For
information
about
using
a
Remote
Supervisor
Adapter
for
remote
server
management,
see
the
documentation
that
comes
with
the
adapter.
Before
cabling
the
ASM
interconnect
network,
review
the
following
information:
v
The
cables
in
an
ASM
interconnect
network
are
hot-swappable.
v
Make
sure
that
the
firmware
for
the
Remote
Supervisor
Adapter,
ASM
processor,
and
integrated
system
management
processor
(ISMP)
are
at
the
latest
level.
v
The
servers
in
an
ASM
interconnect
network
are
referred
to
by
their
assigned
addresses,
not
by
their
positions
in
the
rack.
An
ASM
interconnect
network
can
have
up
to
24
RS-485
connections,
depending
on
the
configuration.
The
connections
can
include
Remote
Supervisor
Adapters,
ASM
processors,
ASM
PCI
adapters,
and
ISMPs.
Use
the
following
information
to
determine
the
number
of
servers
and
connections
that
you
can
have
on
your
ASM
interconnect
network:
v
Each
Remote
Supervisor
Adapter,
ASM
processor,
ASM
PCI
adapter,
and
ISMP
in
a
server
that
is
connected
to
the
network
uses
one
connection.
For
example,
if
62
xSeries
335
Type
8676,
Type
8830:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide