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An
ASM
interconnect
network
can
have
up
to
24
RS-485
connections,
depending
on
the
configuration.
The
connections
can
include
Remote
Supervisor
Adapter
II-EXAs,
Remote
Supervisor
Adapter
IIs,
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
II-EXA,
Remote
Supervisor
Adapter
II,
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
a
server
that
is
connected
to
the
network
has
a
Remote
Supervisor
Adapter
and
an
integrated
ASM
processor,
the
server
uses
two
connections
on
the
network.
v
The
network
must
include
at
least
one
server
with
a
Remote
Supervisor
II-EXA,
Remote
Supervisor
Adapter
II,
or
Remote
Supervisor
Adapter
(either
installed
as
an
option
or
preinstalled
in
the
server).
v
On
an
ASM
interconnect
network,
one
ASM
processor
or
one
ASM
PCI
adapter
can
communicate
with
11
RS-485
connections.
These
connections
must
be
to
ASM
processors,
ASM
PCI
adapters,
Remote
Supervisor
Adapters,
Remote
Supervisor
Adapter
II-EXAs,
or
Remote
Supervisor
Adapter
IIs.
The
ASM
processor
and
ASM
PCI
adapter
cannot
communicate
with
ISMPs.
v
If
your
existing
ASM
interconnect
network
has
12
RS-485
connections
that
include
only
ASM
processors,
ASM
PCI
adapters,
and
at
least
one
Remote
Supervisor
Adapter
or
Remote
Supervisor
Adapter
II,
you
can
also
add
up
to
12
ISMP-based
servers
to
this
same
network.
The
Remote
Supervisor
Adapter
on
this
network
will
communicate
with
all
23
RS-485
connections;
however,
an
ASM
processor
or
ASM
PCI
adapter
on
this
network
will
communicate
with
only
the
11
non-ISMP
RS-485
connections.
The
ASM
processor
and
ASM
PCI
adapter
will
not
recognize
the
ISMPs,
but
the
ISMPs
can
reside
on
the
same
ASM
interconnect
network.
v
Make
sure
that
the
ASM
interconnect
network
is
set
up
as
a
bus,
not
as
a
ring.
You
must
connect
the
servers
to
the
ASM
interconnect
network
in
a
series,
with
terminated
beginning
and
end
points.
Be
sure
to
use
the
RS-485
terminator
plugs.
For
more
information,
see
“Using
the
RS-485
terminator
plugs
on
interconnected
servers.”
v
Make
sure
that
the
total
combined
length
of
all
Ethernet
cables
connecting
the
servers
in
the
ASM
interconnect
network
does
not
exceed
91
m
(300
ft).
Using
the
RS-485
terminator
plugs
on
interconnected
servers:
The
Remote
Supervisor
Adapter
II-EXA
comes
with
two
RS-485
terminator
plugs.
To
ensure
successful
RS-485
communication
on
your
ASM
interconnect
network,
you
must
install
the
terminator
plugs
in
the
open
connectors
at
each
end
of
the
RS-485
bus.
The
illustrations
in
“ASM
interconnect
network
configuration
examples”
on
page
68
can
help
you
determine
where
to
put
the
RS-485
terminator
plugs
on
your
ASM
interconnect
network.
Forwarding
alerts:
Remote
Supervisor
Adapters,
ASM
PCI
adapters,
ASM
processors,
and
ISMPs
that
are
connected
to
an
ASM
interconnect
network
share
resources
and
system-management
information.
This
section
provides
information
about
how
alerts
are
forwarded
in
the
ASM
interconnect
network.
During
normal
operation,
each
Remote
Supervisor
Adapter,
ASM
processor,
ASM
PCI
adapter,
and
ISMP
on
the
ASM
interconnect
network
communicates
with
the
other
processors
and
adapters
on
the
network.
Processors
or
adapters
that
have
a
modem
or
Ethernet
connection
notify
the
other
processors
and
adapters
that
these
communications
resources
are
available
for
use
by
other
servers
on
the
ASM
interconnect
network.
These
resources
are
then
used
as
ASM
interconnect
network
48
xSeries
445
Type
8870:
User’s
Guide