I/O
modules
The
BladeCenter
T
unit
supports
from
up
to
four
hot-swap
I/O
modules.
Table
10
on
page
33
identifies
the
types
of
I/O
modules
that
you
can
install
in
each
I/O-module
bay.
Go
to
the
IBM
Support
Web
site
at
www.ibm.com/pc/support/
to
see
the
list
of
supported
I/O
modules.
The
BladeCenter
T
unit
supports
a
minimum
of
one
hot-swap
Ethernet
switch
module
or
pass-through
module,
in
I/O-module
bay
1
or
2.
This
I/O
module
provides
an
internal
connection
to
an
integrated
Ethernet
controller
in
all
the
blade
servers
in
the
BladeCenter
T
unit,
up
to
8
internal
connections
per
I/O
module.
To
provide
an
internal
connection
for
the
second
integrated
Ethernet
controller
in
each
blade
server,
install
an
Ethernet
switch
module
or
pass-through
module
in
the
available
I/O-module
bay
of
the
pair
(I/O-module
bay
1
or
bay
2).
The
management
modules
connect
to
the
switch
module
through
the
backplane
using
a
transformerless
100-Mbps
connection
and
an
I2C
interface.
The
BladeCenter
T
unit
supports
two
additional
I/O
modules
in
I/O-module
bays
3
and
4.
Each
of
these
I/O
modules
provides
an
internal
connection
to
one
of
the
two
network-interface
controllers
on
each
of
the
I/O
expansion
options
that
are
installed
on
blade
servers
in
the
BladeCenter
T
unit.
The
I/O
module
must
be
compatible
with
the
network
interface
on
each
of
the
I/O
expansion
options.
For
example,
if
you
install
a
Fibre
Channel
I/O
expansion
option
on
a
blade
server,
the
I/O
modules
that
you
install
in
I/O-module
bays
3
and
4
must
be
Fibre
Channel
switch
modules
or
pass-through
modules.
Important:
The
switch
modules
in
I/O
module
bays
3
and
4,
and
all
blade
server
interface
options
in
the
BladeCenter
T
unit,
must
use
the
same
interface
type.
For
example,
if
you
install
an
Ethernet
interface
option
on
a
blade
server,
the
switch
modules
that
you
install
in
I/O
module
bays
3
and
4
must
be
Ethernet.
All
other
interface
options
in
the
BladeCenter
T
unit
must
also
be
Ethernet
interface
options.
Note:
You
can
use
a
pass-through
module
in
any
I/O-module
bay,
provided
the
associated
controller
in
the
blade
servers
or
I/O
expansion
option
is
compatible
with
it.
32
BladeCenter
T
Types
8720
and
8730:
Planning
and
Installation
Guide
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