Note:
Changes
are
made
periodically
to
the
IBM
Web
site.
The
actual
procedure
might
vary
slightly
from
what
is
described
in
this
document.
1.
Go
to
http://www.ibm.com/support.
2.
Under
Search
technical
support
,
type
7981
or
1884,
and
click
Search
.
3.
In
the
Additional
search
terms
field,
type
ethernet,
and
click
Go
.
The
Ethernet
controllers
support
failover,
which
provides
automatic
redundancy
for
the
Ethernet
controllers.
Without
failover,
you
can
have
only
one
Ethernet
controller
from
each
server
attached
to
each
virtual
LAN
or
subnet.
With
failover,
you
can
configure
more
than
one
Ethernet
controller
from
each
server
to
attach
to
the
same
virtual
LAN
or
subnet.
Either
one
of
the
integrated
Ethernet
controllers
can
be
configured
as
the
primary
Ethernet
controller.
If
you
have
configured
the
controllers
for
failover
and
the
primary
link
fails,
the
secondary
controller
takes
over.
When
the
primary
link
is
restored,
the
Ethernet
traffic
switches
back
to
the
primary
Ethernet
controller.
(See
your
operating
system
device
driver
documentation
for
information
about
configuring
for
failover.)
Important:
To
support
failover
on
the
blade
server
Ethernet
controllers,
the
Ethernet
switch
modules
in
the
BladeCenter
unit
must
have
identical
configurations.
Blade
server
Ethernet
controller
enumeration
The
enumeration
of
the
Ethernet
controllers
in
a
blade
server
is
operating-system
dependent.
Through
the
operating-system
settings,
you
can
verify
the
Ethernet
controller
designations
that
a
blade
server
uses.
The
routing
of
an
Ethernet
controller
to
a
particular
I/O-module
bay
depends
on
the
type
of
blade
server.
You
can
verify
which
Ethernet
controller
is
routed
to
which
I/O-module
bay
by
using
the
following
test:
1.
Install
only
one
Ethernet
switch
module
or
pass-thru
module
in
I/O-module
bay
1.
2.
Make
sure
that
the
ports
on
the
switch
module
or
pass-thru
module
are
enabled
(
I/O
Module
Tasks
→
Management
→
Advanced
Management
in
the
management-module
Web
interface).
3.
Enable
only
one
of
the
Ethernet
controllers
on
the
blade
server.
Note
the
designation
that
the
blade
server
operating
system
has
for
the
controller.
4.
Ping
an
external
computer
on
the
network
that
the
switch
module
is
connected
to.
If
you
can
ping
the
external
computer,
the
Ethernet
controller
that
you
enabled
is
associated
with
the
switch
module
in
I/O-module
bay
1.
The
other
Ethernet
controller
in
the
blade
server
is
associated
with
the
switch
module
in
I/O-module
bay
2.
If
you
have
installed
an
expansion
card
in
a
blade
server,
communication
from
the
expansion
card
is
routed
to
I/O-module
bays
3
and
4,
if
these
bays
are
supported
by
your
BladeCenter
unit.
You
can
verify
which
controller
on
the
card
is
routed
to
which
I/O-module
bay
by
performing
the
same
test
and
using
a
controller
on
the
expansion
card
and
a
compatible
switch
module
or
pass-thru
module
in
I/O-module
bay
3
or
4.
80
BladeCenter
HS20
Type
7981
and
1884:
Problem
Determination
and
Service
Guide
Summary of Contents for eServer BladeCenter HS20Type 8832
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