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Chapter
1.
Introduction
This
chapter
introduces
the
IBM
TotalStorage
SAN
Switch
2109
Model
M12
switch
(hereafter
referred
to
as
the
Model
M12
or
the
M12)
and
contains
the
following
information:
v
v
Overview
The
Model
M12
is
a
high-performance
core
switch
for
storage
area
networks
(SANs),
available
in
16–port
increments
from
32
to128
ports.
It
can
operate
as
a
single
switch
in
a
fabric
or
in
a
fabric
that
contains
multiple
switches.
High-availability
features
of
the
M12
include:
v
Two
redundant
hot-swappable
control
processor
(CP)
cards
with
automatic
failover
v
Up
to
eight
hot-swappable
16–port
cards
v
Four
hot-swappable
power
supplies
v
Three
hot-swappable
blower
assemblies
(two
are
required
for
adequate
cooling)
v
Two
redundant
ac
inputs
v
Non-disruptive
upgrades
for
Fabric
OS
v4.1
and
later
v
Worldwide
name
(WWN)
card
that
is
hot-swappable
in
Fabric
OS
v4.1
and
later
The
M12
also
includes
the
optional
Advanced
Security
feature,
which
enables
policy-based
security
mechanisms
integrated
with
certain
versions
of
the
Fabric
OS.
The
optional
Advanced
Security
feature
has
the
following
capabilities:
v
Centralized
security
management
v
Fabric-wide
security
policies
to
control
access
v
Port
and
switch
level
access
control
v
Management
access
controls
(Telnet,
SNMP,
HTTP,
API)
v
Encryption
of
management
data
such
as
passwords
v
Strong
and
non-reputable
authentication
between
switches
The
Fibre
Channel
ports
support
link
speeds
of
1
Gbps
and
2
Gbps
(inbound
and
outbound).
They
also
automatically
negotiate
to
the
highest
common
speed
of
all
the
devices
that
are
connected
to
the
port
and
are:
v
Compatible
with
short
wavelength
(SWL)
and
long
wavelength
(LWL)
small
form
factor
pluggable
(SFP)
transceivers
v
Universal
and
self-configuring
v
Capable
of
individually
becoming
fabric
loop
ports
(FL_ports),
fabric
ports
(F_ports),
or
expansion
ports
(E_ports)
For
the
M12
specifications,
see
Software
features
Fabric
OS
version
4.1
supports
the
M12.
Fabric
OS
includes
all
the
basic
switch
and
fabric
support
software
as
well
as
optionally
licensed
software
that
is
enabled
by
using
license
keys.
Fabric
OS
is
made
up
of
two
major
software
components:
firmware
that
initializes
and
manages
the
switch
hardware,
and
diagnostics.
©
Copyright
IBM
Corp.
2004
1
Summary of Contents for TotalStorage 2109 M12
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