Diagnostics
and
troubleshooting
The
router
is
designed
for
high
availability
and
low
failure.
It
does
not
require
any
regular
physical
maintenance.
Diagnostic
tests
In
addition
to
POST,
Fabric
OS
includes
diagnostic
tests
to
help
you
troubleshoot
the
hardware
and
firmware.
This
includes
tests
of
internal
connections
and
circuitry,
fixed
media,
and
the
transceivers
and
cables
in
use.
The
tests
are
implemented
by
command,
either
through
a
Telnet
session
or
through
a
terminal
set
up
for
a
serial
connection
to
the
router.
Some
tests
require
the
ports
to
be
connected
by
external
cables,
to
allow
diagnostics
to
verify
the
serializer/deserializer
interface,
transceiver,
and
cable.
Some
tests
require
loop
back
plugs.
Diagnostic
tests
are
run
at
link
speeds
of
1-Gb/sec,
2-Gb/sec,
and
4-Gb/sec.
For
information
about
specific
diagnostic
tests,
see
the
Fabric
OS
Administrator's
Guide
.
Note:
Diagnostic
tests
might
temporarily
lock
the
transmit
and
receive
speed
of
the
links
during
diagnostic
testing.
CLI
commands
for
device
status
This
section
lists
a
few
CLI
commands
that
you
can
use
to
obtain
device
status
and
perform
diagnostics,
as
well
as
event
and
port
log
information
for
troubleshooting
purposes.
Refer
to
the
Fabric
OS
Administrator’s
Guide
and
the
Fabric
OS
Command
Reference
for
details
on
these
and
other
commands.
You
can
log
in
to
the
router
as
administrator
and
use
different
commands
to
display
the
overall
status
of
the
router,
as
well
as
the
status
of
individual
components.
Use
the
following
commands
to
display
the
status
and
configuration
of
various
components:
v
switchStatusShow
-
displays
the
overall
status
of
the
router
v
portShow
-
displays
the
configuration
and
status
of
an
individual
port
v
tempShow
-
displays
temperature
of
the
router
v
fanShow
-
displays
the
status
of
individual
fans
v
psShow
-
displays
the
status
of
the
specified
power
supply
v
errShow
-
displays
the
router
event
log
v
portLogShow
-
displays
the
events
specific
to
each
port
CRU
status
The
power
supplies
and
fan
assemblies
are
customer
replaceable
units
(CRUs),
which
can
be
replaced
without
the
use
of
special
tools.
To
determine
the
status
of
these
CRUs,
use
the
following
diagnostic
procedures.
Follow
the
procedures
in
Chapter
4,
“Removing
and
replacing
CRUs,”
on
page
39
if
you
determine
that
any
CRUs
are
defective.
Power
supplies
The
two
power
supplies,
power
supply
#1
(
4
in
Figure
10
on
page
40)
and
power
supply
#2
(
3
),
are
hot-swappable.
They
are
identical
and
fit
into
either
power
supply
slot.
Use
any
of
the
following
methods
to
determine
whether
a
power
supply
needs
to
be
replaced:
v
Check
the
power
supply
status
LED
(see
“Power
status
LED
patterns”
on
page
32).
Chapter
3.
Managing
the
router
and
monitoring
components
37
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