48
Lenovo ThinkSystem NE2552E Flex Switch: Installation Guide
Upgrading the Switch Firmware
You
can
upgrade
the
switch
firmware
by
using
an
FTP,
TFTP
or
SFTP
file
server.
Typically,
the
file
server
runs
as
an
application
under
your
operating
system.
Make
sure
that
the
file
server
application
is
installed
on
your
file
server;
then,
download
the
switch
firmware
images
from
the
Lenovo
website
into
a
directory
on
your
file
server.
Then
enable
the
file
server
and
set
its
default
directory
to
the
directory
where
the
switch
firmware
image
resides.
Note:
Updating
the
firmware
involves
rebooting
the
switch.
If
you
have
made
any
configuration
changes
you
wish
to
persist
beyond
the
upgrade
process,
you
must
type
the
copy
running-config
startup-config
command.
This
command
stores
the
current
switch
configuration
and
all
changes
to
nonvolatile
memory.
To
transfer
the
switch
firmware
image
files
from
the
FTP,
TFTP
or
SFTP
file
server
to
the
switch,
you
can
establish
a
Secure
Shell
(SSH)
v2
or
Telnet
session
through
the
CMM.
Ping
the
file
server
to
make
sure
that
you
have
a
connection.
The
session
performs
optimally
if
all
three
network
entities
(file
server,
CMM,
and
switch
IP
addresses)
are
on
the
same
subnet.
Otherwise,
you
must
use
a
router
and
configure
a
gateway
address
on
the
switch.
Use
the
management
‐
module
interface
to
configure
the
IP
addresses
of
the
CMM
external
interface
(eth0)
and
the
switch
so
that
they
are
both
on
the
same
subnet
as
the
file
server.
Examples
of
IP
addresses
and
masks
are
described
in
the
following
table.
Note:
With
this
configuration,
you
can
ping
the
switch
from
the
file
server.
Network entity
IP address
Mask
FTP,
TFTP
or
SFTP
file
server
192.168.2.178
255.255.255.0
CMM
(eth0)
192.168.2.237
255.255.255.0
Switch
‐
module
current
IP configuration
(IF
128)
192.168.2.51
255.255.255.0
