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4.11.3
Port
Mirroring
Port
mirroring
(also
called
port
spanning)
is
a
tool
that
allows
you
to
mirror
the
traffic
from
one
or
more
ports
onto
another
port,
without
disrupting
the
flow
of
traffic
on
the
original
port.
Any
traffic
that
goes
into
or
out
of
the
Source
Port(s)
will
be
duplicated
at
the
Destination
Port.
This
traffic
can
then
be
analyzed
at
the
Destination
port
using
a
monitoring
device
or
application.
A
network
administrator
will
typically
utilize
this
tool
for
diagnostics,
debugging,
or
fending
off
attacks.
Port
Mirror
Mode:
Select
Enable/Disable
to
enable/disable
Port
Mirror.
Source
Port:
This
is
also
known
as
Monitor
Port.
These
are
the
ports
you
want
to
monitor.
The
traffic
of
all
source/monitor
ports
will
be
copied
to
destination/analysis
ports.
You
can
choose
a
single
port,
or
any
combination
of
ports,
but
you
can
only
monitor
them
in
Rx
or
TX
only.
Click
on
checkbox
of
the
Port
ID,
RX,
Tx
or
Both
to
select
the
source
ports.
Destination
Port:
This
is
also
known
as
Analysis
Port.
You
can
analyze
the
traffic
of
all
the
monitored
ports
at
this
port
without
affecting
the
flow
of
traffic
on
the
port(s)
being
monitored.
Only
one
RX/TX
of
the
destination
port
can
be
selected.
A
network
administrator
would
typically
connect
a
LAN
analyzer
or
Netxray
device
to
this
port.
Once
you
finish
configuring
the
settings,
click
on
Apply
to
apply
the
settings.
