49
Rate
limiting
is
a
form
of
flow
control
used
to
enforce
a
strict
bandwidth
limit
at
a
port.
You
can
program
separate
transmit
(Egress
Rule)
and
receive
(Ingress
Rule)
rate
limits
at
each
port,
and
even
apply
the
limit
to
certain
packet
types
as
described
below.
Packet
type
:
You
can
select
the
packet
type
that
you
want
to
filter.
The
packet
types
of
the
Ingress
Rule
listed
here
include
Broadcast
Only
/
Broadcast
and
multicast
/
Broadcast,
Multicast
and
Unknown
Unicast
or
All
.
The
packet
types
of
the
Egress
Rule
(outgoing)
only
support
all
packet
types.
Rate
:
This
column
allows
you
to
manually
assign
the
limit
rate
of
the
port.
Valid
values
are
from
1Mbps
‐
100Mbps
for
fast
Ethernet
ports
and
gigabit
Ethernet
ports.
The
step
of
the
rate
is
1
Mbps.
Default
value
of
Ingress
Rule
is
“8”
Mbps;
default
value
of
Egress
Rule
is
0
Mbps.
0
stands
for
disabling
the
rate
control
for
the
port.
Click
on
Apply
to
apply
the
configuration.
4.3.4
Port
Trunking
Port
Trunking
configuration
allows
you
to
group
multiple
Ethernet
ports
in
parallel
to
increase
link
bandwidth.
The
aggregated
ports
can
be
viewed
as
one
physical
port
so
that
the
bandwidth
is
higher
than
merely
one
single
Ethernet
port.
The
member
ports
of
the
same
trunk
group
can
balance
the
loading
and
backup
for
each
other.
Port
Trunking
feature
is
usually
used
when
you
need
higher
