POEGEM24T4SFP
User
Manual
182
3.17.
IGMP
IGMP
Snooping
is
used
to
establish
multicast
groups
to
forward
multicast
packets
to
each
of
the
multicast
member
ports,
and,
in
nature,
avoids
wasting
bandwidth
with
IP
multicast
packets.
If
a
switch
does
not
support
IGMP
or
IGMP
Snooping
it
can’t
tell
a
multicast
packet
from
a
broadcast
packet,
so
it
will
treat
them
all
as
broadcast
packets.
Without
IGMP
Snooping,
multicast
packets
are
treated
as
broadcast
packets,
therefore
increasing
the
overall
traffic
on
your
network.
The
POEGEM24T4SFP
supports
all
functions
of
IGMP
Snooping
including
query,
report
and
leave.
IGMP
Snooping
is
used
by
the
switch
to
learn
who
belongs
to
a
multicast
group
and
also
update
the
multicast
table
within
the
switch
with
new
multicast
members.
Once
the
switch
has
learned
who
belongs
to
the
multicast
group
all
packets
forwarded
to
a
multicast
address
will
be
forwarded
to
all
members
belonging
to
the
multicast
group.
3.17.1.
IGMP
Mode
Fig.
3.170
Function
Name:
Mode
Function
Description:
Used
to
enable
or
disable
the
IGMP
function
on
the
switch.
Parameter
Description:
IGMP
Node:
Used
to
enable
or
disable
IGMP
function.
Summary of Contents for POEGEM24T4SFP
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