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4.7.3
Unknown
Multicast
After
enabled
IGMP
Snooping,
the
known
multicast
can
be
filtered
by
IGMP
Snooping
mechanism
and
forwarded
to
the
member
ports
of
the
known
multicast
groups.
The
other
multicast
streams
which
are
not
leant
is
so
‐
called
unknown
multicast,
the
switch
decide
how
to
forward
them
based
on
the
setting
of
this
page.
Send
to
Query
Ports:
The
unknown
multicast
will
be
sent
to
the
Query
ports.
The
Query
port
means
the
port
received
the
IGMP
Query
packets.
It
is
usually
the
uplink
port
of
the
switch.
Send
to
All
Ports:
The
unknown
multicast
will
be
flooded
to
all
ports
even
they
are
not
the
member
ports
of
the
groups.
Discard:
The
unknown
multicast
will
be
discarded.
Non
‐
member
ports
will
not
receive
the
unknown
multicast
streams.
4.7.4
CLI
Commands
of
the
Multicast
Filtering
Command
Lines
of
the
multicast
filtering
configuration
Feature
Command Line
IGMP Snooping
IGMP Snooping - Global Switch(config)# ip igmp snooping
IGMP snooping is enabled globally. Please specify
on which vlans IGMP snooping enables
IGMP Snooping - VLAN
Switch(config)# ip igmp snooping vlan
VLANLIST allowed vlan list
all all existed vlan
Switch(config)# ip igmp snooping vlan 1-2
IGMP snooping is enabled on VLAN 1-2.
Disable IGMP Snooping -
Global
Switch(config)# no ip igmp snoopin
IGMP snooping is disabled globally ok.
Disable IGMP Snooping - Switch(config)# no ip igmp snooping vlan 3
