Operation Manual – IGMP Snooping
Quidway S3100 Series Ethernet Switches
Chapter 1 IGMP Snooping Configuration
Huawei Technologies Proprietary
1-4
Mes
sage
Sen
der
Recei
ver
Purpo
se
Switch action
If yes, reset the aging timer
of the port.
If yes,
add the
IP
ulticast
port to the
m
group.
If yes,
check if
the port
exists in
the MAC
ulticast
group.
m
If not, add the
port to the
MAC multicast
group, reset
the aging
timer of the
port and check
if the
corresponding
IP multicast
group exists.
If not,
create an
IP
multicast
group and
add the
port to it.
IGMP
host re
port me
ssage
Ho
st
Multica
s
t rout
er
Apply
for
joining
a
multica
st
group,
or
respon
d to an
IGMP
query
messa
ge
Check
if the
IP
multica
st
group
has a
corres
pondin
g MAC
multica
st
group
If not:
Create a MAC multicast group and
notify the multicast router that a
member is ready to join the multicast
group.
Add the port to the MAC multicast
group and start the aging timer of the
port.
Add all ports in the VLAN owning this
port to the forward port list of the MAC
multicast group.
Add the port to the IP multicast group.
If no response is
received from the port
before the timer times
t, remove the port
m the
corresponding MAC
multicast group.
ou
fro
IGMP
leave
messa
ge
Ho
st
Multica
s
t rout
er
Notify
the
multica
st
router
that the
host is
leaving
its
multica
st
group.
Send group-specific
query message to the
multicast group of the
port receiving the leave
message to check if the
multicast group has any
member, and start the
corresponding query
response timer.
If no response is
received from the
multicast group before
the timer times out,
notify the router to
remove this multicast
group node from the
multicast tree.