H3C Technologies H3C S3100 Series Switches - Manual (Page 241)

Operation Manual – Multicast
H3C S3100-52P Ethernet Switch Chapter 2 IGMP Snooping Configuration
2-4
Mes
sage
Sen
der
Recei
ver
Purpo
se
Switch action
IGM
P
grou
p-sp
ecific
quer
y
mess
age
Mult
icast
rout
er
and
mult
icast
swit
ch
Multic
ast
memb
er
switch
and
host
Query
if a
specific
IGMP
multica
st
group
contain
s any
membe
r
Send an IGMP group-specific query message to
the IP multicast group being queried.
If yes, add the IP multicast
group address to the MAC
multicast group table.
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.
IGM
P
host
repor
t
mess
age
Host Multic
ast
router
and
multic
ast
switch
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.