H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – Multicast
H3C S7500 Series Ethernet Switches Chapter 3
IGMP Snooping Configuration
3-4
Messag
e
Sen
der
Receiv
er
Purpos
e
Action of the multicast member switch
IGMP
group-sp
ecific
query
message
Multi
cast
route
r and
multi
cast
switc
h
Multicas
t
member
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
port to
the IP
multicas
t group.
If yes,
check if
the port
exists
in the
MAC
multica
st
group
If not, add
the port to
the MAC
multicast
group, reset
the aging
timer of the
port and
check if the
correspondi
ng IP
multicast
group
exists.
If not,
create
an IP
multicas
t group
and add
the port
to it.
IGMP
host
report
message
Host Multicas
t router
and
multicas
t switch
Apply
for
joining
a
multica
st
group,
or
respon
d to an
IGMP
query
messag
e
Chec
k if
the IP
multic
ast
group
has a
corre
spon
ding
MAC
multic
ast
group
If not:
z Create a MAC multicast group
and notify the multicast router
that a member is ready to join
the multicast group.
z Add the port to the MAC
multicast group and start the
aging timer of the port.
z Add all router ports in the
VLAN owning this port to the
MAC multicast group.
z Add the port to the new IP
multicast group.