H3C Technologies H3C S3100 Series Switches - Manual (Page 242)

Operation Manual – Multicast
H3C S3100-52P Ethernet Switch Chapter 2 IGMP Snooping Configuration
2-5
Mes
sage
Sen
der
Recei
ver
Purpo
se
Switch action
If no response is
received from
the port before
the timer times
out, the switch
will check
whether the port
corresponds to a
single MAC
multicast group.
z
If yes,
remove the
correspondin
g MAC
multicast
group and IP
multicast
roup g
z
If no, remove
only those
entries that
correspond
to this port in
the MAC
multicast
group, and
remove the
correspondin
g IP multicast
group entries
IGM
P
leave
mess
age
Host
Multic
ast
router
and
multic
ast
switch
Notify
the
multica
st
router
and
multica
st
switch
that the
host is
leaving
its
multica
st
group.
Multicast router and multicast
switch send IGMP
group-specific query
packet(s) to the multicast
group whose member host
sends leave packets to check
if the multicast group has any
members and enable the
corresponding query 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