Huawei Quidway S3900 Series User Manual

Operation Manual – Multicast Protocol
Quidway S3900 Series Ethernet Switches-Release 1510 Chapter 2 IGMP Snooping Configuration
Huawei Technologies Proprietary
2-3
II. Layer 2 multicast with IGMP Snooping
The switch runs IGMP Snooping to listen to IGMP messages and map the host, the port
corresponding to the host, and the corresponding multicast MAC address.
Internet
Internet
IGMP-enabled router
IGMP message
IGMP message
IGMP Snooping-enabled
Ethernet switch
Figure 2-2 IGMP Snooping implementation
To implement Layer 2 multicast, the switch processes four different types of IGMP
messages it received, as shown in
Table 2-3.
Table 2-3 IGMP Snooping messages
Message Sender Receiver Purpose Switch action
If yes, reset the aging
timer of the router port
IGMP
general
query
message
Multica
st
router
and
multica
st
switch
Multicast
member
switch
and host
Query if
the
multicast
groups
contain
any
member
Check if the
message comes
from the original
router port
If not, notify the multicast
router that a member is in
a multicast group and
start the aging timer for
the router port
IGMP
group-sp
ecific
query
message
Multica
st
router
and
multica
st
switch
Multicast
member
switch
and host
Query if a
specific
IGMP
multicast
group
contains
any
member
Send an IGMP group-specific query message to
the IP multicast group being queried.

Huawei Quidway S3900 Series Specifications

General

Brand	Huawei
Model	Quidway S3900 Series
Category	Switch
Language	English