Huawei Quidway S3100 Series Operation Manual page 329

Operation Manual – IGMP Snooping
Quidway S3100 Series Ethernet Switches
Muliticast Muliticast router Muliticast Muliticast router Muliticast Muliticast router Muliticast Muliticast router
Layer 2 Ethernet sw itch Layer 2 Ethernet sw itch Layer 2 Ethernet sw itch Layer 2 Ethernet sw itch
Video stream Video stream Video stream Video stream
Multicast Multicast Multicast Multicast Multicast Multicast Multicast Multicast
group member group member group member group member group member group member group member group member
Figure 1-1 Multicast packet transmission with or without IGMP Snooping
1.1.2 IGMP Snooping Fundamentals
I. IGMP Snooping terminologies
Before going on, we first describe the following terms involved in IGMP Snooping:
Router port: the switch port directly connected to the multicast router.
Multicast member port: a switch port connected to a multicast group member (a
host in a multicast group).
MAC multicast group: a multicast group identified by a MAC multicast address and
maintained by the switch.
The following three timers are closely associated with IGMP snooping.
Table 1-2 IGMP Snooping timers
Timer
Router
aging timer
Multicast
member
aging timer
Query response
timer
Multicast packet transmission Multicast packet transmission Multicast packet transmission Multicast packet transmission Multicast packet transmission Multicast packet transmission Multicast packet transmission Multicast packet transmission
without IGMP Snooping without IGMP Snooping without IGMP Snooping without IGMP Snooping without IGMP Snooping without IGMP Snooping without IGMP Snooping without IGMP Snooping
Video stream Video stream Video stream Video stream
Video stream Video stream Video stream Video stream
Internet Internet Internet Internet Internet Internet Internet Internet
Video stream Video stream Video stream Video stream Video stream Video stream Video stream Video stream
Video stream Video stream Video stream Video stream
Video stream Video stream Video stream Video stream
Non- Non- Non-multicast Non- Non- Non-multicast Non- Non- Non- Non-multicast Non- Non- Non- Non-multicast Non- Non-
group member group member group member group member group member group member group member group member group member group member group member group member group member group member group member group member
Setting
port Aging time of
the router port
Aging time of
port the multicast
member ports
Query response
timeout time
Huawei Technologies Proprietary
Chapter 1 IGMP Snooping Configuration
Multicast packet trans Multicast packet trans Multicast packet trans Multicast packet trans
with IGMP Sn with IGMP Sn with IGMP Sn with IGMP Sn
Muliticast Muliticast Muliticast router Muliticast Muliticast router Muliticast router Muliticast Muliticast router
VOD server VOD server VOD server VOD server
Layer 2 Ethernet sw itch Layer 2 Ethernet sw itch Layer 2 Ethernet sw itch Layer 2 Ethernet sw itch
Video stream Video stream Video stream Video stream
Multicast Multicast Multicast Multicast Multicast Multicast Multicast Multicast
Non-multicast Non- Non- Non- Non-multicast Non- Non- Non-
group member group member group member group member group member group member group member group member
group member group member group member group member group member group member group member group member
Message
normally received
before timeout
IGMP general
query message
IGMP
message/PIM
message/DVMRP
Probe message
IGMP report
message
1-2
mission mission mission mission
ooping ooping ooping ooping
Video s Video s Video s Video s tream tream tream tream Video stream Video stream Video stream Video stream
Internet Internet Internet Internet Internet Internet Internet Internet
Video st Video st Video st Video st Video st Video st Video st Video st ream ream ream ream ream ream ream ream
VOD server VOD server VOD server VOD server
Non Non Non Non Non Non Non Non - - -multicast - - - -multicast -
gr gr gr gr gr gr gr gr oup member oup member oup member oup member oup member oup member oup member oup member
Timeout action on
the switch
Consider that this port
is not a router port any
more.
Send an IGMP
group-specific query
message to the
multicast member
port.
Remove the port from
the member port list of
the multicast group.