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User’s Manual of IGSW-24040T
message, and query messages that are specific to a given group.
The states a computer will go through to join or to leave a multicast group are shown below:
Figure 4-8-4
IGMP State Transitions
IGMP Querier –
A router, or multicast-enabled switch, can periodically ask their hosts if they want to receive multicast traffic. If there is more
than one router/switch on the LAN performing IP multicasting, one of these devices is elected “
querier
” and assumes the
role of querying the LAN for group members. It propagates the service requests on to any doing upstream multicast
switch/router to ensure that it will continue to receive the multicast service.
Multicast routers use this information, along with a multicast routing protocol such as
DVMRP or PIM, to support IP multicasting across the Internet.
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Summary of Contents for IGSW-24040T
Page 130: ...User s Manual of IGSW 24040T Figure 4 6 10 Port 1 Port 6 VLAN Configuration 130 ...
Page 150: ...User s Manual of IGSW 24040T 150 Figure 4 7 10 MST1 MSTI Port Configuration Page Screenshot ...
Page 188: ...User s Manual of IGSW 24040T Figure 4 9 14 Voice VLAN Configuration Page Screenshot 188 ...
Page 308: ...User s Manual of IGSW 24040T 308 ...
Page 434: ...User s Manual of IGSW 24040T Parameters vid VLAN ID 1 4095 Default Setting disable 434 ...