User’s Manual of MGSD-10080F
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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 then propagates the service requests on to any 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.
Summary of Contents for MGSD-10080F
Page 1: ...User s Manual of MGSD 10080F 1 ...
Page 43: ...User s Manual of MGSD 10080F 43 Figure 2 8 Wires DO0 and DO1 to Open Detector ...
Page 276: ...User s Manual of MGSD 10080F 276 Figure 4 11 15 Windows 2003 AD Server Setting Path ...
Page 358: ...User s Manual of MGSD 10080F 358 ...
Page 488: ...User s Manual of MGSD 10080F 488 Example Disable SMAC mode MGSD 10080F Aggr mode smac disable ...
Page 554: ...User s Manual of MGSD 10080F 554 Activate the alternate firmware image Syntax Firmware Swap ...
Page 603: ...User s Manual of MGSD 10080F 603 SMTP Test ...
Page 616: ...User s Manual of MGSD 10080F 616 Syntax Show STP ...