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Configuring IGMP snooping
Overview
IGMP snooping runs on a Layer 2 switch as a multicast constraining mechanism to improve multicast
forwarding efficiency. It creates Layer 2 multicast forwarding entries from IGMP packets that are
exchanged between the hosts and the router.
As shown in
Figure 240
, when IGMP snooping is not enabled, the Layer 2 switch floods multicast packets
to all hosts. When IGMP snooping is enabled, the Layer 2 switch forwards multicast packets of known
multicast groups to only the receivers of the multicast groups.
Figure 240
Multicast forwarding before and after IGMP snooping is enabled
Basic IGMP snooping concepts
This section describes the basic IGMP snooping concepts.
IGMP snooping related ports
As shown in
Figure 241
, IGMP snooping runs on Switch A and Switch B, Host A and Host C are receivers
in a multicast group.
Содержание Compaq Presario,Presario 1910
Страница 35: ...22 Figure 16 Sort display based on MAC address in the ascending order ...
Страница 54: ...41 Figure 27 Configuration finishes ...
Страница 70: ...57 Figure 42 Configuring idle timeout period 3 Set the idle timeout period for logged in users 4 Click Apply ...
Страница 98: ...85 Figure 67 Displaying the rate settings of ports ...
Страница 114: ...101 Figure 82 Port traffic statistics NOTE When the bandwidth utilization is lower than 1 1 is displayed ...
Страница 158: ...145 Field Description OutErrors Number of invalid packets sent through the interface ...
Страница 202: ...189 Figure 177 Creating a static MAC address entry ...
Страница 230: ...217 Figure 193 Configuring MSTP globally on Switch D ...
Страница 359: ...346 5 View the operation result in the Summary area Figure 316 IPv6 traceroute operation result ...