204
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
, 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 204 Multicast forwarding before and after IGMP snooping is enabled
Basic IGMP snooping concepts
This section lists the basic IGMP snooping concepts.
IGMP snooping related ports
As shown in
, IGMP snooping runs on Switch A and Switch B, Host A and Host C are
receivers in a multicast group.
Содержание FlexNetwork NJ5000
Страница 12: ...x Index 440 ...
Страница 39: ...27 Figure 16 Configuration complete ...
Страница 67: ...55 Figure 47 Displaying the speed settings of ports ...
Страница 78: ...66 Figure 59 Loopback test result ...
Страница 158: ...146 Figure 156 Creating a static MAC address entry ...
Страница 183: ...171 Figure 171 Configuring MSTP globally on Switch D ...
Страница 243: ...231 Figure 237 IPv6 active route table ...
Страница 293: ...281 Figure 298 Ping operation summary ...