H3c-technologies H3C S3100V2 Series Switches Manual de usuario descargar pdf (Pagina 21)

• Reducing Layer 2 broadcast packets, saving network bandwidth

• Enhancing the security of multicast traffic

• Facilitating the implementation of per-host accounting

Basic concepts in IGMP snooping

IGMP snooping related ports

In Figure 11, Router A connects to the multicast source, IGMP snooping runs on Switch A and Switch B,

and Host A and Host C are receiver hosts—also called “multicast group members.”

Figure 11 IGMP snooping related ports

IGMP snooping involves the following ports:

• Router port—A router port is a port on a Layer 2 switch that leads toward a Layer 3 multicast

device—DR or IGMP querier. In Figure 11, Ether

net 1/0/1 of Switch A and Ethernet 1/0/1 of

Switch B are router ports. Each switch registers all its local router ports in its router port list.

• Member port—A member port is a port on a Layer 2 switch that leads toward multicast group

members. In Figure 11, Ethe

rnet 1/0/2 and Ethernet 1/0/3 of Switch A and Ethernet 1/0/2 of

Switch B are member ports. Each switch registers all the member ports on the local device in its

IGMP snooping forwarding table.

NOTE:

• Whenever mentioned in this document, a router port is a port on the switch that leads the switch to a

Layer 3 multicast device, rather than a port on a router.

• Unless otherwise specified, router/member ports mentioned in this document include static and

dynamic ports.

• An IGMP-snooping-enabled switch deems that all its ports on which IGMP general queries with the

source IP address other than 0.0.0.0 or PIM hello messages are received are dynamic router ports.

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H3c-technologies H3C S3100V2 Series Switches Manual de usuario Pagina 21