АМАТЕК AN-SGM28P24-400 [192/322] Thirteenth chapters

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Thirteenth chapters

SNOOPING configuration

In the metropolitan area network /Internet, using unicast sends the same packet to the

network in many but not all recipients, because of the need to copy each packet to the receiving

endpoint, with the increasing number of receivers, the number of packets will need a linear

increase, which makes the host, exchange the overall burden of routing equipment and the

network bandwidth increase, efficiency is greatly affected. With the increasing demand for

multipoint video conferencing, video on demand and group communication applications, multicast

has become the most popular mode of communication in order to improve resource utilization。

switch implements the function of IGMP SNOOPING for multicast application service.

IGMP SNOOPING monitors IGMP packets on the network to realize dynamic learning of IP

multicast MAC addresses。

This chapter describes the concept and configuration of IGMP SNOOPING, including the

following contents：

 GMP SNOOPING introduce

 IGMP SNOOPING configuration

 The IGMP SNOOPING configuration example

13.1 IGMP SNOOPING introduce

Traditional network in a subnet multicast packets as broadcast processing, so easy to make

network traffic, causing network congestion. When the switch is implemented on IGMP

SNOOPING, IGMP SNOOPING can learn IP dynamic multicast MAC address, to maintain the

output port list IP multicast MAC address, the multicast data flow only to the output port to send,

it can reduce the network traffic.

The main contents of this section are as follows：

 IGMP SNOOPING processing