Siemens S323 User Manual

User Manual                                                                               UMN:CLI 
SURPASS hiD 6615 S223/S323 R1.5 

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Internet Group Management Protocol (IGMP) is used by hosts and routers that support 
multicasting. All the systems on a network can know which hosts belong to which multi-
cast groups. IGMP is not multicast routing protocol but group management protocol. 

Multicast routers can receive thousands of multicast packets from other group. If a router 
does not have the information of host membership, it has to broadcast the packets. This 
is bandwidth waste. To solve this problem, one group list of members is maintained. 
IGMP helps multicast router to create and renew the list. 

The hiD 6615 S223/S323 supports IGMP Version 1, 2 and 3. 

 

This chapter explains how to configure basic IGMP features such as IGMP version, IGMP 
DB and Debugging method. 

 

You can configure the IGMP Protocol version on an interface. To configure the IGMP Pro-
tocol version, use the following command. 

 <1-3> 

Selects an IGMP version. 
1: version 1 
2: version 2 
3: version 3 (default) 

Interface 

Returns to the default setting. (version 3) 

 

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Provides basic Query-Response mechanism that allows the multicast router to deter-

 

mine which multicast groups are active an other processes that enable hosts to join 

 

and leave a multicast group. 

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Extends IGMP features as IGMP leave process, group-specific queries and explicit 

 

maximum query response time. It added support for "low leave latency", that is, a 

 

reduction in the time it takes for a multicast router to learn that there are no longer 

 

any members of a particular group present on an attached network. 

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Version 3 of IGMP adds support for "source filtering", that is, the ability for a system 

 

to report interest in receiving packets ‘only’ from specific source addresses, or from 

 

‘all but’ specific source addresses, sent to a particular multicast address. That infor-

 

mation may be used by multicast routing protocols to avoid delivering multicast pack-

 

ets from specific sources to networks where there are no interested receivers