16
MULTICAST CONFIGURATION GUIDE
Configuring IGMP | Internet Group Management Protocol Snooping (IGMP Snooping) is a multicast |
Snooping | constraint mechanism that runs on Layer 2 Ethernet switches to manage and |
| control multicast groups. |
By listening to and analyzing IGMP messages, a Layer 2 device running IGMP Snooping establishes and maintains mappings between ports and multicast groups and forwards multicast data based on these mappings.
Network Diagram Figure 36 Network diagram for IGMP Snooping
|
|
| Receiver |
| |
|
|
|
| Host A |
|
Source |
|
|
| Eth1/0/4 | Receiver |
| Eth1/0/2 | Eth1/0/1 |
| ||
|
| Eth1/0/3 |
| ||
| 1.1.1.2/24 | 10.1.1.1/24 | Eth1/0/1 |
| |
1.1.1.1/24 | Router A |
| Switch A | Eth1/0/2 | Host B |
| IGMP querier |
|
|
| |
| Multicast packets |
| Host C |
| |
|
|
|
|
| |
Networking and
Configuration
Requirements
To prevent multicast packets from being flooded at Layer 2, IGMP Snooping is required on the switch.
■As shown in Figure 36, Router A connects to a multicast source (Source) through Ethernet 1/0/2, and to Switch A through Ethernet 1/0/1.
■Run PIM DM and IGMP on Router A. Enable IGMP Snooping on Switch A. Router A is the IGMP querier.
■The source sends multicast data to multicast group 224.1.1.1. Host A and Host B join multicast group 224.1.1.1.
Application Product
Matrix | Product series | Software version | Hardware version |
|
|
|
|
| Switch 5500 | Release V03.02.04 | All versions |
| Switch 5500G | Release V03.02.04 | All versions |
