1. Speaker 2006/XX/XX Speaker 2007/XX/XX www.Edge-Core.com IGMP Snooping WWW.Edge-Core.com CK NG Technical Marketing

2. IGMP Snooping Layer 2 switches can use IGMP snooping to prevent the flooding of multicast traffic by dynamically configuring switch port so that multicast traffic is forwarded to only those ports associated with IP multicast receiver By implementing the IGMP snooping feature, it makes Layer 2 switch increase the performance of network for reducing multicast traffics flooding

3. Multicast Addressing Multicast Group ID Class D 0 1 2 3 110 31 1 28 bits 224.0.0.1: All hosts group 224.0.0.2: All routers group 224.0.1.0-238.255.255.255-->Multicast Group E 110 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 11 00 Class D Address 224. A0805 10.8.5 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 1 1 1 1 0 0 0 0 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 1 01005E0A0805 Ethernet Multicast Address Not used Low-ordered 23-bits mapped

4. Multicast Router Port Multicast Router Interval 60-120 Internet IP-TV Server General Queries Dest 224.0.0.1 TTL=1 Checksum Class D group address=0.0.0.0 IGMP V1 4 7 15 31 Ver=1Type=1Unused IGMP V2 Checksum Class D group address=0.0.0.0 Ver=1Type=1t=0x64 Multicast Router Port Multicast Router Port Multicast Router Port

5. Configuration of IGMP Snooping Mrouter port : The port which received IGMP General Querier Dynamically learned by Switch system IGMP Snooping Enable by Default Disable IGMP Snooping

6. Multicast Group Registration Multicast Router Internet IP-TV Server * Membership Report 225.1.1.1 Multicast GroupPorts 01005E0101016 Membership Report 225.1.1.1 ** Multicast GroupPorts 01005E0101014, * * Multicast GroupPorts 01005E01010118 24 10 IGMP V2 Membership Report Checksum Class D group address=225.1.1.1 Ver=1Type=6t=0x64

7. Multicast Address Table Multicast Group learned to port 6 in VLAN 1 by IGMP Snooping Multicast Group dynamically learned to mrouter port in order to prevent flooding of Multicast traffic before any member learned by IGMP Snooping

8. Multicast Filtering Multicast Router Internet IP-TV Server * Multicast GroupPorts 01005E0101016 ** Multicast GroupPorts 01005E0101014, * * Multicast GroupPorts 01005E01010118 24 10

9. IGMP V1- Leaving a Group Multicast Router Internet IP-TV Server * Multicast GroupPorts 01005E0101016 ** Multicast GroupPorts 01005E0101014, * * Multicast GroupPorts 01005E01010118 24 10 General Queries Dest 224.0.0.1 TTL=1 General Queries Dest 224.0.0.1 TTL=1 Membership Report 225.1.1.1 Membership Report 225.1.1.1

10. IGMP V1- Leaving a Group Multicast Router Internet IP-TV Server * Multicast GroupPorts ** 01005E0101014, * * Multicast GroupPorts 01005E01010118 10 IGMP V1 Silently Leaving a group, no respond to query then time out (Query Count: 2) x[( Query Interval:125s) +(query-max-response-time:10s)]

11. IGMP V1- Leaving a Group Multicast Router Internet IP-TV Server Multicast GroupPorts ** 01005E0101014, * Multicast GroupPorts 01005E01010118 10

12. IGMP V2- Leaving a Group Multicast Router IP-TV Server * Multicast GroupPorts 01005E0101016 ** Multicast GroupPorts 01005E0101014, * * Multicast GroupPorts 01005E01010118 24 10 Internet Leave Message IGMP V2 Leave Message Checksum Class D group address=225.1.1.1 Ver=1Type=7t=0x64

13. IGMP V2- Leaving a Group Multicast Router IP-TV Server * Multicast GroupPorts 01005E0101016 ** Multicast GroupPorts 01005E0101014, * * Multicast GroupPorts 01005E01010118 24 10 Internet Group Specific Queries 225.0.0.1 Membership Report 225.1.1.1 IGMP V2 Group Specific Query Checksum Class D group address=225.1.1.1 Ver=1Type=1t=0x64

14. IGMP V2- Leaving a Group Internet Multicast Router IP-TV Server Multicast GroupPorts ** 01005E0101014, * Multicast GroupPorts 01005E01010118 10

15. Configuration of Immediate Leave Enter VLAN Interface to enable the Immediate-leave

16. Act As Querier Non Multicast Router Internet IP-TV Server General Queries Dest 224.0.0.1 TTL=1 Multicast Router Port Multicast Router Port

17. Configuration of Act as Querier Enable Querier function Sending General Query every 125 sec Querier Enabled