Speaker 2006/XX/XX Speaker 2007/XX/XX IGMP Snooping CK NG Technical Marketing

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

Multicast Addressing Multicast Group ID Class D bits : All hosts group : All routers group >Multicast Group E Class D Address 224. A E0A0805 Ethernet Multicast Address Not used Low-ordered 23-bits mapped

Multicast Router Port Multicast Router Interval Internet IP-TV Server General Queries Dest TTL=1 Checksum Class D group address= IGMP V Ver=1Type=1Unused IGMP V2 Checksum Class D group address= Ver=1Type=1t=0x64 Multicast Router Port Multicast Router Port Multicast Router Port

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

Multicast Group Registration Multicast Router Internet IP-TV Server * Membership Report Multicast GroupPorts 01005E Membership Report ** Multicast GroupPorts 01005E , * * Multicast GroupPorts 01005E IGMP V2 Membership Report Checksum Class D group address= Ver=1Type=6t=0x64

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

Multicast Filtering Multicast Router Internet IP-TV Server * Multicast GroupPorts 01005E ** Multicast GroupPorts 01005E , * * Multicast GroupPorts 01005E

IGMP V1- Leaving a Group Multicast Router Internet IP-TV Server * Multicast GroupPorts 01005E ** Multicast GroupPorts 01005E , * * Multicast GroupPorts 01005E General Queries Dest TTL=1 General Queries Dest TTL=1 Membership Report Membership Report

IGMP V1- Leaving a Group Multicast Router Internet IP-TV Server * Multicast GroupPorts ** 01005E , * * Multicast GroupPorts 01005E 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)]

IGMP V1- Leaving a Group Multicast Router Internet IP-TV Server Multicast GroupPorts ** 01005E , * Multicast GroupPorts 01005E

IGMP V2- Leaving a Group Multicast Router IP-TV Server * Multicast GroupPorts 01005E ** Multicast GroupPorts 01005E , * * Multicast GroupPorts 01005E Internet Leave Message IGMP V2 Leave Message Checksum Class D group address= Ver=1Type=7t=0x64

IGMP V2- Leaving a Group Multicast Router IP-TV Server * Multicast GroupPorts 01005E ** Multicast GroupPorts 01005E , * * Multicast GroupPorts 01005E Internet Group Specific Queries Membership Report IGMP V2 Group Specific Query Checksum Class D group address= Ver=1Type=1t=0x64

IGMP V2- Leaving a Group Internet Multicast Router IP-TV Server Multicast GroupPorts ** 01005E , * Multicast GroupPorts 01005E

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

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

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