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IGMP Snooping

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

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IGMP Snooping

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

  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 0 1 2 3 31 Multicast Group ID Class D 1 1 1 0 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 Class D Address 224 . 10 . 8 . 5 E 0 0 A 0 8 0 5 1 1 1 0 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 1 Not used Low-ordered 23-bits mapped Ethernet Multicast Address 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 0 1 0 0 5 E 0 A 0 8 0 5

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

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

  6. Multicast Group Registration Multicast Group Ports 01005E010101 18 Internet Ver=1 Type=6 t=0x64 Checksum IGMP V2 Membership Report Class D group address=225.1.1.1 Multicast Group Ports 01005E010101 4, Multicast Group Ports 01005E010101 6 Membership Report 225.1.1.1 Membership Report 225.1.1.1 24 Multicast Router IP-TV Server * * 10 * * *

  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 Group Ports 01005E010101 18 Internet Multicast Group Ports 01005E010101 4, Multicast Group Ports 01005E010101 6 24 Multicast Router IP-TV Server * * 10 * * *

  9. IGMP V1- Leaving a Group Multicast Group Ports 01005E010101 18 Internet General Queries Dest 224.0.0.1 TTL=1 General Queries Dest 224.0.0.1 TTL=1 Multicast Group Ports 01005E010101 4, Multicast Group Ports 01005E010101 6 Membership Report 225.1.1.1 Membership Report 225.1.1.1 24 Multicast Router IP-TV Server * * 10 * * *

  10. IGMP V1- Leaving a Group Multicast Group Ports 01005E010101 18 Internet Multicast Group Ports 01005E010101 4, Multicast Group Ports • 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)] Multicast Router IP-TV Server * * 10 * * *

  11. IGMP V1- Leaving a Group Multicast Group Ports 01005E010101 18 Internet Multicast Group Ports 01005E010101 4, Multicast Group Ports Multicast Router IP-TV Server * 10 * *

  12. IGMP V2- Leaving a Group Multicast Group Ports 01005E010101 18 Internet Ver=1 Type=7 t=0x64 Checksum IGMP V2 Leave Message Class D group address=225.1.1.1 Multicast Group Ports 01005E010101 4, Multicast Group Ports 01005E010101 6 Leave Message 24 Multicast Router IP-TV Server * * 10 * * *

  13. IGMP V2- Leaving a Group Multicast Group Ports 01005E010101 18 Internet Ver=1 Type=1 t=0x64 Checksum IGMP V2 Group Specific Query Class D group address=225.1.1.1 Group Specific Queries 225.0.0.1 Multicast Group Ports 01005E010101 4, Multicast Group Ports 01005E010101 6 Membership Report 225.1.1.1 24 Multicast Router IP-TV Server * * 10 * * *

  14. IGMP V2- Leaving a Group Multicast Group Ports 01005E010101 18 Internet Multicast Group Ports 01005E010101 4, Multicast Group Ports Multicast Router IP-TV Server * 10 * *

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

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

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

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