whichever multicast routing protocol is being used by the router in order to

Whichever multicast routing protocol is being used by

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whichever multicast routing protocol is being used by the router, in order to ensure that multicast packets are delivered to all networks where there are interested receivers. In AOS each multicast router becomes a "dynamic neighbor" by default. AOS switches replicate all multicast packets and all IGMP messages to all neighbors due to compliance with RFC 3376 . IPMVLAN scenarios in Ethernet-Services mode Not supported in AOS 7 and AOS 8 Example of IGMP version 2 messages IGMP Membership Report Note: All IGMP messages need to have TTL field set to 1. Messages with other values are dropped. In IGMP version 2 a group address which is registered by IGMP Membership Report corresponds to a destination IP address of a packet. MAC: ------ MAC Header ------ MAC: MAC: Destination Address : 01 00 5E 01 01 01 MAC: Source Address : 00 00 00 08 73 F0 MAC: Type : 0x0800 (Ethernet II) MAC: IP: ------ IP Header ----------- IP: IP: Version = 04 (0x04) IP: Header Length = 20 (0x14) IP: Differentiated Services Field = 0 (0x00) IP: Type of Service = 00 (0x00) IP: Total Length = 28 (0x001C) IP: Identification = 0 (0x0000) IP: Fragment Offset = 0 IP: Time to Live = 1 (0x01) IP: Protocol = IGMP IP: Checksum = 0x… IP: Source Address = 10.0.0.111 IP: Destination Address = 239.1.1.1 IP: IGMP: ------ IGMP Header ----------- IGMP: IGMP: Version = 2 (0x2) IGMP: Type = Membership Report v2 (0x16) IGMP: Max Response Time = 100 (0x64) IGMP: Checksum = 0xF796 IGMP: Group = 239.1.1.1 IGMP: IGMP Leave Note: In IGMP version 2 a leave message is always sent with 224.0.0.2 IP destination address. MAC: ------ MAC Header ------ MAC: MAC: Destination Address : 01 00 5E 00 00 02 MAC: Source Address : 00 00 00 08 73 F0 MAC: Type : 0x0800 (Ethernet II) MAC: IP: ------ IP Header ----------- IP: IP: Version = 04 (0x04) IP: Header Length = 20 (0x14) IP: Differentiated Services Field = 0 (0x00) IP: Type of Service = 00 (0x00) IP: Total Length = 28 (0x001C) IP: Identification = 0 (0x0000) IP: Fragment Offset = 0
OmniSwitch OS6860/OS6900/OS10K Troubleshooting Guide Part No.032996-00 Rev.A AOS Release 7.X and 8.X January 2015 Alcatel-Lucent Page 104 of 148 IP: Time to Live = 1 (0x01) IP: Protocol = IGMP IP: Checksum = 0x… IP: Source Address = 10.0.0.111 IP: Destination Address = 224.0.0.2 IP: IGMP: ------ IGMP Header ----------- IGMP: IGMP: Version = 2 (0x2) IGMP: Type = Leave Group (0x17) IGMP: Max Response Time = 100 (0x64) IGMP: Checksum = 0xF68C IGMP: Group = 239.1.1.1 IGMP Membership Query Note: In IGMP version 2 a Membership Query message is always sent with 224.0.0.1 IP destination address. An IGMP Membership Query message is used to verify if there are still active subscribers registered for a specific group. IGMP Membership Query with 0.0.0.0 multicast group is called a General Query message. It used for announcing querier’s availability. MAC: ------ MAC Header ------ MAC: MAC: Destination Address : 01 00 5E 00 00 01 MAC: Source Address : 00 00 00 00 0C 00 MAC: IP: ------ IP Header ----------- IP: IP: Version = 04 (0x04) IP: Header Length = 20 (0x14) IP: Differentiated Services Field = 0 (0x00) IP: Type of Service = 00 (0x00) IP: Total Length = 28 (0x001C) IP: Identification = 0 (0x0000) IP: Fragment Offset = 0 IP: Time to Live = 1 (0x01) IP: Protocol = IGMP IP: Checksum = 0x… IP: Source Address = 10.0.0.1 IP: Destination Address = 224.0.0.1 IP: IGMP: ------ IGMP Header ----------- IGMP: IGMP: Version = 2 (0x2) IGMP: Type = Membership Query (0x11) IGMP: Max Response Time = 50 (0x32) IGMP: Checksum = 0xEECD IGMP: Group = 0.0.0.0 IGMP: Example of IGMP version 3 messages

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