OmniSwitch OS6860/OS6900/OS10K Troubleshooting Guide Part No.032996-00 Rev.A
AOS Release 7.X and 8.X January 2015
Alcatel-Lucent Page 102 of 148
Example (with IPMVLAN):
The querier is not able to differentiate IGMP Membership Reports based on IP source address
basis when spoofing feature is enabled.
This feature should be used along with IPMVLAN feature to ensure that IGMP Membership
Reports are forwarded with a source IP address belonging to an IP network range in the VLAN
configured on the querier switch, which is corresponding to the IPMVLAN.
The querier switch in AOS implementation accepts IGMP Membership Reports even if their
source IP address is not matching IP address network in this VLAN.
Zapping
If zapping feature is enabled multicast groups are immediately removed from registered subscribers table after
receiving IGMP Leave (IGMP version 2) message or IGMP Membership Report type 4 (IGMP version 3).
Querier-forwarding
Querier-forwarding feature should be enabled if a streaming device is connected to a switch, which is not a
querier. If this feature is enabled on a switch, then all multicast streams are forwarded to the querier.
Static-querier
Static-querier feature should be enabled if a streaming device is connected to a switch, which is not a querier.
If this feature is enabled on a querier, then all IGMP Membership queries are forwarded towards the streaming
device.
Neighbor
The "neighbor" concept was introduced for IGMPv3 in RFC 3376. This concept is also used for IGMPv2. The
extract from the RFC 3376:
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