IGMP V3
The report shows the following information.
TABLE 20 Output of show ip igmp proxy stats
Field | Description |
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Intf | Interface |
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genQv1 RX | IGMP v1 general query received on proxy interface. |
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genQv2 RX | IGMP v2 general query received on proxy interface. |
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genQv3 RX | IGMP v3 general query received on proxy interface. |
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GrpQ RX | Group query received. |
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SrcQ RX | Source query received. |
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Rprtv1 TX | IGMP v1 report generated. |
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Rprtv2 TX | IGMP 2 report generated. |
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Rprtv3 TX | IGMP v3 report generated. |
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leave TX | IGMP v2 leave generated. |
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IGMP V3
The Internet Group Management Protocol (IGMP) allows an IPV4 system to communicate IP Multicast group membership information to its neighboring routers. The routers in turn limit the multicast of IP packets with multicast destination addresses to only those interfaces on the router that are identified as IP Multicast group members.
In IGMP V2, when a router sent a query to the interfaces, the clients on the interfaces respond with a membership report of multicast groups to the router. The router can then send traffic to these groups, regardless of the traffic source. When an interface no longer needs to receive traffic from a group, it sends a leave message to the router which in turn sends a
In contrast, IGMP V3 provides selective filtering of traffic based on traffic source. A router running IGMP V3 sends queries to every multicast enabled interface at the specified interval. These general queries determine if any interface wants to receive traffic from the router. The following are the three variants of the Query message:
•A "General Query" is sent by a multicast router to learn the complete multicast reception state of the neighboring interfaces. In a General Query, both the Group Address field and the Number of Sources (N) field are zero.
•A
FastIron Ethernet Switch IP Multicast Configuration Guide | 147 |
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