IGMP

IGMP (Internet Group Management Protocol) is a protocol used for managing members of IP multicast groups. The access point listens to IGMP network traffic and forwards the IGMP multicast packets to radios on which the interested hosts are connected. On the wired side of the network, the access point floods all the wired interfaces. This feature reduces unnecessary flooding of multicast traffic in the network.

To view network IGMP statistics:

1. Select the Statistics menu from the Web UI.
2. Expand the System node from the navigation pane (on the left-hand side of the screen). The System node expands to display the RF Domains created within the managed network.
3. Expand the RF Domain node.
4. Select a Wireless Controller.
5. Expand the Network menu from the left-hand side of the UI.
6. Select IGMP.
   The Statistics > Controller > IGMP stats is displayed in the right-hand pane.

   

   

   The Group field describes the following:

   VLAN	Displays the group VLAN where the multicast transmission is conducted.
   Group Address	Displays the Multicast Group ID supporting the statistics displayed. This group ID is the multicast address hosts are listening to.
   Port Members	Displays the ports on which multicast clients have been discovered. For example, ge1, radio1, etc. Ports can vary somewhat amongst supported controller and service platform models.
   Version	Displays each listed group IGMP version compatibility as either version 1, 2 or 3.

   The Multicast Router (MRouter) field describes the following:

   VLAN	Displays the group VLAN where the multicast transmission is conducted.
   Learn Mode	Displays the learning mode used by the router as either Static or PIM-DVMRP.
   Port Members	Displays the physical ports on which multicast clients have been discovered by the multicast router. For example, ge1, radio1, etc. Ports can vary somewhat amongst supported controller and service platform models.
   MiNT IDs	Lists MiNT IDs for each listed VLAN. MiNT provides the means to secure access point profile communications at the transport layer. Using MiNT, an access point can be configured to only communicate with other authorized (MiNT enabled) access points of the same model.
   Query Interval	Lists the IGMP query interval implemented when the querier functionality is enabled. The default value is 60 seconds.
   Version	Lists the multicast router IGMP version compatibility as either version 1, 2 or 3. The default setting is 3.

7. Select Refresh to update the screen's statistics counters to their latest values.