Configuration prerequisites and notes
Before you can configure IGMP, you must prepare the router as follows:
- Configure an IP interface.
- Configure IGMP on a L2 interface by enabling IGMP snooping
or
Configure IGMP on a L3 interface by enabling multicast routing, i.e., DVMRP, PIM-SM or PIM-SSM.
- To enable IGMP snooping, refer to "Enabling IGMP snooping on a VLAN."
- To enable DVMRP or PIM-SM on an IP interface, first enable them globally. (PIM-SSM is a global configuration; you cannot enable it per interface.)
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Note:
To drop IGMPv2 control packets that do not have the router alert option set, click IP Routing > IGMP and open the Interface tab. Change the RouterAlertEnable field to enable.
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To continue, go to:
