Troubleshooting IGMP snooping ·································································································································· 38
Overview ········································································································································································· 40
RPF check mechanism ··········································································································································· 40
Static multicast routes ············································································································································ 42
Enabling IP multicast routing ········································································································································· 45
Configuration examples ················································································································································ 48
Changing an RPF route ········································································································································· 48
Creating an RPF route ··········································································································································· 50
Static multicast route failure ································································································································· 55
Configuring IGMP ······················································································································································ 56
Overview ········································································································································································· 56
IGMPv1 overview ·················································································································································· 56
IGMPv2 enhancements ········································································································································· 58
IGMPv3 enhancements ········································································································································· 58
IGMP SSM mapping ············································································································································· 60
IGMP proxying ······················································································································································ 61
IGMP support for VPNs ········································································································································ 62
Protocols and standards ······································································································································· 62
IGMP configuration task list ·········································································································································· 62
Configuring basic IGMP functions ······························································································································· 62
Enabling IGMP ······················································································································································ 63
Specifying the IGMP version ································································································································ 63
Adjusting IGMP performance ······································································································································· 64
Configuring IGMP SSM mappings ······························································································································· 66
Configuration prerequisites ·································································································································· 66
Configuration procedure ······································································································································ 66
Configuring IGMP proxying ········································································································································· 66
Configuration prerequisites ·································································································································· 66
Enabling IGMP proxying ······································································································································ 66
Displaying and maintaining IGMP ······························································································································· 68
IGMP configuration examples ······································································································································ 68
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