ii
Group policy and simulated joining configuration example ············································································ 31
Static port configuration example ······················································································································· 33
IGMP snooping querier configuration example ································································································· 36
Troubleshooting IGMP snooping ·································································································································· 38
Layer 2 multicast forwarding cannot function ···································································································· 38
Multicast group filter does not work ···················································································································· 38
Configuring multicast routing and forwarding ········································································································· 40
Overview ········································································································································································· 40
RPF check mechanism ··········································································································································· 40
Static multicast routes ············································································································································ 42
Multicast forwarding across unicast subnets ······································································································ 44
Multicast routing and forwarding configuration task list ··························································································· 44
Enabling IP multicast routing ········································································································································· 45
Configuring multicast routing and forwarding ············································································································ 45
Configuring static multicast routes ······················································································································· 45
Configuring the RPF route selection rule ············································································································· 46
Configuring multicast load splitting ····················································································································· 46
Configuring a multicast forwarding boundary ··································································································· 46
Displaying and maintaining multicast routing and forwarding ················································································· 47
Configuration examples ················································································································································ 48
Changing an RPF route ········································································································································· 48
Creating an RPF route ··········································································································································· 50
Multicast forwarding over a GRE tunnel ············································································································· 52
Troubleshooting multicast routing and forwarding ····································································································· 55
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
Configuring an interface as a static member interface ····················································································· 63
Configuring a multicast group filter ····················································································································· 64
Adjusting IGMP performance ······································································································································· 64
Configuring IGMP query parameters ·················································································································· 64
Enabling IGMP fast-leave processing ·················································································································· 65
Configuring IGMP SSM mappings ······························································································································· 66
Configuration prerequisites ·································································································································· 66
Configuration procedure ······································································································································ 66
Configuring IGMP proxying ········································································································································· 66
Configuration prerequisites ·································································································································· 66
Enabling IGMP proxying ······································································································································ 66
Configuring multicast forwarding on a downstream interface ········································································· 67
Configuring multicast load splitting on the IGMP proxy ··················································································· 67
Displaying and maintaining IGMP ······························································································································· 68
IGMP configuration examples ······································································································································ 68
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