ii
Static port configuration example ······················································································································· 35
IGMP snooping querier configuration example ································································································· 38
IGMP snooping proxying configuration example ······························································································ 40
Troubleshooting IGMP snooping ·································································································································· 43
Layer 2 multicast forwarding cannot function ···································································································· 43
Configured multicast group policy fails to take effect ······················································································· 43
Appendix ········································································································································································ 44
Processing of multicast protocol messages ········································································································· 44
Configuring PIM snooping ········································································································································ 45
Overview ········································································································································································· 45
Configuring PIM snooping ············································································································································ 46
Displaying and maintaining PIM snooping ················································································································· 46
PIM snooping configuration example ·························································································································· 47
Troubleshooting PIM snooping ····································································································································· 50
PIM snooping does not work ······························································································································· 50
Some downstream PIM-capable routers cannot receive multicast data ·························································· 50
Configuring multicast VLANs ····································································································································· 51
Overview ········································································································································································· 51
Multicast VLAN configuration task list ························································································································· 52
Configuring a multicast VLAN ······································································································································ 52
Configuration guidelines ······································································································································ 52
Configuration procedure ······································································································································ 53
Configuring the maximum number of forwarding entries in a multicast VLAN ······················································· 53
Displaying and maintaining a multicast VLAN ··········································································································· 53
Multicast VLAN configuration example ······················································································································· 54
Configuring multicast routing and forwarding ········································································································· 59
Overview ········································································································································································· 59
RPF check mechanism ··········································································································································· 59
Static multicast routes ············································································································································ 61
GRE tunnel application in multicast forwarding ································································································· 63
Multicast traceroute ··············································································································································· 63
Configuration task list ···················································································································································· 64
Enabling IP multicast routing ········································································································································· 65
Configuring multicast routing and forwarding ············································································································ 65
Configuring static multicast routes ······················································································································· 66
Configuring a multicast routing policy ················································································································ 66
Configuring a multicast forwarding range ········································································································· 67
Configuring the multicast forwarding table size ································································································ 67
Configuring static multicast MAC address entries ····························································································· 68
Configuring RPF check failure processing ·········································································································· 69
Tracing a multicast path ······································································································································· 71
Displaying and maintaining multicast routing and forwarding ················································································· 71
Configuration examples ················································································································································ 73
Changing an RPF route ········································································································································· 73
Creating an RPF route ··········································································································································· 75
Multicast forwarding over a GRE tunnel ············································································································· 77
Troubleshooting multicast routing and forwarding ····································································································· 80
Static multicast route failure ································································································································· 80
Multicast data fails to reach receivers················································································································· 80
Configuring IGMP ······················································································································································ 81
Overview ········································································································································································· 81
IGMP versions ························································································································································ 81
