Manual

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Switch(Config-if-Vlan1)#ip pim sparse-mode
Switch(Config-if-Vlan1)#ip pim bsr-border
Multicast Configuration:
Suppose the server provides programs through the multicast address 224.1.1.1, and some
hosts subscribe that program on the edge of the network. The host reports their IGMP
multicast group membership to Switch 2 and Switch 3 through downstream ports. Switch 2 and
Switch 3 then aggregate and forward them to Switch 1 which then forwards the information to
multicast router. When multicast dataflow arrives, the IGMP Proxy enabled switches re-
distribute the group membership through upstream ports and downstream ports. When the
multicast router receives the multicast dataflow from IGMP proxy, it will consider the multicast
data source is directly connected to the router, and determine the identity of DR and
ORIGINATOR. The multicast dataflow will be redistributed according to the PIM protocol.
28.11.4 IGMP Proxy Troubleshooting
When IGMP Proxy function configuration and usage, IGMP Proxy might not run properly
because of physical connection or configuration mistakes. So the users should note that:
Make sure physical connection correctly;
Activate IGMP Proxy on whole Global mode (use ip igmp proxy);
Make sure configure one upstream port and at least one downstream port under interface
configuration mode (Use ip igmp proxy upstream, ip igmp proxy downstream);
Use show ip igmp proxy command to check if the IGMP Proxy information is correct.
If the IGMP Proxy problem remains unsolved, please use debug IGMP Proxy and other
debugging command and copy the DEBUG message within three minutes, send the recorded
message to the technical service center of our company.