D-Link DFL-800-AV-12 User Manual - Page 114
IGMP Configuration
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4.5.3. IGMP Configuration Chapter 4. Routing • Destination Interface: core • Destination Network: 239.192.10.0/24 4. Click the Address Translation tab 5. Add interface if1 but leave the IPAddress empty 6. Add interface if2 but this time, enter 237.192.10.0 as the IPAddress 7. Make sure the forwarded using IGMP checkbox is set 8. Click OK Note If address translation of the source address is required, the Allow rule following the SAT Multiplex rule should be replaced with a NAT rule. 4.5.3. IGMP Configuration IGMP signaling between hosts and routers can be divided into two categories: IGMP Reports Reports are sent from hosts towards the router when a host wants to subscribe to new multicast groups or change current multicast subscriptions. IGMP Queries Queries are IGMP messages sent from the router towards the hosts in order to make sure that it will not close any stream that some host still wants to receive. Normally, both these types of rules has to be specified for IGMP to work. One exception to this is if the multicast source is located on a network directly connected to the router. In this case, no query rule is needed. A second exception is if a neighbouring router is statically configured to deliver a multicast stream to the D-Link Firewall. In this case also, an IGMP query would not have to be specified. NetDefendOS supports two IGMP modes of operation - Snoop and Proxy. Figure 4.6. Multicast Snoop 114