Multicast Snoop Mode - D-Link DFL-1660 User Manual

4.6.3. IGMP Configuration
Chapter 4. Routing
• Proxy Mode
The operation of these two modes are shown in the following illustrations:
Figure 4.17. Multicast Snoop Mode
Figure 4.18. Multicast Proxy Mode
In Snoop Mode, the NetDefend Firewall will act transparently between the hosts and another IGMP
router. It will not send any IGMP Queries. It will only forward queries and reports between the other
router and the hosts.
In Proxy Mode, the firewall will act as an IGMP router towards the clients and actively send queries.
Towards the upstream router, the firewall will be acting as a normal host, subscribing to multicast
groups on behalf of its clients.
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