Multicast Forwarding - No Address Translation - D-Link NetDefend DFL-210 User Manual

4.6.2. Multicast Forwarding with SAT
Multiplex Rules
The multiplex rule can operate in one of two modes:
Using IGMP
Not using IGMP

4.6.2.1. Multicast Forwarding - No Address Translation

This scenario describes how to configure multicast forwarding together with IGMP. The multicast
sender is 192.168.10.1 and generates the multicast streams 239.192.10.0/24:1234. These multicast
streams should be forwarded from interface wan through the interfaces if1, if2 and if3. The streams
should only be forwarded if some host has requested the streams using the IGMP protocol.
The example below only covers the multicast forwarding part of the configuration. The IGMP
configuration can be found later in Section 4.6.3.1, "IGMP Rules Configuration - No Address
Translation".
Figure 4.9. Multicast Forwarding - No Address Translation
The traffic flow specified by the multiplex rule must have been requested by
hosts using IGMP before any multicast packets are forwarded through the
specified interfaces. This is the default behavior of NetDefendOS.
The traffic flow will be forwarded according to the specified interfaces
directly without any inference from IGMP.
Note: An Allow or NAT rule is also needed
Since the Multiplex rule is a SAT rule, an Allow or NAT rule also has to be specified as
well as the Multiplex rule.
166
Chapter 4. Routing